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| versions
list | update_date
timestamp[s] | authors_parsed
sequence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0705.1398 | Andrew G. White | B. P. Lanyon, T. J. Weinhold, N. K. Langford, M. Barbieri, D. F. V.
James*, A. Gilchrist, and A. G. White (University of Queensland, *University
of Toronto) | Experimental demonstration of Shor's algorithm with quantum entanglement | 4 pages, 5 figures + half-page additional online material | Physical Review Letters 99, 250505 (2007) | 10.1103/PhysRevLett.99.250505 | null | quant-ph | null | Shor's powerful quantum algorithm for factoring represents a major challenge
in quantum computation and its full realization will have a large impact on
modern cryptography. Here we implement a compiled version of Shor's algorithm
in a photonic system using single photons and employing the non-linearity
induced by measurement. For the first time we demonstrate the core processes,
coherent control, and resultant entangled states that are required in a
full-scale implementation of Shor's algorithm. Demonstration of these processes
is a necessary step on the path towards a full implementation of Shor's
algorithm and scalable quantum computing. Our results highlight that the
performance of a quantum algorithm is not the same as performance of the
underlying quantum circuit, and stress the importance of developing techniques
for characterising quantum algorithms.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 06:58:19 GMT"
},
{
"version": "v2",
"created": "Tue, 16 Oct 2007 05:31:18 GMT"
}
] | 2007-12-27T00:00:00 | [
[
"Lanyon",
"B. P.",
"",
"University of Queensland, *University\n of Toronto"
],
[
"Weinhold",
"T. J.",
"",
"University of Queensland, *University\n of Toronto"
],
[
"Langford",
"N. K.",
"",
"University of Queensland, *University\n of Toronto"
],
[
"Barbieri",
"M.",
"",
"University of Queensland, *University\n of Toronto"
],
[
"James*",
"D. F. V.",
"",
"University of Queensland, *University\n of Toronto"
],
[
"Gilchrist",
"A.",
"",
"University of Queensland, *University\n of Toronto"
],
[
"White",
"A. G.",
"",
"University of Queensland, *University\n of Toronto"
]
] |
0705.1399 | Damien Chablat | Damien Chablat (IRCCyN), Philippe Wenger (IRCCyN) | A New Concept of Modular Parallel Mechanism for Machining Applications | null | Proceeding IEEE International Conference on Robotics and
Automation (2003) 1-6 | null | null | cs.RO | null | The subject of this paper is the design of a new concept of modular parallel
mechanisms for three, four or five-axis machining applications. Most parallel
mechanisms are designed for three- or six-axis machining applications. In the
last case, the position and the orientation of the tool are coupled and the
shape of the workspace is complex. The aim of this paper is to use a simple
parallel mechanism with two-degree-of-freedom (dof) for translation motions and
to add one or two legs to add one or two-dofs for rotation motions. The
kinematics and singular configurations are studied for each mechanism.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 07:03:29 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
]
] |
0705.1400 | Damien Chablat | Philippe Wenger (IRCCyN), Maher Baili (IRCCyN), Damien Chablat
(IRCCyN) | A Workspace based Classification of 3R Orthogonal Manipulators | null | 9th International Symposium on Advances in Robot Kinematics (2004)
1-10 | null | null | cs.RO | null | A classification of a family of 3-revolute (3R) positioning manipulators is
established. This classification is based on the topology of their workspace.
The workspace is characterized in a half-cross section by the singular curves
of the manipulator. The workspace topology is defined by the number of cusps
and nodes that appear on these singular curves. The design parameters space is
shown to be partitioned into nine subspaces of distinct workspace topologies.
Each separating surface is given as an explicit expression in the
DH-parameters.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 07:05:37 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Wenger",
"Philippe",
"",
"IRCCyN"
],
[
"Baili",
"Maher",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
]
] |
0705.1401 | Ana Akrap | A. Akrap, E. Tutis, S.M. Kazakov, N.D. Zhigadlo, J. Karpinski, and L.
Forro | Manifestations of fine features of the density of states in the
transport properties of KOs2O6 | null | Phys. Rev. B, vol.75, 172501 (2007) | 10.1103/PhysRevB.75.172501 | null | cond-mat.supr-con | null | We performed high-pressure transport measurements on high-quality single
crystals of KOs2O6, a beta-pyrochlore superconductor. While the resistivity at
high temperatures might approach saturation, there is no sign of saturation at
low temperatures, down to the superconducting phase. The anomalous resistivity
is accompanied by a nonmetallic behavior in the thermoelectric power (TEP) up
to temperatures of at least 700 K, which also exhibits a broad hump with a
maximum at 60 K. The pressure influences mostly the low-energy electronic
excitations. A simple band model based on enhanced density of states in a
narrow window around the Fermi energy (EF) explains the main features of this
unconventional behavior in the transport coefficients and its evolution under
pressure.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 07:22:23 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Akrap",
"A.",
""
],
[
"Tutis",
"E.",
""
],
[
"Kazakov",
"S. M.",
""
],
[
"Zhigadlo",
"N. D.",
""
],
[
"Karpinski",
"J.",
""
],
[
"Forro",
"L.",
""
]
] |
0705.1402 | Elena Shneyder I. | E. I. Shneyder, S. G. Ovchinnikov | Phonon and Magnetic Pairing Mechanisms in High-Temperature
Superconductors in the Strong Correlation Mode | 5 pages, 3 figures | JETP Letters 83 (2006) 394-398 | null | null | cond-mat.supr-con cond-mat.str-el | null | The t-t'-t''-J model of electrons interacting with three phonon modes
(breathing, apical breathing, and buckling) is considered. The wave-vector
dependence of the matrix elements of the electron-phonon interaction leads to
opposite contributions to the pairing potential with the d-symmetry: the
buckling mode facilitates electron pairing, while the breathing mode suppresses
it. As a result, the critical temperature of La{2 - x}Sr{x}CuO{4} that is
associated with the magnetic mechanism is lowered when phonons are taken into
account.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 07:32:29 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Shneyder",
"E. I.",
""
],
[
"Ovchinnikov",
"S. G.",
""
]
] |
0705.1403 | Beatrix Hiesmayr C. | B. Baumgartner, B.C. Hiesmayr and H. Narnhofer | The geometry of bipartite qutrits including bound entanglement | extended version: new results added, 6 pages, 6 figures. accepted by
Physics Letters A | Physics Letters A, Vol. 372, Issue 13, 2190-2195 (2008) | 10.1016/j.physleta.2007.11.028 | null | quant-ph | null | We investigate the state space of bipartite qutrits. We construct an analog
to the "magic" tetrahedron for bipartite qubits--a magic simplex W. It is
formed by all convex combination of nine Bell states which are constructed
using the Weyl operators. Due to the high symmetry it is enough to consider
certain typical slices through W. Via optimal entanglement witnesses we find
regions of bound entangled states inside W.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:03:55 GMT"
},
{
"version": "v2",
"created": "Thu, 15 Nov 2007 16:47:07 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Baumgartner",
"B.",
""
],
[
"Hiesmayr",
"B. C.",
""
],
[
"Narnhofer",
"H.",
""
]
] |
0705.1404 | Xian-Hui Ge | Xian-Hui Ge, Sung-Won Kim | Probing extra dimensions with higher dimensional black hole analogues? | 16 pages, 5 figures; Version 2, some references added | Phys.Lett.B652:349-358,2007 | 10.1016/j.physletb.2007.06.079 | null | hep-th gr-qc hep-ph | null | We propose that extra dimensions might be detected with higher dimensional
analogues of black holes. The usual 4-dimensional acoustic(sonic)black hole
metric is extended to arbitrary dimensions. The absorption cross-section of
Hawking radiation on the brane and in the bulk are calculated in the
semiclassical approximation.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 07:46:51 GMT"
},
{
"version": "v2",
"created": "Tue, 15 May 2007 01:17:28 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Ge",
"Xian-Hui",
""
],
[
"Kim",
"Sung-Won",
""
]
] |
0705.1405 | Hayato Nakano | H. Nakano, K. Kakuyanagi, M. Ueda, and K. Semba | Long-range and selective coupler for superconducting flux qubits | 8 pages, 4 figures | null | 10.1063/1.2756275 | null | cond-mat.supr-con | null | We propose a qubit-qubit coupling scheme for superconducting flux quantum
bits (qubits), where a quantized Josephson junction resonator and microwave
irradiation are utilized. The junction is used as a tunable inductance
controlled by changing the bias current flowing through the junction, and thus
the circuit works as a tunable resonator. This enables us to make any qubits
interact with the resonator. Entanglement between two of many qubits whose
level splittings satisfy some conditions, is formed by microwave irradiation
causing a two-photon Rabi oscillation. Since the size of the resonator can be
as large as sub-millimeters and qubits interact with it via mutual inductance,
our scheme makes it possible to construct a quantum gate involving remote
qubits
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 07:51:37 GMT"
},
{
"version": "v2",
"created": "Wed, 23 May 2007 04:35:36 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Nakano",
"H.",
""
],
[
"Kakuyanagi",
"K.",
""
],
[
"Ueda",
"M.",
""
],
[
"Semba",
"K.",
""
]
] |
0705.1406 | Ladislav \v{S}amaj | L. Samaj | A Trickiness of the High-Temperature Limit for Number Density
Correlation Functions in Classical Coulomb Fluids | 18 pages, to appear in J. Stat. Phys | J. Stat. Phys. 128 (2007) 569-586 | 10.1007/s10955-007-9337-6 | null | cond-mat.stat-mech | null | The Debye-H\"uckel theory describes rigorously the thermal equilibrium of
classical Coulomb fluids in the high-temperature $\beta\to 0$ regime ($\beta$
denotes the inverse temperature). It is generally believed that the
Debye-H\"uckel theory and the systematic high-temperature expansion provide an
adequate description also in the region of small {\em strictly positive} values
of $\beta>0$. This hypothesis is tested in the present paper on a
two-dimensional Coulomb gas of pointlike $+/-$ unit charges interacting via a
logarithmic potential which is equivalent to an integrable sine-Gordon field
model. In particular, we apply a form factor method to obtain the exact
asymptotic large-distance behavior of particle correlation functions,
considered in the charge and number density combinations. We first determine
the general forms of the leading and subleading asymptotic terms at strictly
positive $\beta>0$ and then evaluate their high-temperature $\beta\to 0$ forms.
In the case of the {\em charge} correlation function, the leading asymptotic
term at a strictly positive $\beta>0$ is also the leading one in the
high-temperature $\beta\to 0$ regime. On the contrary, the $\beta\to 0$
behavior of the {\em number density} correlation function is accompanied by an
interference between the first two asymptotic terms. Consequently, the
large-distance behavior of this function exhibits a discontinuity when going
from strictly positive values of $\beta>0$ to the Debye-H\"uckel limit
$\beta\to 0$. This is the crucial conclusion of the paper: the large-distance
asymptotics and the high-temperature limit do not commute for the density
correlation function of the two-dimensional Coulomb gas.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 07:56:10 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Samaj",
"L.",
""
]
] |
0705.1407 | Pavel Exner | Pavel Exner, Martin Fraas | On the dense point and absolutely continuous spectrum for Hamiltonians
with concentric $\delta$ shells | LaTeX 2e, 12 pages | Lett. Math. Phys. 82 (2007), 25-37 | 10.1007/s11005-007-0191-x | null | math-ph cond-mat.mes-hall math.MP math.SP quant-ph | null | We consider Schr\"odinger operator in dimension $d\ge 2$ with a singular
interaction supported by an infinite family of concentric spheres, analogous to
a system studied by Hempel and coauthors for regular potentials. The essential
spectrum covers a halfline determined by the appropriate one-dimensional
comparison operator; it is dense pure point in the gaps of the latter. If the
interaction is radially periodic, there are absolutely continuous bands; in
contrast to the regular case the measure of the p.p. segments does not vanish
in the high-energy limit.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:06:55 GMT"
}
] | 2019-12-10T00:00:00 | [
[
"Exner",
"Pavel",
""
],
[
"Fraas",
"Martin",
""
]
] |
0705.1408 | Alexey Shorikov | A.O. Shorikov, M.M. Korshunov, V.I. Anisimov | Role of electronic correlations in the Fermi surface formation of
Na$_x$CoO$_2$ | 6 pages, 2 figures | JETP Letters 93, 80 (2011) [Pis'ma v ZhETF 93, 83 (2011)] | 10.1134/S0021364011020123 | null | cond-mat.str-el cond-mat.supr-con | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Band structure of metallic sodium cobaltate Na$_x$CoO$_2$ ($x$=0.33, 0.48,
0.61 0.72) has been investigated by local density approximation+Hubbard $U$
(LDA+$U$) method and within Gutzwiller approximation for the Co-$t_{2g}$
manifold. Correlation effects being taken into account results in suppression
of the $e'_g$ hole pockets at the Fermi surface in agreement with recent
angle-resolved photo-emission spectroscopy (ARPES) experiments. In the
Gutzwiller approximation the bilayer splitting is significantly reduced due to
the correlation effects. The formation of high spin (HS) state in Co $d$-shell
was shown to be very improbable.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:15:57 GMT"
},
{
"version": "v2",
"created": "Thu, 10 Mar 2011 17:22:50 GMT"
}
] | 2011-03-11T00:00:00 | [
[
"Shorikov",
"A. O.",
""
],
[
"Korshunov",
"M. M.",
""
],
[
"Anisimov",
"V. I.",
""
]
] |
0705.1409 | Damien Chablat | Mazen Zein (IRCCyN), Philippe Wenger (IRCCyN), Damien Chablat (IRCCyN) | Singularity Surfaces and Maximal Singularity-Free Boxes in the Joint
Space of Planar 3-RPR Parallel Manipulators | null | 12th World Congress in Mechanism and Machine Science (18/06/2007)
1-6 | null | null | cs.RO | null | In this paper, a method to compute joint space singularity surfaces of 3-RPR
planar parallel manipulators is first presented. Then, a procedure to determine
maximal joint space singularity-free boxes is introduced. Numerical examples
are given in order to illustrate graphically the results. This study is of high
interest for planning trajectories in the joint space of 3-RPR parallel
manipulators and for manipulators design as it may constitute a tool for
choosing appropriate joint limits and thus for sizing the link lengths of the
manipulator.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:32:06 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Zein",
"Mazen",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
]
] |
0705.1410 | Damien Chablat | Daniel Kanaan (IRCCyN), Philippe Wenger (IRCCyN), Damien Chablat
(IRCCyN) | Kinematics analysis of the parallel module of the VERNE machine | null | 12th World Congress in Mechanism and Machine Science (18/06/2007)
1-6 | null | null | cs.RO | null | The paper derives the inverse and forward kinematic equations of a spatial
three-degree-of-freedom parallel mechanism, which is the parallel module of a
hybrid serial-parallel 5-axis machine tool. This parallel mechanism consists of
a moving platform that is connected to a fixed base by three non-identical
legs. Each leg is made up of one prismatic and two pair spherical joint, which
are connected in a way that the combined effects of the three legs lead to an
over-constrained mechanism with complex motion. This motion is defined as a
simultaneous combination of rotation and translation.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:32:53 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Kanaan",
"Daniel",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
]
] |
0705.1411 | Valentin Ovsienko | Hichem Gargoubi, Valentin Ovsienko (ICJ) | Supertransvectants and symplectic geometry | null | null | null | null | math-ph math.MP math.RT math.SG | null | We consider the $osp(1|2)$-invariant bilinear operations on weighted
densities on the supercircle $S^{1|1}$ called the supertransvectants. These
operations are analogues of the famous Gordan transvectants (or Rankin-Cohen
brackets). We prove that these operations coincide with the iterated Poisson
and ghost Poisson brackets on ${\mathbb R}^{2|1}$ and apply this result to
construct star-products involving the supertransvectants.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:34:24 GMT"
},
{
"version": "v2",
"created": "Wed, 13 Feb 2008 12:31:30 GMT"
}
] | 2008-02-13T00:00:00 | [
[
"Gargoubi",
"Hichem",
"",
"ICJ"
],
[
"Ovsienko",
"Valentin",
"",
"ICJ"
]
] |
0705.1412 | Henri-Claude Nataf | Henri-Claude Nataf (LGIT), Thierry Alboussiere (LGIT), Daniel Brito
(LGIT), Philippe Cardin (LGIT), Nad\`ege Gagni\`ere (LGIT), Dominique Jault
(LGIT), Denys Schmitt (LGIT) | Rapidly rotating spherical Couette flow in a dipolar magnetic field: an
experimental study of the mean axisymmetric flow | in press in Physics of the Earth and Planetary Interiors | Physics of The Earth and Planetary Interiors 170 (2008) 60-72 | 10.1016/j.pepi.2008.07.034 | null | physics.geo-ph astro-ph physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to explore the magnetostrophic regime expected for planetary cores,
experiments have been conducted in a rotating sphere filled with liquid sodium,
with an imposed dipolar magnetic field (the DTS setup). The field is produced
by a permanent magnet enclosed in an inner sphere, which can rotate at a
separate rate, producing a spherical Couette flow. The flow properties are
investigated by measuring electric potentials on the outer sphere, the induced
magnetic field in the laboratory frame, and velocity profiles inside the liquid
sodium using ultrasonic Doppler velocimetry. The present article focuses on the
time-averaged axisymmetric part of the flow. The Doppler profiles show that the
angular velocity of the fluid is relatively uniform in most of the fluid shell,
but rises near the inner sphere, revealing the presence of a magnetic wind, and
gently drops towards the outer sphere. The transition from a magnetostrophic
flow near the inner sphere to a geostrophic flow near the outer sphere is
controlled by the local Elsasser number. For Rossby numbers up to order 1, the
observed velocity profiles all show a similar shape. Numerical simulations in
the linear regime are computed, and synthetic velocity profiles are compared
with the measured ones. In the geostrophic region, a torque-balance model
provides very good predictions. We find that the induced magnetic field varies
in a consistent fashion, and displays a peculiar peak in the counter-rotating
regime. This happens when the fluid rotation rate is almost equal and opposite
to the outer sphere rotation rate. The fluid is then almost at rest in the
laboratory frame, and the Proudman-Taylor constraint vanishes, enabling a
strong meridional flow. We suggest that dynamo action might be favored in such
a situation.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:37:55 GMT"
},
{
"version": "v2",
"created": "Fri, 8 Aug 2008 09:59:09 GMT"
}
] | 2008-11-14T00:00:00 | [
[
"Nataf",
"Henri-Claude",
"",
"LGIT"
],
[
"Alboussiere",
"Thierry",
"",
"LGIT"
],
[
"Brito",
"Daniel",
"",
"LGIT"
],
[
"Cardin",
"Philippe",
"",
"LGIT"
],
[
"Gagnière",
"Nadège",
"",
"LGIT"
],
[
"Jault",
"Dominique",
"",
"LGIT"
],
[
"Schmitt",
"Denys",
"",
"LGIT"
]
] |
0705.1413 | Schoeffel Laurent | L. Schoeffel | Diffraction : Recent Results and Implications for LHC | 4 pages, 3 figures, 42nd Rencontres de Moriond on QCD and Hadronic
Interactions, La Thuile, Italy, 17-24 Mar 2007 | null | null | null | hep-ph | null | With the knowledge of diffractive parton densities extracted from HERA data,
we discuss the observation of exclusive events using the dijet mass fraction as
measured by the CDF collaboration at the Tevatron. In particular the impact of
the gluon density uncertainty is analysed. Some prospects are given for
diffractive physics at the LHC.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:14:58 GMT"
},
{
"version": "v2",
"created": "Fri, 11 May 2007 10:07:36 GMT"
},
{
"version": "v3",
"created": "Sun, 13 May 2007 13:38:17 GMT"
},
{
"version": "v4",
"created": "Sat, 21 Jul 2007 07:00:49 GMT"
}
] | 2007-07-21T00:00:00 | [
[
"Schoeffel",
"L.",
""
]
] |
0705.1414 | Yi-Xin Chen | Yi-Xin Chen, Yong Xiao | The Entropy Bound for Local Quantum Field Theory | Revtex, 4 page, title changed, the published version | Phys.Lett.B662:71-74,2009 | 10.1016/j.physletb.2008.02.045 | null | hep-th | null | We investigate the entropy bound for local quantum field theory in this
paper. Both the bosonic and fermionic fields confined to an asymptotically flat
spacetime are examined. By imposing the non-gravitational collapse condition,
we find both of them are limited by the same entropy bound $A^{3/4}$, where $A$
is the boundary area of the region where the quantum fields are contained in.
The gap between this entropy bound and the holographic entropy has been
verified.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:41:00 GMT"
},
{
"version": "v2",
"created": "Thu, 3 Apr 2008 06:19:57 GMT"
}
] | 2010-12-09T00:00:00 | [
[
"Chen",
"Yi-Xin",
""
],
[
"Xiao",
"Yong",
""
]
] |
0705.1415 | Sujin Babu | Sujin Babu, Jean Christophe Gimel and Taco Nicolai | Self diffusion of reversibly aggregating spheres | 10 figures | J. Chem. Phys. 127 054503-1-7 (2007) | 10.1063/1.2756838 | null | cond-mat.soft | null | Reversible diffusion limited cluster aggregation of hard spheres with rigid
bonds was simulated and the self diffusion coefficient was determined for
equilibrated systems. The effect of increasing attraction strength was
determined for systems at different volume fractions and different interaction
ranges. It was found that the slowing down of the diffusion coefficient due to
crowding is decoupled from that due to cluster formation. The diffusion
coefficient could be calculated from the cluster size distribution and became
zero only at infinite attraction strength when permanent gels are formed. It is
concluded that so-called attractive glasses are not formed at finite
interaction strength.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:50:51 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Babu",
"Sujin",
""
],
[
"Gimel",
"Jean Christophe",
""
],
[
"Nicolai",
"Taco",
""
]
] |
0705.1416 | Ladislav \v{S}amaj | L. Samaj | A Generalization of the Stillinger-Lovett Sum Rules for the
Two-Dimensional Jellium | 16 pages | J. Stat. Phys. 128 (2007) 1415-1428 | 10.1007/s10955-007-9376-z | null | cond-mat.stat-mech | null | In the equilibrium statistical mechanics of classical Coulomb fluids, the
long-range tail of the Coulomb potential gives rise to the Stillinger-Lovett
sum rules for the charge correlation functions. For the jellium model of mobile
particles of charge $q$ immersed in a neutralizing background, the fixing of
one of the $q$-charges induces a screening cloud of the charge density whose
zeroth and second moments are determined just by the Stillinger-Lovett sum
rules. In this paper, we generalize these sum rules to the screening cloud
induced around a pointlike guest charge $Z q$ immersed in the bulk interior of
the 2D jellium with the coupling constant $\Gamma=\beta q^2$ ($\beta$ is the
inverse temperature), in the whole region of the thermodynamic stability of the
guest charge $Z>-2/\Gamma$. The derivation is based on a mapping technique of
the 2D jellium at the coupling $\Gamma$ = (even positive integer) onto a
discrete 1D anticommuting-field theory; we assume that the final results remain
valid for all real values of $\Gamma$ corresponding to the fluid regime. The
generalized sum rules reproduce for arbitrary coupling $\Gamma$ the standard
Z=1 and the trivial Z=0 results. They are also checked in the Debye-H\"uckel
limit $\Gamma\to 0$ and at the free-fermion point $\Gamma=2$. The generalized
second-moment sum rule provides some exact information about possible sign
oscillations of the induced charge density in space.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 08:56:52 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Samaj",
"L.",
""
]
] |
0705.1417 | Mousumi Das | M.Das (RRI), N.Kantharia (NCRA), S.Ramya (IIA), T.P.Prabhu (IIA),
S.S.McGaugh (UMD), S.N.Vogel (UMD) | The AGN and Gas Disk in the Low Surface Brightness Galaxy PGC045080 | Paper contains 14 figures and 4 tables. Figures 8, 10 (color) and 13
supplied separately. Accepted for publication in MNRAS | Mon.Not.Roy.Astron.Soc.379:11-20,2007 | 10.1111/j.1365-2966.2007.11965.x | null | astro-ph | null | We present radio observations and optical spectroscopy of the giant low
surface brightness (LSB) galaxy PGC 045080 (or 1300+0144). PGC 045080 is a
moderately distant galaxy having a highly inclined optical disk and massive HI
gas content. Radio continuum observations of the galaxy were carried out at 320
MHz, 610 MHz and 1.4 GHz. Continuum emission was detected and mapped in the
galaxy. The emission appears extended over the inner disk at all three
frequencies. At 1.4 GHz and 610 MHz it appears to have two distinct lobes. We
also did optical spectroscopy of the galaxy nucleus; the spectrum did not show
any strong emission lines associated with AGN activity but the presence of a
weak AGN cannot be ruled out. Furthermore, comparison of the H$\alpha$ flux and
radio continuum at 1.4 GHz suggests that a significant fraction of the emission
is non-thermal in nature. Hence we conclude that a weak or hidden AGN may be
present in PGC 045080. The extended radio emission represents lobes/jets from
the AGN. These observations show that although LSB galaxies are metal poor and
have very little star formation, their centers can host significant AGN
activity. We also mapped the HI gas disk and velocity field in PGC 045080. The
HI disk extends well beyond the optical disk and appears warped. In the HI
intensity maps, the disk appears distinctly lopsided. The velocity field is
disturbed on the lopsided side of the disk but is fairly uniform in the other
half. We derived the HI rotation curve for the galaxy from the velocity field.
The rotation curve has a flat rotation speed of ~ 190 km/s.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:00:48 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Das",
"M.",
"",
"RRI"
],
[
"Kantharia",
"N.",
"",
"NCRA"
],
[
"Ramya",
"S.",
"",
"IIA"
],
[
"Prabhu",
"T. P.",
"",
"IIA"
],
[
"McGaugh",
"S. S.",
"",
"UMD"
],
[
"Vogel",
"S. N.",
"",
"UMD"
]
] |
0705.1418 | Takehito Yokoyama | Takehito Yokoyama, Shiro Kawabata, Takeo Kato, and Yukio Tanaka | Theory of Macroscopic Quantum Tunneling in High-T_c c-Axis Josephson
Junctions | 15 pages, 8 figures, 1 table | Phys. Rev. B 76, 134501 (2007) | 10.1103/PhysRevB.76.134501 | null | cond-mat.supr-con cond-mat.mes-hall quant-ph | null | We study macroscopic quantum tunneling (MQT) in c-axis twist Josephson
junctions made of high-T_c superconductors in order to clarify the influence of
the anisotropic order parameter symmetry (OPS) on MQT. The dependence of the
MQT rate on the twist angle $\gamma$ about the c-axis is calculated by using
the functional integral and the bounce method. Due to the d-wave OPS, the
$\gamma$ dependence of standard deviation of the switching current distribution
and the crossover temperature from thermal activation to MQT are found to be
given by $\cos2\gamma$ and $\sqrt{\cos2\gamma}$, respectively. We also show
that a dissipative effect resulting from the nodal quasiparticle excitation on
MQT is negligibly small, which is consistent with recent MQT experiments using
Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8 + \delta}$ intrinsic junctions. These results
indicate that MQT in c-axis twist junctions becomes a useful experimental tool
for testing the OPS of high-T_c materials at low temperature, and suggest high
potential of such junctions for qubit applications.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:05:30 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 05:06:24 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Yokoyama",
"Takehito",
""
],
[
"Kawabata",
"Shiro",
""
],
[
"Kato",
"Takeo",
""
],
[
"Tanaka",
"Yukio",
""
]
] |
0705.1419 | Satoru Sugimoto | Satoru Sugimoto, Hiroshi Toki, Kiyomi Ikeda | Effect of the tensor force in the exchange channel on the spin-orbit
splitting in 23F in the Hartree-Fock framework | null | Phys.Rev.C76:054310,2007 | 10.1103/PhysRevC.76.054310 | null | nucl-th | null | We study the spin-orbit splitting ($ls$-splitting) for the proton d-orbits in
23F in the Hartree-Fock framework with the tensor force in the exchange
channel. 23F has one more proton around the neutron-rich nucleus 22O. A recent
experiment indicates that the ls-splitting for the proton d-orbits in 23F is
reduced from that in 17F. Our calculation shows that the ls-splitting in 23F
becomes smaller by about a few MeV due to the tensor force. This effect comes
from the interaction between the valence proton and the occupied neutrons in
the 0d5/2 orbit through the tensor force and makes the ls-splitting in 23F
close to the experimental data.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:07:07 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Sugimoto",
"Satoru",
""
],
[
"Toki",
"Hiroshi",
""
],
[
"Ikeda",
"Kiyomi",
""
]
] |
0705.1420 | S\'ebastien Falgui\`eres | S\'ebastien Falgui\`eres and Stefaan Vaes | Every compact group arises as the outer automorphism group of a II_1
factor | Minor misprints corrected, final version | Journal of Functional Analysis, vol. 254 (2008), 2317--2328. | null | null | math.OA | null | We show that any compact group can be realized as the outer automorphism
group of a factor of type II_1. This has been proved in the abelian case by
Ioana, Peterson and Popa applying Popa's deformation/rigidity techniques to
amalgamated free product von Neumann algebras. Our methods are a generalization
of theirs.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:34:42 GMT"
},
{
"version": "v2",
"created": "Thu, 7 Feb 2008 17:22:02 GMT"
}
] | 2008-04-04T00:00:00 | [
[
"Falguières",
"Sébastien",
""
],
[
"Vaes",
"Stefaan",
""
]
] |
0705.1421 | Pierre Jop | Pierre Jop (Phys-ENS), Artyom Petrosyan (Phys-ENS), Sergio Ciliberto
(Phys-ENS) | Comment on ''Measurement of Effective Temperatures in an Aging Colloidal
Glass'' | null | null | null | null | cond-mat.stat-mech | null | We measure the fluctuations of the position of a silica bead trapped by an
optical tweezers during the aging of a Laponite suspension. We find that the
effective temperature is equal to the bath temperature.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:41:23 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Jop",
"Pierre",
"",
"Phys-ENS"
],
[
"Petrosyan",
"Artyom",
"",
"Phys-ENS"
],
[
"Ciliberto",
"Sergio",
"",
"Phys-ENS"
]
] |
0705.1422 | Martin Wolf | Martin Wolf | Self-Dual Supergravity and Twistor Theory | v3: 1+47 pages, typos corrected, references and minor clarifications
added, replaced with published version | Class.Quant.Grav.24:6287-6328,2007 | 10.1088/0264-9381/24/24/010 | Imperial-TP-MW-01/07 | hep-th math-ph math.MP | null | By generalizing and extending some of the earlier results derived by Manin
and Merkulov, a twistor description is given of four-dimensional N-extended
(gauged) self-dual supergravity with and without cosmological constant.
Starting from the category of (4|4N)-dimensional complex superconformal
supermanifolds, the categories of (4|2N)-dimensional complex quaternionic,
quaternionic Kaehler and hyper-Kaehler right-chiral supermanifolds are
introduced and discussed. We then present a detailed twistor description of
these types of supermanifolds. In particular, we construct supertwistor spaces
associated with complex quaternionic right-chiral supermanifolds, and explain
what additional supertwistor data allows for giving those supermanifolds a
hyper-Kaehler structure. In this way, we obtain a supersymmetric generalization
of Penrose's nonlinear graviton construction. We furthermore give an
alternative formulation in terms of a supersymmetric extension of LeBrun's
Einstein bundle. This allows us to include the cases with nonvanishing
cosmological constant. We also discuss the bundle of local supertwistors and
address certain implications thereof. Finally, we comment on a real version of
the theory related to Euclidean signature.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 16:34:16 GMT"
},
{
"version": "v2",
"created": "Wed, 13 Jun 2007 14:56:58 GMT"
},
{
"version": "v3",
"created": "Tue, 20 Nov 2007 11:39:55 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Wolf",
"Martin",
""
]
] |
0705.1423 | Enric Nart | Cevahir Demirkiran and Enric Nart | Counting hyperelliptic curves that admit a Koblitz model | null | null | null | null | math.NT math.AG | null | Let k be a finite field of odd characteristic. We find a closed formula for
the number of k-isomorphism classes of pointed, and non-pointed, hyperelliptic
curves of genus g over k, admitting a Koblitz model. These numbers are
expressed as a polynomial in the cardinality q of k, with integer coefficients
(for pointed curves) and rational coefficients (for non-pointed curves). The
coefficients depend on g and the set of divisors of q-1 and q+1. These formulas
show that the number of hyperelliptic curves of genus g suitable (in principle)
of cryptographic applications is asymptotically (1-e^{-1})2q^{2g-1}, and not
2q^{2g-1} as it was believed. The curves of genus g=2 and g=3 are more
resistant to the attacks to the DLP; for these values of g the number of curves
is respectively (91/72)q^3+O(q^2) and (3641/2880)q^5+O(q^4).
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:50:07 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Demirkiran",
"Cevahir",
""
],
[
"Nart",
"Enric",
""
]
] |
0705.1424 | Ruanyao Duan | Runyao Duan, Yuan Feng, Mingsheng Ying | Local Distinguishability of Multipartite Unitary Operations | 5 pages (in Revtex 4), 1 eps. A preliminary version. Comments are
welcome | Phys. Rev. Lett. 100, 020503 (2008) | 10.1103/PhysRevLett.100.020503 | null | quant-ph | null | We show that any two different unitary operations acting on an arbitrary
multipartite quantum system can be perfectly distinguishable by local
operations and classical communication when a finite number of runs is allowed.
We then directly extend this result into the case when the number of unitary
operations to be discriminated is more than two. Intuitively, our result means
that the lost identity of a nonlocal (entangled) unitary operation can be
recovered locally, without any use of entanglement or joint quantum operations.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 10:11:02 GMT"
}
] | 2011-11-09T00:00:00 | [
[
"Duan",
"Runyao",
""
],
[
"Feng",
"Yuan",
""
],
[
"Ying",
"Mingsheng",
""
]
] |
0705.1425 | Claus Heussinger | Claus Heussinger and Erwin Frey | Force distributions and force chains in random stiff fiber networks | 7 pages, 7 figures, final version as published | Eur. Phys. J. E 24, 47-53 (2007) | 10.1140/epje/i2007-10209-1 | LMU-ASC 29/07 | cond-mat.soft cond-mat.mtrl-sci | null | We study the elasticity of random stiff fiber networks. The elastic response
of the fibers is characterized by a central force stretching stiffness as well
as a bending stiffness that acts transverse to the fiber contour. Previous
studies have shown that this model displays an anomalous elastic regime where
the stretching mode is fully frozen out and the elastic energy is completely
dominated by the bending mode. We demonstrate by simulations and scaling
arguments that, in contrast to the bending dominated \emph{elastic energy}, the
equally important \emph{elastic forces} are to a large extent stretching
dominated. By characterizing these forces on microscopic, mesoscopic and
macroscopic scales we find two mechanisms of how forces are transmitted in the
network. While forces smaller than a threshold $F_c$ are effectively balanced
by a homogeneous background medium, forces larger than $F_c$ are found to be
heterogeneously distributed throughout the sample, giving rise to highly
localized force-chains known from granular media.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:51:21 GMT"
},
{
"version": "v2",
"created": "Tue, 2 Oct 2007 08:10:06 GMT"
}
] | 2007-10-02T00:00:00 | [
[
"Heussinger",
"Claus",
""
],
[
"Frey",
"Erwin",
""
]
] |
0705.1426 | Fabio Biancalana | Fabio Biancalana, Andreas Amann, Alexander V. Uskov, Eoin P. O'Reilly | Dynamics of light propagation in spatiotemporal dielectric structures | null | Phys. Rev. E 75, 046607 (2007) | 10.1103/PhysRevE.75.046607 | null | physics.optics | null | Propagation, transmission and reflection properties of linearly polarized
plane waves and arbitrarily short electromagnetic pulses in one-dimensional
dispersionless dielectric media possessing an arbitrary space-time dependence
of the refractive index are studied by using a two-component, highly symmetric
version of Maxwell's equations. The use of any slow varying amplitude
approximation is avoided. Transfer matrices of sharp nonstationary interfaces
are calculated explicitly, together with the amplitudes of all secondary waves
produced in the scattering. Time-varying multilayer structures and
spatiotemporal lenses in various configurations are investigated analytically
and numerically in a unified approach. Several new effects are reported, such
as pulse compression, broadening and spectral manipulation of pulses by a
spatiotemporal lens, and the closure of the forbidden frequency gaps with the
subsequent opening of wavenumber bandgaps in a generalized Bragg reflector.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 09:59:22 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Biancalana",
"Fabio",
""
],
[
"Amann",
"Andreas",
""
],
[
"Uskov",
"Alexander V.",
""
],
[
"O'Reilly",
"Eoin P.",
""
]
] |
0705.1427 | Josep Miquel Girart | J. M. Girart, S. Viti | The origin of the molecular emission around the southern hemisphere Re 4
IRS - HH 188 region | 9 pages, 6 figures, accepted for publication in Astronomy &
Astrophysics | null | 10.1051/0004-6361:20066296 | null | astro-ph | null | We present SEST observations of the molecular environment ahead of the
southern Herbig-Haro object 188 (HH188), associated with the low-mass protostar
Re4 IRS. We have also used the SuperCosmos Halpha survey to search for Halpha
emission associated with the Re4 IRS - HH188 region. The aim of the present
work is to study the properties of the molecular gas and to better characterize
this southern star forming region. We mapped the HCO+ 3-2 and H13CO+ 1-0
emission around the YSO and took spectra of the CH3OH 2(0)-1(0)A+ and
2(-1)-1(-1)E and SO 6(5)-5(4) towards the central source. Column densities are
derived and different scenarios are considered to explain the origin of the
molecular emission. HCO+ arises from a relatively compact region around the
YSO; however, its peak emission is displaced to the south following the outflow
direction. Our chemical analysis indicates that a plausible scenario is that
most of the emission arises from the cold, illuminated dense gas ahead of the
HH188 object. We have also found that HH188, a high excitation object, seems to
be part of a parsec scale and highly collimated HH system. Re4 IRS is probably
a binary protostellar system, in the late Class 0 or Class I phase. One of the
protostars, invisible in the near-IR, seems to power the HH188 system.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 10:09:17 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Girart",
"J. M.",
""
],
[
"Viti",
"S.",
""
]
] |
0705.1428 | Marco Zoli | Marco Zoli | Path Integral Methods in the Su-Schrieffer-Heeger Polaron Problem | to appear in "Polarons in Advanced Materials" ed. A.S. Alexandrov
(Canopus Books, 2007) | null | 10.1007/978-1-4020-6348-0_6 | null | cond-mat.mtrl-sci cond-mat.stat-mech stat.AP | null | I propose a path integral description of the Su-Schrieffer-Heeger
Hamiltonian, both in one and two dimensions, after mapping the real space model
onto the time scale. While the lattice degrees of freedom are classical
functions of time and are integrated out exactly, the electron particle paths
are treated quantum mechanically. The method accounts for the variable range of
the electronic hopping processes. The free energy of the system and its
temperature derivatives are computed by summing at any $T$ over the ensemble of
relevant particle paths which mainly contribute to the total partition
function. In the low $T$ regime, the {\it heat capacity over T} ratio shows un
upturn peculiar to a glass-like behavior. This feature is more sizeable in the
square lattice than in the linear chain as the overall hopping potential
contribution to the total action is larger in higher dimensionality. The
effects of the electron-phonon anharmonic interactions on the phonon subsystem
are studied by the path integral cumulant expansion method.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 10:15:24 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Zoli",
"Marco",
""
]
] |
0705.1429 | J. A. Caballero | J.A. Caballero, J.E. Amaro, M.B. Barbaro, T.W. Donnelly, J.M. Udias | Scaling and isospin effects in quasielastic lepton-nucleus scattering in
the Relativistic Mean Field Approach | 10 pages, 5 figures, submitted to Phys. Lett. B | Phys.Lett.B653:366-372,2007 | 10.1016/j.physletb.2007.08.018 | null | nucl-th hep-ph | null | The role of isospin in quasielastic electron scattering and charge-changing
neutrino reactions is investigated in the relativistic impulse approximation.
We analyze proton and neutron scaling functions making use of various
theoretical descriptions for the final-state interactions, focusing on the
effects introduced by the presence of strong scalar and vector terms in the
relativistic mean field approach. An explanation for the differences observed
in the scaling functions evaluated from $(e,e')$ and $(\nu,\mu)$ reactions is
provided by invoking the differences in isoscalar and isovector contributions.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 10:23:11 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Caballero",
"J. A.",
""
],
[
"Amaro",
"J. E.",
""
],
[
"Barbaro",
"M. B.",
""
],
[
"Donnelly",
"T. W.",
""
],
[
"Udias",
"J. M.",
""
]
] |
0705.1430 | Pierre Bel | Pierre Bel (A2X) | Fonction Z\^eta de Hurwitz p-adique et irrationalit\'e | null | null | null | null | math.NT | null | The knowledge on irrationality of p-adic zeta values has recently progressed.
The irrationality of zeta_2(2), \zeta_2(3) and of a few other p-adic series of
Dirichlet was obtained by F. Calegari. F. Beukers gave a more elementary proof
of this result. In parallel, T. Rivoal has just obtained, in the complex case,
some Pade approximants of Lerch functions. It is this work which, transposed to
C_p, enables us to obtain results of irrationality and linear independence.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 10:24:54 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Bel",
"Pierre",
"",
"A2X"
]
] |
0705.1431 | Hongxing Yin | H.X. Yin, C.M. Zhang, Y.H. Zhao, Y.J. Lei, J.L. Qu, L.M. Song, F.
Zhang | The correlations between the spin frequencies and kHz QPOs of Neutron
Stars in LMXBs | 4 pages, 2 figures, accepted for publication in A&A | 2007,A&A,471,381 | 10.1051/0004-6361:20077069 | null | astro-ph | null | We studied the correlations between spin frequencies and kilohertz
quasi-periodic oscillations (kHz QPOs) in neutron star low mass X-ray binaries.
The updated data of kHz QPOs and spin frequencies are statistically analyzed.
We found that when two simultaneous kHz QPOs are present in the power spectrum,
the minimum frequency of upper kHz QPO is at least 1.3 times larger than the
spin frequency, i.e. \nu_{s}<\nu_{2min}/1.3. We also found that the average kHz
QPO peak separation in 6 Atoll sources anti-correlates with the spin frequency
in the form \lan\dn\ran = -(0.19\pm0.05)\ns+(389.40\pm21.67)Hz. If we shifted
this correlation in the direction of the peak separation by a factor of 1.5,
this correlation matches the data points of the two accretion powered
millisecond X-ray pulsars, SAX J1808.4-3658 and XTE J1807-294.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 10:44:12 GMT"
},
{
"version": "v2",
"created": "Fri, 11 May 2007 00:41:53 GMT"
},
{
"version": "v3",
"created": "Mon, 21 May 2007 06:09:51 GMT"
}
] | 2007-08-28T00:00:00 | [
[
"Yin",
"H. X.",
""
],
[
"Zhang",
"C. M.",
""
],
[
"Zhao",
"Y. H.",
""
],
[
"Lei",
"Y. J.",
""
],
[
"Qu",
"J. L.",
""
],
[
"Song",
"L. M.",
""
],
[
"Zhang",
"F.",
""
]
] |
0705.1432 | Rembert Duine | A.S. Nunez, R.A. Duine | Effective temperature and Gilbert damping of a current-driven localized
spin | 8 pages, 2 figures. v2: published version | Phys. Rev. B 77, 054401 (2008) | 10.1103/PhysRevB.77.054401 | null | cond-mat.mes-hall | null | Starting from a model that consists of a semiclassical spin coupled to two
leads we present a microscopic derivation of the Langevin equation for the
direction of the spin. For slowly-changing direction it takes on the form of
the stochastic Landau-Lifschitz-Gilbert equation. We give expressions for the
Gilbert damping parameter and the strength of the fluctuations, including their
bias-voltage dependence. At nonzero bias-voltage the fluctuations and damping
are not related by the fluctuation-dissipation theorem. We find, however, that
in the low-frequency limit it is possible to introduce a voltage-dependent
effective temperature that characterizes the fluctuations in the direction of
the spin, and its transport-steady-state probability distribution function.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 10:56:10 GMT"
},
{
"version": "v2",
"created": "Fri, 11 May 2007 13:29:56 GMT"
},
{
"version": "v3",
"created": "Mon, 4 Feb 2008 08:42:33 GMT"
}
] | 2008-02-04T00:00:00 | [
[
"Nunez",
"A. S.",
""
],
[
"Duine",
"R. A.",
""
]
] |
0705.1433 | Ashoke Sen | Nabamita Banerjee, Dileep P. Jatkar, Ashoke Sen | Adding Charges to N=4 Dyons | LaTeX file, 16 pages | JHEP 0707:024,2007 | 10.1088/1126-6708/2007/07/024 | null | hep-th | null | The spectrum of dyons in a class of N=4 supersymmetric string theories has
been found for a specific set of electric and magnetic charge vectors. We
extend the analysis to more general charge vectors by considering various
charge carrying collective excitations of the original system.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:00:08 GMT"
}
] | 2009-04-22T00:00:00 | [
[
"Banerjee",
"Nabamita",
""
],
[
"Jatkar",
"Dileep P.",
""
],
[
"Sen",
"Ashoke",
""
]
] |
0705.1434 | Morihiko Saito | Morihiko Saito | On b-function, spectrum and multiplier ideals | 20 pages, to appear in the proceedings of the Kashiwara conference at
RIMS 2007 | null | null | null | math.AG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a survey on b-function, spectrum, and multiplier ideals together with
certain interesting relations among them including the case of arbitrary
subvarieties.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:06:05 GMT"
},
{
"version": "v2",
"created": "Wed, 16 May 2007 10:32:30 GMT"
},
{
"version": "v3",
"created": "Tue, 29 May 2007 11:48:54 GMT"
},
{
"version": "v4",
"created": "Mon, 7 Jan 2008 14:11:34 GMT"
},
{
"version": "v5",
"created": "Sun, 21 Sep 2008 13:24:38 GMT"
}
] | 2008-09-21T00:00:00 | [
[
"Saito",
"Morihiko",
""
]
] |
0705.1435 | Pierre Collet | P.Collet S.Martinez | Asymptotic velocity of one dimensional diffusions with periodic drift | null | null | null | null | math.PR math.AP q-bio.SC | null | We consider the asymptotic behaviour of the solution of one dimensional
stochastic differential equations and Langevin equations in periodic
backgrounds with zero average. We prove that in several such models, there is
generically a non vanishing asymptotic velocity, despite of the fact that the
average of the background is zero.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:24:14 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Martinez",
"P. Collet S.",
""
]
] |
0705.1436 | Isabel Fernandez | Isabel Fernandez, Pablo Mira | Holomorphic quadratic differentials and the Bernstein problem in
Heisenberg space | 17 pages, 1 figure, revised version | null | null | null | math.DG | null | We classify the entire minimal vertical graphs in the 3 dimensional
Heisenberg group Nil endowed with a Riemannian left-invariant metric. This
classification, which provides a solution to the Bernstein problem in Nil, is
given in terms of the Abresch-Rosenberg holomorphic differential for minimal
surfaces in Nil.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:23:22 GMT"
},
{
"version": "v2",
"created": "Tue, 9 Oct 2007 11:36:00 GMT"
}
] | 2007-10-09T00:00:00 | [
[
"Fernandez",
"Isabel",
""
],
[
"Mira",
"Pablo",
""
]
] |
0705.1437 | Filipe Abdalla B. | F. B. Abdalla, A. Amara, P. Capak, E. S. Cypriano, O. Lahav, J. Rhodes | Photo-z for weak lensing tomography from space: the role of optical and
near-IR photometry | 21 pages, accepted MNRAS | Mon.Not.Roy.Astron.Soc.387:969-986,2008 | 10.1111/j.1365-2966.2008.13151.x | null | astro-ph | null | We study in detail the photometric redshift requirements needed for
tomographic weak gravitational lensing in order to measure accurately the Dark
Energy equation of state. In particular, we examine how ground-based photometry
(u,g,r,i,z,y) can be complemented by space-based near-infrared (IR) photometry
(J,H), e.g. on board the planned DUNE satellite. Using realistic photometric
redshift simulations and an artificial neural network photo-z method we
evaluate the Figure of Merit for the Dark Energy parameters $(w_0, w_a)$. We
consider a DUNE-like broad optical filter supplemented with ground-based
multi-band optical data from surveys like the Dark Energy Survey, Pan-STARRS
and LSST. We show that the Dark Energy Figure of Merit would improved by a
factor of 1.3 to 1.7 if IR filters are added on board DUNE. Furthermore we show
that with IR data catastrophic photo-z outliers can be removed effectively.
There is an interplay between the choice of filters, the magnitude limits and
the removal of outliers. We draw attention to the dependence of the results on
the galaxy formation scenarios encoded into the mock galaxies, e.g the galaxy
reddening. For example, deep u band data could be as effective as the IR. We
also find that about $10^5-10^6$ spectroscopic redshifts are needed for
calibration of the full survey.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:19:36 GMT"
},
{
"version": "v2",
"created": "Tue, 8 Apr 2008 13:48:20 GMT"
}
] | 2009-12-15T00:00:00 | [
[
"Abdalla",
"F. B.",
""
],
[
"Amara",
"A.",
""
],
[
"Capak",
"P.",
""
],
[
"Cypriano",
"E. S.",
""
],
[
"Lahav",
"O.",
""
],
[
"Rhodes",
"J.",
""
]
] |
0705.1438 | Jerome Lesueur | M. Sirena, N. Bergeal, J. Lesueur, G. Faini, R. Bernard, J. Briatico,
D. G. Crete and J.P. Contour | Study and optimization of ion-irradiated High-Tc Josephson nanoJunctions
by Monte Carlo simulations | 14 pages, 6 Figures. accepted in Journal of Applied Physics | null | 10.1063/1.2737386 | null | cond-mat.supr-con | null | High Tc Josephson nanoJunctions (HTc JnJ) made by ion irradiation have
remarkable properties for technological applications. However, the spread in
their electrical characteristics increases with the ion dose. We present a
simple model to explain the JnJ inhomogeneities, which accounts quantitatively
for experimental data. The spread in the slit's width of the irradiation mask
is the limiting factor.Monte Carlo simulations have been performed using
different irradiation conditions to study their influence on the spread of the
JnJ charcateristics. A "universal" behavior has been evidenced, which allows to
propose new strategies to optimize JnJ reproducibility.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:31:42 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Sirena",
"M.",
""
],
[
"Bergeal",
"N.",
""
],
[
"Lesueur",
"J.",
""
],
[
"Faini",
"G.",
""
],
[
"Bernard",
"R.",
""
],
[
"Briatico",
"J.",
""
],
[
"Crete",
"D. G.",
""
],
[
"Contour",
"J. P.",
""
]
] |
0705.1439 | Peter Meikle | W. P. S. Meikle (1), S. Mattila (2), A. Pastorello (2), C. L. Gerardy
(1), R. Kotak (2), J. Sollerman (3), S. D. van Dyk (4), D. Farrah (5), A. V.
Filippenko (6), P. H\"oflich (7) P. Lundqvist (8), M. Pozzo (9), J. C.
Wheeler (10) ((1) Imperial College London, (2) Queen's University Belfast,
(3) University of Copenhagen, (4) Spitzer Science Center/Caltech (5) Cornell
University, (6) University of California, Berkeley, (7) Florida State
University (8) Stockholm University (9) University College London (10) The
University of Texas at Austin) | A Spitzer Space Telescope Study of SN 2003gd: Still No Direct Evidence
that Core-Collapse Supernovae are Major Dust Factories | 26 pages, 2 figures, 2 tables, accepted for publication in
Astrophysical Journal | Astrophys.J.665:608-617,2007 | 10.1086/519733 | null | astro-ph | null | We present a new, detailed analysis of late-time mid-infrared (IR)
observations of the Type II-P supernova (SN) 2003gd. At about 16 months after
the explosion, the mid-IR flux is consistent with emission from 4 x 10^(-5)
M(solar) of newly condensed dust in the ejecta. At 22 months emission from
point-like sources close to the SN position was detected at 8 microns and 24
microns. By 42 months the 24 micron flux had faded. Considerations of
luminosity and source size rule out the ejecta of SN 2003gd as the main origin
of the emission at 22 months. A possible alternative explanation for the
emission at this later epoch is an IR echo from pre-existing circumstellar or
interstellar dust. We conclude that, contrary to the claim of Sugerman et al.
(2006, Science, 313, 196), the mid-IR emission from SN 2003gd does not support
the presence of 0.02 M(solar) of newly formed dust in the ejecta. There is, as
yet, no direct evidence that core-collapse supernovae are major dust factories.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:35:21 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Meikle",
"W. P. S.",
""
],
[
"Mattila",
"S.",
""
],
[
"Pastorello",
"A.",
""
],
[
"Gerardy",
"C. L.",
""
],
[
"Kotak",
"R.",
""
],
[
"Sollerman",
"J.",
""
],
[
"van Dyk",
"S. D.",
""
],
[
"Farrah",
"D.",
""
],
[
"Filippenko",
"A. V.",
""
],
[
"Höflich",
"P.",
""
],
[
"Lundqvist",
"P.",
""
],
[
"Pozzo",
"M.",
""
],
[
"Wheeler",
"J. C.",
""
]
] |
0705.1440 | Marius Buliga | Marius Buliga | Contractible groups and linear dilatation structures | larger, updated version | null | null | null | math.GR math.MG | null | A dilatation structure on a metric space, arXiv:math/0608536v4, is a notion
in between a group and a differential structure, accounting for the approximate
self-similarity of the metric space.
The basic objects of a dilatation structure are dilatations (or
contractions). The axioms of a dilatation structure set the rules of
interaction between different dilatations.
Linearity is also a property which can be explained with the help of a
dilatation structure. In this paper we show that we can speak about two kinds
of linearity: the linearity of a function between two dilatation structures and
the linearity of the dilatation structure itself.
Our main result here is a characterization of contractible groups in terms of
dilatation structures. To a normed conical group (normed contractible group) we
can naturally associate a linear dilatation structure. Conversely, any linear
and strong dilatation structure comes from the dilatation structure of a normed
contractible group.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:39:52 GMT"
},
{
"version": "v2",
"created": "Tue, 29 May 2007 10:55:32 GMT"
},
{
"version": "v3",
"created": "Wed, 6 Jun 2007 11:19:02 GMT"
}
] | 2007-06-06T00:00:00 | [
[
"Buliga",
"Marius",
""
]
] |
0705.1441 | Stephan Rosswog | S. Rosswog and D. Price | MAGMA: a 3D, Lagrangian magnetohydrodynamics code for merger
applications | 18 pages, 17 Figures, a high resolution copy of the paper can be
found at http://www.faculty.iu-bremen.de/srosswog/MAGMA.pdf | Mon.Not.Roy.Astron.Soc.379:915-931,2007 | 10.1111/j.1365-2966.2007.11984.x | null | astro-ph | null | We present a new, completely Lagrangian magnetohydrodynamics code that is
based on the SPH method. The equations of self-gravitating hydrodynamics are
derived self-consistently from a Lagrangian and account for variable smoothing
length (``grad-h''-) terms in both the hydrodynamic and the gravitational
acceleration equations. The evolution of the magnetic field is formulated in
terms of so-called Euler potentials which are advected with the fluid and thus
guarantee the MHD flux-freezing condition. This formulation is equivalent to a
vector potential approach and therefore fulfills the
$\vec{\nabla}\cdot\vec{B}=0$-constraint by construction. Extensive tests in
one, two and three dimensions are presented. The tests demonstrate the
excellent conservation properties of the code and show the clear superiority of
the Euler potentials over earlier magnetic SPH formulations.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:40:19 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Rosswog",
"S.",
""
],
[
"Price",
"D.",
""
]
] |
0705.1442 | Karlen Gharibyan | Karlen Garnik Gharibyan | Does P=NP? | null | Karlen Gharibyan, Does P=NP?, in Proceedings of the first
international Arm Tech Congress 2007 | null | null | cs.CC | null | This paper has been withdrawn Abstract: This paper has been withdrawn by the
author due to the publication.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:41:26 GMT"
},
{
"version": "v2",
"created": "Sat, 30 Jun 2007 03:41:18 GMT"
}
] | 2013-05-07T00:00:00 | [
[
"Gharibyan",
"Karlen Garnik",
""
]
] |
0705.1443 | Christian Robenhagen Ravnsh{\o}j | Christian Robenhagen Ravnshoj | Embedding Degree of Hyperelliptic Curves with Complex Multiplication | 7 pages | null | null | null | math.AG math.NT | null | Consider the Jacobian of a genus two curve defined over a finite field and
with complex multiplication. In this paper we show that if the l-Sylow subgroup
of the Jacobian is not cyclic, then the embedding degree of the Jacobian with
respect to l is one.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:46:31 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Ravnshoj",
"Christian Robenhagen",
""
]
] |
0705.1444 | Rafael Barrena | R. Barrena, W. Boschin, M. Girardi, M. Spolaor | The dynamical status of the galaxy cluster Abell 115 | Redshift will be available when published in A&A | null | 10.1051/0004-6361:20077407 | null | astro-ph | null | We present the results of a new spectroscopic and photometric survey of the
hot, binary X-ray cluster A115 at z=0.193, containing a radio relic. We combine
galaxy velocity and position information to select 85 galaxies recognized as
cluster members (from 115 galaxies observed at TNG telescope), determine global
dynamical properties and detect substructures. We find that A115 presents
velocity dispersion of sigma_v=1362_{-108}^{+126} km/s. Our analysis confirms
the presence of two structures (A115N and A115S) of cluster--type well
recognizable in the plane of the sky and shows that they differ of ~2000 km/s
in the LOS velocity. We estimate that A115S is slightly dynamically more
important than A115N having sigma_v=900-1100 km/s vs sigma_v=750-850 km/s.
Moreover, we find evidence for two small groups at low velocities. We estimate
a global cluster virial mass of 2.2--3.5 e15 h_70 Msun. Our results agree with
a pre--merging scenario where A115N and A115S are colliding with a LOS impact
velocity Delta v~1600 km/s.The most likely solution to the two--body problem
suggests that the merging axis lies at $\sim 20$ degrees from the plane of the
sky and that the cores will cross after ~0.1 Gyr. The radio relic with its
largest dimension perpendicular to the merging axis is likely connected to this
merger.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:46:45 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Barrena",
"R.",
""
],
[
"Boschin",
"W.",
""
],
[
"Girardi",
"M.",
""
],
[
"Spolaor",
"M.",
""
]
] |
0705.1445 | Thomas Maeke | Rudolf M. Fuechslin, Thomas Maeke, John S. McCaskill | Multipolar Reactive DPD: A Novel Tool for Spatially Resolved Systems
Biology | submitted to CMSB 07 | null | 10.1140/epje/i2009-10482-x | null | q-bio.SC q-bio.CB | null | This article reports about a novel extension of dissipative particle dynamics
(DPD) that allows the study of the collective dynamics of complex chemical and
structural systems in a spatially resolved manner with a combinatorially
complex variety of different system constituents. We show that introducing
multipolar interactions between particles leads to extended membrane structures
emerging in a self-organized manner and exhibiting both the necessary
mechanical stability for transport and fluidity so as to provide a
two-dimensional self-organizing dynamic reaction environment for kinetic
studies in the context of cell biology. We further show that the emergent
dynamics of extended membrane bound objects is in accordance with scaling laws
imposed by physics.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 11:48:41 GMT"
}
] | 2011-12-07T00:00:00 | [
[
"Fuechslin",
"Rudolf M.",
""
],
[
"Maeke",
"Thomas",
""
],
[
"McCaskill",
"John S.",
""
]
] |
0705.1446 | Sebastian Doern | Sebastian Doern, Thomas Thierauf | The Quantum Query Complexity of Algebraic Properties | 13 pages, 0 figures | null | null | null | quant-ph | null | We present quantum query complexity bounds for testing algebraic properties.
For a set S and a binary operation on S, we consider the decision problem
whether $S$ is a semigroup or has an identity element. If S is a monoid, we
want to decide whether S is a group.
We present quantum algorithms for these problems that improve the best known
classical complexity bounds. In particular, we give the first application of
the new quantum random walk technique by Magniez, Nayak, Roland, and Santha
that improves the previous bounds by Ambainis and Szegedy. We also present
several lower bounds for testing algebraic properties.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:02:41 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Doern",
"Sebastian",
""
],
[
"Thierauf",
"Thomas",
""
]
] |
0705.1447 | Markus H. Thoma | Purnendu Chakraborty, Munshi Golam Mustafa, Rajarshi Ray, Markus H.
Thoma | Wakes in a Collisional Quark-Gluon Plasma | 16 pages, 4 figures, high resolution figures available from the
authors, final version to be published in J. Phys. G | J.Phys.G34:2141-2152,2007 | 10.1088/0954-3899/34/10/004 | null | hep-ph nucl-th | null | Wakes created by a parton moving through a static and infinitely extended
quark-gluon plasma are considered. In contrast to former investigations
collisions within the quark-gluon plasma are taken into account using a
transport theoretical approach (Boltzmann equation) with a
Bhatnagar-Gross-Krook collision term. Within this model it is shown that the
wake structure changes significantly compared to the collisionless case.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:03:16 GMT"
},
{
"version": "v2",
"created": "Mon, 27 Aug 2007 14:33:35 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Chakraborty",
"Purnendu",
""
],
[
"Mustafa",
"Munshi Golam",
""
],
[
"Ray",
"Rajarshi",
""
],
[
"Thoma",
"Markus H.",
""
]
] |
0705.1448 | Tom Mackay | Jiajia Cui (University of Edinburgh), Tom G. Mackay (University of
Edinburgh) | On convergence of the extended strong-property-fluctuation theory for
bianisotropic homogenized composites | null | Electromagnetics 27, 495--506, 2007. | null | null | physics.optics | null | The strong-property-fluctuation theory (SPFT) provides a sophisticated means
of estimating the effective constitutive parameters of a homogenized composite
material (HCM), which takes account of the statistical distribution of the
component particles. We present an extended version of the third-order SPFT in
which the component particles are represented as depolarization regions of
nonzero volume. Numerical results are provided for a bianisotropic
homogenization scenario wherein the HCM is a Faraday chiral medium. Thereby,
convergence of the extended SPFT at the second-order level of approximation is
demonstrated within the long-wavelength regime.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:06:52 GMT"
}
] | 2008-03-28T00:00:00 | [
[
"Cui",
"Jiajia",
"",
"University of Edinburgh"
],
[
"Mackay",
"Tom G.",
"",
"University of\n Edinburgh"
]
] |
0705.1449 | Gery Debongnie | G. Debongnie | Rational homotopy type of subspace arrangements with a geometric lattice | 7 pages, to be published in Proceedings of the AMS | null | null | null | math.AT | null | Let A be a subspace arrangement with a geometric lattice such that codim(x) >
1 for every x in A. Using rational homotopy theory, we prove that the
complement M(A) is rationally elliptic if and only if the sum of the orthogonal
subspaces is a direct sum. The homotopy type of M(A) is also given: it is a
product of odd dimensional spheres. Finally, some other equivalent conditions
are given, such as Poincare duality. Those results give a complete description
of arrangements (with geometric lattice and with the codimension condition on
the subspaces) such that M(A) is rationally elliptic, and show that most
arrangements have an hyperbolic complement.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:07:38 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Debongnie",
"G.",
""
]
] |
0705.1450 | Damien Chablat | Mazen Zein (IRCCyN), Philippe Wenger (IRCCyN), Damien Chablat (IRCCyN) | An Algorithm for Computing Cusp Points in the Joint Space of 3-RPR
Parallel Manipulators | null | European Conference on Mechanism Sciences (21/02/2006) 1-12 | null | null | cs.RO | null | This paper presents an algorithm for detecting and computing the cusp points
in the joint space of 3-RPR planar parallel manipulators. In manipulator
kinematics, cusp points are special points, which appear on the singular curves
of the manipulators. The nonsingular change of assembly mode of 3-RPR parallel
manipulators was shown to be associated with the existence of cusp points. At
each of these points, three direct kinematic solutions coincide. In the
literature, a condition for the existence of three coincident direct kinematic
solutions was established, but has never been exploited, because the algebra
involved was too complicated to be solved. The algorithm presented in this
paper solves this equation and detects all the cusp points in the joint space
of these manipulators.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:10:12 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Zein",
"Mazen",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
]
] |
0705.1451 | Gery Debongnie | G. Debongnie | Homotopy Lie algebra of the complements of subspace arrangements with
geometric lattices | 9 pages | null | null | null | math.AT | null | Let A be a geometric arrangement such that codim(x) > 1 for every x in A. We
prove that, if the complement space M(A) is rationally hyperbolic, then there
exists an injective from a free Lie algebra L(u,v) to the homotopy Lie algebra
of M(A).
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:18:38 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Debongnie",
"G.",
""
]
] |
0705.1452 | Gregoire Henry | Gr\'egoire Henry (PPS), Michel Mauny (INRIA Rocquencourt, ENSTA-UMA),
Emmanuel Chailloux (PPS) | Typer la d\'e-s\'erialisation sans s\'erialiser les types | null | Journ\'ee francophone des langages applicatifs (JFLA) 2006
(01/2006) | null | null | cs.PL | null | In this paper, we propose a way of assigning static type information to
unmarshalling functions and we describe a verification technique for
unmarshalled data that preserves the execution safety provided by static type
checking. This technique, whose correctness is proven, relies on singleton
types whose values are transmitted to unmarshalling routines at runtime, and on
an efficient checking algorithm able to deal with sharing and cycles.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:19:51 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Henry",
"Grégoire",
"",
"PPS"
],
[
"Mauny",
"Michel",
"",
"INRIA Rocquencourt, ENSTA-UMA"
],
[
"Chailloux",
"Emmanuel",
"",
"PPS"
]
] |
0705.1453 | Jerome Darmont | J\'er\^ome Darmont (ERIC), Fadila Bentayeb (ERIC), Omar Boussa\"id
(ERIC) | DWEB: A Data Warehouse Engineering Benchmark | null | LNCS, Vol. 3589 (08/2005) 85-94 | null | null | cs.DB | null | Data warehouse architectural choices and optimization techniques are critical
to decision support query performance. To facilitate these choices, the
performance of the designed data warehouse must be assessed. This is usually
done with the help of benchmarks, which can either help system users comparing
the performances of different systems, or help system engineers testing the
effect of various design choices. While the TPC standard decision support
benchmarks address the first point, they are not tuneable enough to address the
second one and fail to model different data warehouse schemas. By contrast, our
Data Warehouse Engineering Benchmark (DWEB) allows to generate various ad-hoc
synthetic data warehouses and workloads. DWEB is fully parameterized to fulfill
data warehouse design needs. However, two levels of parameterization keep it
relatively easy to tune. Finally, DWEB is implemented as a Java free software
that can be interfaced with most existing relational database management
systems. A sample usage of DWEB is also provided in this paper.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:23:35 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Darmont",
"Jérôme",
"",
"ERIC"
],
[
"Bentayeb",
"Fadila",
"",
"ERIC"
],
[
"Boussaïd",
"Omar",
"",
"ERIC"
]
] |
0705.1454 | Jerome Darmont | Zhen He, J\'er\^ome Darmont (ERIC) | DOEF: A Dynamic Object Evaluation Framework | null | LNCS, Vol. 2736 (09/2003) 662-671 | null | null | cs.DB | null | In object-oriented or object-relational databases such as multimedia
databases or most XML databases, access patterns are not static, i.e.,
applications do not always access the same objects in the same order
repeatedly. However, this has been the way these databases and associated
optimisation techniques like clustering have been evaluated up to now. This
paper opens up research regarding this issue by proposing a dynamic object
evaluation framework (DOEF) that accomplishes access pattern change by defining
configurable styles of change. This preliminary prototype has been designed to
be open and fully extensible. To illustrate the capabilities of DOEF, we used
it to compare the performances of four state of the art dynamic clustering
algorithms. The results show that DOEF is indeed effective at determining the
adaptability of each dynamic clustering algorithm to changes in access pattern.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:24:27 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"He",
"Zhen",
"",
"ERIC"
],
[
"Darmont",
"Jérôme",
"",
"ERIC"
]
] |
0705.1455 | Jerome Darmont | Fadila Bentayeb (ERIC), J\'er\^ome Darmont (ERIC) | Decision tree modeling with relational views | null | LNAI, Vol. 2366 (06/2002) 423-431 | null | null | cs.DB | null | Data mining is a useful decision support technique that can be used to
discover production rules in warehouses or corporate data. Data mining research
has made much effort to apply various mining algorithms efficiently on large
databases. However, a serious problem in their practical application is the
long processing time of such algorithms. Nowadays, one of the key challenges is
to integrate data mining methods within the framework of traditional database
systems. Indeed, such implementations can take advantage of the efficiency
provided by SQL engines. In this paper, we propose an integrating approach for
decision trees within a classical database system. In other words, we try to
discover knowledge from relational databases, in the form of production rules,
via a procedure embedding SQL queries. The obtained decision tree is defined by
successive, related relational views. Each view corresponds to a given
population in the underlying decision tree. We selected the classical Induction
Decision Tree (ID3) algorithm to build the decision tree. To prove that our
implementation of ID3 works properly, we successfully compared the output of
our procedure with the output of an existing and validated data mining
software, SIPINA. Furthermore, since our approach is tuneable, it can be
generalized to any other similar decision tree-based method.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:25:57 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Bentayeb",
"Fadila",
"",
"ERIC"
],
[
"Darmont",
"Jérôme",
"",
"ERIC"
]
] |
0705.1456 | Jerome Darmont | J\'er\^ome Darmont (ERIC), Omar Boussa\"id (ERIC), Fadila Bentayeb
(ERIC) | Warehousing Web Data | null | 4th International Conference on Information Integration and
Web-based Applications and Services (iiWAS 02) (09/2002) 148-152 | null | null | cs.DB | null | In a data warehousing process, mastering the data preparation phase allows
substantial gains in terms of time and performance when performing
multidimensional analysis or using data mining algorithms. Furthermore, a data
warehouse can require external data. The web is a prevalent data source in this
context. In this paper, we propose a modeling process for integrating diverse
and heterogeneous (so-called multiform) data into a unified format.
Furthermore, the very schema definition provides first-rate metadata in our
data warehousing context. At the conceptual level, a complex object is
represented in UML. Our logical model is an XML schema that can be described
with a DTD or the XML-Schema language. Eventually, we have designed a Java
prototype that transforms our multiform input data into XML documents
representing our physical model. Then, the XML documents we obtain are mapped
into a relational database we view as an ODS (Operational Data Storage), whose
content will have to be re-modeled in a multidimensional way to allow its
storage in a star schema-based warehouse and, later, its analysis.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:28:52 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Darmont",
"Jérôme",
"",
"ERIC"
],
[
"Boussaïd",
"Omar",
"",
"ERIC"
],
[
"Bentayeb",
"Fadila",
"",
"ERIC"
]
] |
0705.1457 | Jerome Darmont | Sami Miniaoui (ERIC), J\'er\^ome Darmont (ERIC), Omar Boussa\"id
(ERIC) | Web data modeling for integration in data warehouses | null | First International Workshop on Multimedia Data and Document
Engineering (MDDE 01) (07/2001) 88-97 | null | null | cs.DB | null | In a data warehousing process, the data preparation phase is crucial.
Mastering this phase allows substantial gains in terms of time and performance
when performing a multidimensional analysis or using data mining algorithms.
Furthermore, a data warehouse can require external data. The web is a prevalent
data source in this context, but the data broadcasted on this medium are very
heterogeneous. We propose in this paper a UML conceptual model for a complex
object representing a superclass of any useful data source (databases, plain
texts, HTML and XML documents, images, sounds, video clips...). The translation
into a logical model is achieved with XML, which helps integrating all these
diverse, heterogeneous data into a unified format, and whose schema definition
provides first-rate metadata in our data warehousing context. Moreover, we
benefit from XML's flexibility, extensibility and from the richness of the
semi-structured data model, but we are still able to later map XML documents
into a database if more structuring is needed.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:30:19 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Miniaoui",
"Sami",
"",
"ERIC"
],
[
"Darmont",
"Jérôme",
"",
"ERIC"
],
[
"Boussaïd",
"Omar",
"",
"ERIC"
]
] |
0705.1458 | Gregoire Henry | Emmanuel Chailloux (PPS), Gr\'egoire Henry (PPS), Rapha\"el
Montelatici (PPS) | Mixing the Objective Caml and C# Programming Models in the .Net
Framework | null | Workshop on MULTIPARADIGM PROGRAMMING WITH OO LANGUAGES (MPOOL),
Norv\`ege (06/2004) | null | null | cs.PL | null | We present a new code generator, called O'Jacare.net, to inter-operate
between C# and Objective Caml through their object models. O'Jacare.net defines
a basic IDL (Interface Definition Language) that describes classes and
interfaces in order to communicate between Objective Caml and C#. O'Jacare.net
generates all needed wrapper classes and takes advantage of static type
checking in both worlds. Although the IDL intersects these two object models,
O'Jacare.net allows to combine features from both.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:31:17 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Chailloux",
"Emmanuel",
"",
"PPS"
],
[
"Henry",
"Grégoire",
"",
"PPS"
],
[
"Montelatici",
"Raphaël",
"",
"PPS"
]
] |
0705.1459 | George Lukes Gerakopoulos | G. Lukes-Gerakopoulos, N. Voglis, C. Efthymiopoulos | The production of Tsallis entropy in the limit of weak chaos and a new
indicator of chaoticity | 19 pages, 12 figures, accepted for publication by Physica A | PhysA Vol 387/8-9 pp 1907-1925 | 10.1016/j.physa.2007.11.024 | null | nlin.CD | null | We study the connection between the appearance of a `metastable' behavior of
weakly chaotic orbits, characterized by a constant rate of increase of the
Tsallis q-entropy (Tsallis 1988), and the solutions of the variational
equations of motion for the same orbits. We demonstrate that the variational
equations yield transient solutions, lasting for long time intervals, during
which the length of deviation vectors of nearby orbits grows in time almost as
a power-law. The associated power exponent can be simply related to the
entropic exponent for which the q-entropy exhibits a constant rate of increase.
This analysis leads to the definition of a new sensitive indicator
distinguishing regular from weakly chaotic orbits, that we call `Average Power
Law Exponent' (APLE). We compare the APLE with other established indicators of
the literature. In particular, we give examples of application of the APLE in
a) a thin separatrix layer of the standard map, b) the stickiness region around
an island of stability in the same map, and c) the web of resonances of a 4D
symplectic map. In all these cases we identify weakly chaotic orbits exhibiting
the `metastable' behavior associated with the Tsallis q-entropy.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:57:43 GMT"
},
{
"version": "v2",
"created": "Fri, 16 Nov 2007 15:38:33 GMT"
},
{
"version": "v3",
"created": "Wed, 9 Jan 2008 10:51:58 GMT"
}
] | 2011-11-09T00:00:00 | [
[
"Lukes-Gerakopoulos",
"G.",
""
],
[
"Voglis",
"N.",
""
],
[
"Efthymiopoulos",
"C.",
""
]
] |
0705.1460 | Thomas Maeke | Rudolf M. Fuechslin, Thomas Maeke, Uwe Tangen, John S. McCaskill | Evolving inductive generalization via genetic self-assembly | null | Adv. Complex Syst., Vol. 9, Nos. 1&2 (2006) 1-29 | null | null | q-bio.PE q-bio.OT | null | We propose that genetic encoding of self-assembling components greatly
enhances the evolution of complex systems and provides an efficient platform
for inductive generalization, i.e. the inductive derivation of a solution to a
problem with a potentially infinite number of instances from a limited set of
test examples. We exemplify this in simulations by evolving scalable circuitry
for several problems. One of them, digital multiplication, has been intensively
studied in recent years, where hitherto the evolutionary design of only
specific small multipliers was achieved. The fact that this and other problems
can be solved in full generality employing self-assembly sheds light on the
evolutionary role of self-assembly in biology and is of relevance for the
design of complex systems in nano- and bionanotechnology.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:40:14 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Fuechslin",
"Rudolf M.",
""
],
[
"Maeke",
"Thomas",
""
],
[
"Tangen",
"Uwe",
""
],
[
"McCaskill",
"John S.",
""
]
] |
0705.1461 | Damiano Testa | M. Marietti, D. Testa | A simple uniform approach to complexes arising from forests | 13 pages. Comments very welcome | null | null | null | math.CO math.AT | null | In this paper we present a unifying approach to study the homotopy type of
several complexes arising from forests. We show that this method applies
uniformly to many complexes that have been extensively studied.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:42:45 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Marietti",
"M.",
""
],
[
"Testa",
"D.",
""
]
] |
0705.1462 | Igor Guryev V | I. A. Sukhoivanov, I. V. Guryev, O. V. Shulika, A. V. Kublyk, O. V.
Mashoshina, E. Alvarado Mendez, J. A. Andrade-Lucio | Design of the photonic crystal demultiplexers for ultra-short optical
pulses using the gap-maps analysis | null | Journal of Optoelectronics and Advanced Materials, Vol. 8, No. 4,
pp. 1626-1630 August (2006) | null | null | physics.optics | null | In the work, the new method for the design of the wavelength division
multiplexer on the basis of 2D photonic crystal integrated circuit for the
ultra-short pulses channel separation is proposed and investigated. The method
is based on the analysis of full photonic bandgap maps that allows defining the
ultra-short pulse demultiplexer parameters selection. For the method
approbation, there was synthesized the device in which the wideband filters are
used for the channel separation. As it was expected, the device effectively
separates 50 fs pulse channels with 1.31 and 1.55 microns wavelengths. The
obtained spectral characteristics and pulse pattern responses validate the
efficiency of the proposed method and the applicability of such devices to the
integrated photonic information processing circuits.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:55:47 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Sukhoivanov",
"I. A.",
""
],
[
"Guryev",
"I. V.",
""
],
[
"Shulika",
"O. V.",
""
],
[
"Kublyk",
"A. V.",
""
],
[
"Mashoshina",
"O. V.",
""
],
[
"Mendez",
"E. Alvarado",
""
],
[
"Andrade-Lucio",
"J. A.",
""
]
] |
0705.1463 | Martin Oettel | D. Frydel, S. Dietrich, and M. Oettel | Charge renormalization for effective interactions of colloids at water
interfaces | 4 pages | Phys. Rev. Lett. 99, 118302 (2007). | 10.1103/PhysRevLett.99.118302 | null | cond-mat.soft | null | We analyze theoretically the electrostatic interaction of surface-charged
colloids at water interfaces with special attention to the experimentally
relevant case of large charge densities on the colloid-water interface. Whereas
linear theory predicts an effective dipole potential the strength of which is
proportional to the square of the product of charge density and screening
length, nonlinear charge renormalization effects change this dependence to a
weakly logarithmic one. These results appear to be particularly relevant for
structure formation at air-water interfaces with arbitrarily shaped colloids.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:55:51 GMT"
}
] | 2007-11-13T00:00:00 | [
[
"Frydel",
"D.",
""
],
[
"Dietrich",
"S.",
""
],
[
"Oettel",
"M.",
""
]
] |
0705.1464 | Pavol Schwartz | P. Heinzel (Astronomical Institute AS, Ondrejov, Czech Republic) | The Fine Structure of Solar Prominences | In press,"Physics of Chromospheric Plasmas" (Coimbra), ASP 368, 271
(2007) | null | null | null | astro-ph | null | Solar prominences and filaments (prominences projected against the solar
disk) exhibit a large variety of fine structures which are well observed down
to the resolution limit of ground-based telescopes. We describe the
morphological aspects of these fine structures which basically depend on the
type of a prominence (quiescent or active-region). Then we review current
theoretical scenarios which are aimed at explaining the nature of these
structures. In particular we discuss in detail the relative roles of magnetic
pressure and gas pressure (i.e., the value of the plasma-beta), as well as the
dynamical aspects of the fine structures. Special attention is paid to recent
numerical simulations which include a complex magnetic topology, energy balance
(heating and cooling processes), as well as the multidimensional radiative
transfer. Finally, we also show how new ground-based and space observations can
reveal various physical aspects of the fine structures including their
prominence-corona transition regions in relation to the orientation of the
magnetic field.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:56:21 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Heinzel",
"P.",
"",
"Astronomical Institute AS, Ondrejov, Czech Republic"
]
] |
0705.1465 | Nilanjana Datta | Nilanjana Datta, Yurii Suhov and Tony C. Dorlas | Entanglement Assisted Classical Capacity of a Class of Quantum Channels
with Long-Term Memory | Published version; 13 pages | Quantum Information Processing, vol.7, no.6, pp. 251-262, 2008 | null | null | quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we evaluate the entanglement assisted classical capacity of a
class of quantum channels with long-term memory, which are convex combinations
of memoryless channels. The memory of such channels can be considered to be
given by a Markov chain which is aperiodic but not irreducible.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:58:39 GMT"
},
{
"version": "v2",
"created": "Wed, 30 Sep 2009 13:35:20 GMT"
}
] | 2009-09-30T00:00:00 | [
[
"Datta",
"Nilanjana",
""
],
[
"Suhov",
"Yurii",
""
],
[
"Dorlas",
"Tony C.",
""
]
] |
0705.1466 | Dominik Heiss | D. Heiss (1), S. Schaeck (1), H. Huebl (1), M. Bichler (1), G.
Abstreiter (1), J. J. Finley (1) D. V. Bulaev (2), Daniel Loss (2) ((1)
Walter Schottky Institut, Technische Universit\"at M\"unchen, (2) Department
of Physics and Astronomy, University of Basel) | Observation of extremely slow hole spin relaxation in self-assembled
quantum dots | Published by Physical Review B | Phys. Rev. B 76, 241306(R) (2007) | 10.1103/PhysRevB.76.241306 | null | cond-mat.mes-hall | null | We report the measurement of extremely slow hole spin relaxation dynamics in
small ensembles of self-assembled InGaAs quantum dots. Individual spin
orientated holes are optically created in the lowest orbital state of each dot
and read out after a defined storage time using spin memory devices. The
resulting luminescence signal exhibits a pronounced polarization memory effect
that vanishes for long storage times. The hole spin relaxation dynamics are
measured as a function of external magnetic field and lattice temperature. We
show that hole spin relaxation can occur over remarkably long timescales in
strongly confined quantum dots (up to ~270 us), as predicted by recent theory.
Our findings are supported by calculations that reproduce both the observed
magnetic field and temperature dependencies. The results suggest that hole spin
relaxation in strongly confined quantum dots is due to spin orbit mediated
phonon scattering between Zeeman levels, in marked contrast to higher
dimensional nanostructures where it is limited by valence band mixing.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:04:17 GMT"
},
{
"version": "v2",
"created": "Tue, 31 Jul 2007 10:35:29 GMT"
},
{
"version": "v3",
"created": "Fri, 30 Nov 2007 11:03:20 GMT"
},
{
"version": "v4",
"created": "Mon, 25 Feb 2008 08:29:58 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Heiss",
"D.",
""
],
[
"Schaeck",
"S.",
""
],
[
"Huebl",
"H.",
""
],
[
"Bichler",
"M.",
""
],
[
"Abstreiter",
"G.",
""
],
[
"Finley",
"J. J.",
""
],
[
"Bulaev",
"D. V.",
""
],
[
"Loss",
"Daniel",
""
]
] |
0705.1467 | Martin Greiter | Martin Greiter and Dirk Schuricht | Many-spinon states and the secret significance of Young tableaux | 4 pages, 3 figures | Phys. Rev. Lett. 98, 237202 (2007) | 10.1103/PhysRevLett.98.237202 | null | cond-mat.str-el math-ph math.MP | null | We establish a one-to-one correspondence between the Young tableaux
classifying the total spin representations of N spins and the exact eigenstates
of the the Haldane-Shastry model for a chain with N sites classified by the
total spins and the fractionally spaced single-particle momenta of the spinons.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:04:25 GMT"
}
] | 2011-11-09T00:00:00 | [
[
"Greiter",
"Martin",
""
],
[
"Schuricht",
"Dirk",
""
]
] |
0705.1468 | Paul Sutcliffe | Paul Sutcliffe | Knots in the Skyrme-Faddeev model | 21 pages, 5 figures | Proc.Roy.Soc.Lond.A463:3001-3020,2007 | 10.1098/rspa.2007.0038 | null | hep-th | null | The Skyrme-Faddeev model is a modified sigma model in three-dimensional
space, which has string-like topological solitons classified by the
integer-valued Hopf charge. Numerical simulations are performed to compute
soliton solutions for Hopf charges up to sixteen, with initial conditions
provided by families of rational maps from the three-sphere into the complex
projective line. A large number of new solutions are presented, including a
variety of torus knots for a range of Hopf charges. Often these knots are only
local energy minima, with the global minimum being a linked solution, but for
some values of the Hopf charge they are good candidates for the global minimum
energy solution. The computed energies are in agreement with Ward's conjectured
energy bound.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:05:58 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Sutcliffe",
"Paul",
""
]
] |
0705.1469 | Plamen Iliev | Jeffrey S. Geronimo and Plamen Iliev | Bispectrality of multivariable Racah-Wilson polynomials | minor corrections | Constr. Approx. 31 (2010), no. 3, 417--457 | 10.1007/s00365-009-9045-3 | null | math.CA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a commutative algebra A_x of difference operators in R^p,
depending on p+3 real parameters which is diagonalized by the multivariable
Racah polynomials R_p(n;x) considered by Tratnik [27]. It is shown that for
specific values of the variables x=(x_1,x_2,...,x_p) there is a hidden duality
between n and x. Analytic continuation allows us to construct another
commutative algebra A_n in the variables n=(n_1,n_2,...,n_p) which is also
diagonalized by R_p(n;x). Thus R_p(n;x) solve a multivariable discrete
bispectral problem in the sense of Duistermaat and Grunbaum [8]. Since a change
of the variables and the parameters in the Racah polynomials gives the
multivariable Wilson polynomials [26], this change of variables and parameters
in A_x and A_n leads to bispectral commutative algebras for the multivariable
Wilson polynomials.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 18:11:53 GMT"
},
{
"version": "v2",
"created": "Wed, 8 Oct 2008 20:35:13 GMT"
},
{
"version": "v3",
"created": "Wed, 4 Mar 2009 19:28:23 GMT"
}
] | 2012-05-08T00:00:00 | [
[
"Geronimo",
"Jeffrey S.",
""
],
[
"Iliev",
"Plamen",
""
]
] |
0705.1470 | Manfred Bohn | Manfred Bohn, Dieter W. Heermann and Roel van Driel | A Random Loop Model for Long Polymers | 8 pages, 7 figures; major changes: added paragraph with calculation
of the annealed ensemble | Phys. Ref. E (76) 051805, 2007 | 10.1103/PhysRevE.76.051805 | null | cond-mat.soft | null | While the structure of chromatin has been studied in great detail on length
scales below 30 nm, amazingly little is known about the higher-order folding
motifs of chromatin in interphase. Recent experiments give evidence that the
folding may depend locally on gene density and transcriptional activity and
show a leveling-off at long distances where approximately $<R^2> \sim O(1)$. We
propose a new model that can explain this leveling-off by the formation of
random loops. We derive an analytical expression for the mean square
displacement between two beads where the average is taken over the thermal
ensemble with a fixed but random loop configuration, while quenched averaging
over the ensemble of different loop configurations -- which turns out to be
equivalent to averaging over an ensemble of random matrices -- is performed
numerically. A detailed investigation of this model shows that loops on all
scales are necessary to fit experimental data.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:28:16 GMT"
},
{
"version": "v2",
"created": "Fri, 6 Jul 2007 12:48:12 GMT"
},
{
"version": "v3",
"created": "Fri, 12 Oct 2007 11:13:15 GMT"
}
] | 2009-02-16T00:00:00 | [
[
"Bohn",
"Manfred",
""
],
[
"Heermann",
"Dieter W.",
""
],
[
"van Driel",
"Roel",
""
]
] |
0705.1471 | Simone Bianchi | Simone Bianchi | The dust distribution in edge-on galaxies. Radiative transfer fits of V
and K'-band images | A&A accepted, 22 pages, including 13 pages of "Online Material", 16
figures | null | 10.1051/0004-6361:20077649 | null | astro-ph | null | Aims: I have analyzed a sample of seven nearby edge-on galaxies observed in
the V and K'-band, in order to infer the properties of the dust distribution.
Methods: A radiative transfer model, including scattering, have been used to
decompose each image into a stellar disk, a bulge, and a dust disk. The
parameters describing the distributions have been obtained through standard X^2
minimization techniques.
Results: The dust disks fitted to the V-band images are consistent with
previous work in literature: the radial scalelength of dust is larger than that
for stars (h_d/h_s ~ 1.5); the dust disk has a smaller vertical scalelength
than the stellar (z_d/z_s ~ 1/3); the dust disk is almost transparent when seen
face-on (central, face-on, optical depth tau_0 =0.5-1.5). Faster radiative
transfer models which neglect scattering can produce equivalent fits, with
changes in the derived parameters within the accuracy of full fits including
scattering. In the K'-band, no trace is found of a second, massive, dust disk
which has been invoked to explain observations of dust emission in the
submillimeter. I discuss the model degeneracies and the effect of complex
structures on the fitted distributions. In particular, most bulges in the
sample show a box/peanuts morphology with large residuals; two
lower-inclination galaxies show a dust ring distribution, which could be the
cause for the large fitted dust scalelengths.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 12:35:22 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Bianchi",
"Simone",
""
]
] |
0705.1472 | Sunao Shimizu | S. Shimizu (1), H. Mukuda (1), Y. Kitaoka (1), A. Iyo (2), Y. Tanaka
(2), Y. Kodama (2), K. Tokiwa (3) and T. Watanabe (3) | Uniform Mixing of Antiferromagnetism and High-Tc Superconductivity in
Electron-doped Layers in Four-layered Ba2Ca3Cu4O8F2 : A New Phenomenon in an
Electron Underdoped RegimePhenomenon in an Electron Underdoped Regime | 4 pages | null | 10.1103/PhysRevLett.98.257002 | null | cond-mat.supr-con cond-mat.str-el | null | We report Cu- and F-NMR studies on a four-layered high-temperature
superconductor Ba2Ca3Cu4O8F2(0234F(2.0)) with apical fluorine (F-1), an undoped
55 K-superconductor with a nominal Cu2+ valence on average. We reveal that this
compound exhibits the antiferromagnetism (AFM) with a Neel temperature TN=100 K
despite being a Tc= 55 K-superconductor. Through a comparison with a related
tri-layered cuprate Ba2Ca2Cu3O6F2 (0223F(2.0)), it is demonstrated that
electrons are transferred from the inner plane (IP) to the outer plane (OP) in
0234F(2.0) and 0223F(2.0), confirming the self-doped high-temperature
superconductivity (HTSC) having electron and hole doping in a single compound.
Remarlably, uniform mixing of AFM and HTSC takes place in both the
electron-doped OPs and the hole-doped IPs in 0234F(2.0).
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:38:52 GMT"
},
{
"version": "v2",
"created": "Sun, 20 May 2007 16:11:34 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Shimizu",
"S.",
""
],
[
"Mukuda",
"H.",
""
],
[
"Kitaoka",
"Y.",
""
],
[
"Iyo",
"A.",
""
],
[
"Tanaka",
"Y.",
""
],
[
"Kodama",
"Y.",
""
],
[
"Tokiwa",
"K.",
""
],
[
"Watanabe",
"T.",
""
]
] |
0705.1473 | Peter Kammel | V.A. Ganzha, P.A. Kravtsov, O.E. Maev, G.N. Schapkin, G.G. Semenchuk,
V. Trofimov, A.A. Vasilyev, M.E. Vznuzdaev, S.M. Clayton, P. Kammel, B.
Kiburg, M. Hildebrandt, C. Petitjean, T.I. Banks, B. Lauss | A Circulating Hydrogen Ultra-High Purification System for the MuCap
Experiment | submitted to Nucl. Instr. Methods Phys. Res. A | Nucl.Instrum.Meth.A578:485-497,2007 | 10.1016/j.nima.2007.06.010 | null | nucl-ex | null | The MuCap experiment is a high-precision measurement of the rate for the
basic electroweak process of muon capture, mu- + p -> n + nu . The experimental
approach is based on an active target consisting of a time projection chamber
(TPC) operating with pure hydrogen gas. The hydrogen has to be kept extremely
pure and at a stable pressure. A Circulating Hydrogen Ultrahigh Purification
System was designed at the Petersburg Nuclear Physics Institute (PNPI) to
continuously clean the hydrogen from impurities. The system is based on an
adsorption cryopump to stimulate the hydrogen flow and on a cold adsorbent for
the hydrogen cleaning. It was installed at the Paul Scherrer Institute (PSI) in
2004 and performed reliably during three experiment runs. During several months
long operating periods the system maintained the hydrogen purity in the
detector on the level of 20 ppb for moisture, which is the main contaminant,
and of better than 7 ppb and 5 ppb for nitrogen and oxygen, respectively. The
pressure inside the TPC was stabilized to within 0.024% of 10 bar at a hydrogen
flow rate of 3 standard liters per minute.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:53:16 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Ganzha",
"V. A.",
""
],
[
"Kravtsov",
"P. A.",
""
],
[
"Maev",
"O. E.",
""
],
[
"Schapkin",
"G. N.",
""
],
[
"Semenchuk",
"G. G.",
""
],
[
"Trofimov",
"V.",
""
],
[
"Vasilyev",
"A. A.",
""
],
[
"Vznuzdaev",
"M. E.",
""
],
[
"Clayton",
"S. M.",
""
],
[
"Kammel",
"P.",
""
],
[
"Kiburg",
"B.",
""
],
[
"Hildebrandt",
"M.",
""
],
[
"Petitjean",
"C.",
""
],
[
"Banks",
"T. I.",
""
],
[
"Lauss",
"B.",
""
]
] |
0705.1474 | Andrea Zoia | A. Zoia, Y. Kantor, M. Kardar | First passage times and distances along critical curves | 5 pages, 5 figures | EPL, 80 (2007) 40006 | 10.1209/0295-5075/80/40006 | null | cond-mat.stat-mech | null | We propose a model for anomalous transport in inhomogeneous environments,
such as fractured rocks, in which particles move only along pre-existing
self-similar curves (cracks). The stochastic Loewner equation is used to
efficiently generate such curves with tunable fractal dimension $d_f$. We
numerically compute the probability of first passage (in length or time) from
one point on the edge of the semi-infinite plane to any point on the
semi-circle of radius $R$. The scaled probability distributions have a variance
which increases with $d_f$, a non-monotonic skewness, and tails that decay
faster than a simple exponential. The latter is in sharp contrast to
predictions based on fractional dynamics and provides an experimental signature
for our model.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:51:04 GMT"
},
{
"version": "v2",
"created": "Tue, 13 Nov 2007 10:37:57 GMT"
}
] | 2007-11-13T00:00:00 | [
[
"Zoia",
"A.",
""
],
[
"Kantor",
"Y.",
""
],
[
"Kardar",
"M.",
""
]
] |
0705.1475 | Wei-Xing Zhou | Zhi-Qiang Jiang, Wei-Xing Zhou (ECUST) | Statistical significance of rich-club phenomena in complex networks | 3 Revtex pages + 5 figures | New Journal of Physics 10 (4), 043002 (2008) | 10.1088/1367-2630/10/4/043002 | null | physics.soc-ph | null | We propose that the rich-club phenomena in complex networks should be defined
in the spirit of bootstrapping, in which a null model is adopted to assess the
statistical significance of the rich-club detected. Our method can be served as
a definition of rich-club phenomenon and is applied to analyzing three real
networks and three model networks. The results improve significantly compared
with previously reported results. We report a dilemma with an exceptional
example, showing that there does not exist an omnipotent definition for the
rich-club phenomenon.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:51:39 GMT"
}
] | 2008-04-05T00:00:00 | [
[
"Jiang",
"Zhi-Qiang",
"",
"ECUST"
],
[
"Zhou",
"Wei-Xing",
"",
"ECUST"
]
] |
0705.1476 | Olga Lalakulich | G. Vereshkov, O.Lalakulich (Research Institute of Physics, Southern
Federal University) | Logarithmic corrections and soft photon phenomenology in the multipole
model of the nucleon form factors | 14 pages in 2-column format, 4 figures, references added, typos
corrected, minor changes in the text, accepted in Eur. Phys. Journal A | Eur.Phys.J.A34:223-236,2007 | 10.1140/epja/i2007-10493-3 | null | hep-ph | null | We analyzed the presently available experimental data on nucleon
electromagnetic form factors within a multipole model based on dispersion
relations. A good fit of the data is achieved by considering the coefficients
of the multipole expansions as logarithmic functions of the momentum transfer
squared. The superconvergence relations, applied to this coefficients, makes
the model agree with unitary constraints and pQCD asymptotics for the Dirac and
Pauli form factors. The soft photon emission is proposed as a mechanism
responsible for the difference between the Rosenbluth, polarization and
beam--target--asymmetry data. It is shown, that the experimentally measured
cross sections depend not only on the Dirac and Pauli form factors, but also on
the average number of the photons emitted. For proton this number is shown to
be different for different types of experimental measurements and then
estimated phenomenologically. For neutron the same mechanism predicts, that the
data form different types of experiments must coincide with high accuracy. A
joint fit of all the experimental data reproduce the $Q^2-$dependence with the
accuracy $\chi^2/dof=0.86$. Predictions of the model, that 1) the ratios of the
proton form factors $G_E/G_M$ are different for Rosenbluth, polarization and
beam--target--asymmetry experiments and 2) similar ratios are nearly the same
for neutron, can be used for experimental verification of the model.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:04:57 GMT"
},
{
"version": "v2",
"created": "Tue, 9 Oct 2007 16:09:46 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Vereshkov",
"G.",
"",
"Research Institute of Physics, Southern\n Federal University"
],
[
"Lalakulich",
"O.",
"",
"Research Institute of Physics, Southern\n Federal University"
]
] |
0705.1477 | Guillaume Adenier | Guillaume Adenier | Quantum entanglement, fair sampling, and reality: Is the moon there when
nobody looks? | 13 pages, 8 Figures, 1 Table | Am. J. Phys. Vol 76, 2, 147-152 (2008) | 10.1119/1.2825326 | null | quant-ph | null | In 1981, David Mermin described a cleverly simplified version of Bell's
theorem. It pointed out in a straightforward way that interpreting entanglement
from a local realist point of view can be problematic. I propose here an
extended version of Mermin's device that can actually be given a simple local
realist interpretation through a sample selection bias, and I argue that we
still have no scientific reason to believe that the moon could possibly not be
there when nobody looks.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:53:04 GMT"
},
{
"version": "v2",
"created": "Fri, 29 Jun 2007 22:06:00 GMT"
},
{
"version": "v3",
"created": "Fri, 10 Aug 2007 15:59:02 GMT"
}
] | 2008-03-06T00:00:00 | [
[
"Adenier",
"Guillaume",
""
]
] |
0705.1478 | Jason Ferguson | Jason W. Ferguson, Amanda S. Heffner-Wong, Jonathan J. Penley, Travis
S. Barman, David R. Alexander | Grain Physics and Rosseland Mean Opacities | 19 pages, 6 figures, accepted for publication in ApJ | Astrophys.J.666:261-266,2007 | 10.1086/519783 | null | astro-ph | null | Tables of mean opacities are often used to compute the transfer of radiation
in a variety of astrophysical simulations from stellar evolution models to
proto-planetary disks. Often tables, such as Ferguson et al. (2005), are
computed with a predetermined set of physical assumptions that may or may not
be valid for a specific application. This paper explores the effects of several
assumptions of grain physics on the Rosseland mean opacity in an oxygen rich
environment. We find that changing the distribution of grain sizes, either the
power-law exponent or the shape of the distribution, has a marginal effect on
the total mean opacity. We also explore the difference in the mean opacity
between solid homogenous grains and grains that are porous or conglomorations
of several species. Changing the amount of grain opacity included in the mean
by assuming a grain-to-gas ratio significantly affects the mean opacity, but in
a predictable way.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:56:31 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Ferguson",
"Jason W.",
""
],
[
"Heffner-Wong",
"Amanda S.",
""
],
[
"Penley",
"Jonathan J.",
""
],
[
"Barman",
"Travis S.",
""
],
[
"Alexander",
"David R.",
""
]
] |
0705.1479 | Laurent Vernac | R. Chicireanu, Q. Beaufils, A. Pouderous, B. Laburthe-Tolra, E.
Marechal, L. Vernac, J.-C. Keller, and O. Gorceix | Accumulation of chromium metastable atoms into an Optical Trap | 7 pages, 5 Figures | null | 10.1140/epjd/e2007-00245-y | null | physics.atom-ph | null | We report the fast accumulation of a large number of metastable 52Cr atoms in
a mixed trap, formed by the superposition of a strongly confining optical trap
and a quadrupolar magnetic trap. The steady state is reached after about 400
ms, providing a cloud of more than one million metastable atoms at a
temperature of about 100 microK, with a peak density of 10^{18} atoms.m^{-3}.
We have optimized the loading procedure, and measured the light shift of the
5D4 state by analyzing how the trapped atoms respond to a parametric
excitation. We compare this result to a theoretical evaluation based on the
available spectroscopic data for chromium atoms.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 13:57:35 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Chicireanu",
"R.",
""
],
[
"Beaufils",
"Q.",
""
],
[
"Pouderous",
"A.",
""
],
[
"Laburthe-Tolra",
"B.",
""
],
[
"Marechal",
"E.",
""
],
[
"Vernac",
"L.",
""
],
[
"Keller",
"J. -C.",
""
],
[
"Gorceix",
"O.",
""
]
] |
0705.1480 | Stephan Eule | S.Eule, R.Friedrich and F.Jenko | Anomalous Diffusion of particles with inertia in external potentials | 12 pages, 8 figures | null | null | null | cond-mat.stat-mech | null | Recently a new type of Kramers-Fokker-Planck Equation has been proposed [R.
Friedrich et al. Phys. Rev. Lett. {\bf 96}, 230601 (2006)] describing anomalous
diffusion in external potentials. In the present paper the explicit cases of a
harmonic potential and a velocity-dependend damping are incorporated. Exact
relations for moments for these cases are presented and the asymptotic
behaviour for long times is discussed. Interestingly the bounding potential and
the additional damping by itself lead to a subdiffussive behaviour, while
acting together the particle becomes localized for long times.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:07:08 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Eule",
"S.",
""
],
[
"Friedrich",
"R.",
""
],
[
"Jenko",
"F.",
""
]
] |
0705.1481 | Raihan Kibria | Raihan H. Kibria | Actin - Technical Report | 15 pages | null | null | null | cs.NE | null | The Boolean satisfiability problem (SAT) can be solved efficiently with
variants of the DPLL algorithm. For industrial SAT problems, DPLL with conflict
analysis dependent dynamic decision heuristics has proved to be particularly
efficient, e.g. in Chaff. In this work, algorithms that initialize the variable
activity values in the solver MiniSAT v1.14 by analyzing the CNF are evolved
using genetic programming (GP), with the goal to reduce the total number of
conflicts of the search and the solving time. The effect of using initial
activities other than zero is examined by initializing with random numbers. The
possibility of countering the detrimental effects of reordering the CNF with
improved initialization is investigated. The best result found (with validation
testing on further problems) was used in the solver Actin, which was submitted
to SAT-Race 2006.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:10:08 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Kibria",
"Raihan H.",
""
]
] |
0705.1482 | Antonello Scardicchio | A. Scardicchio, F.H. Stillinger, S. Torquato | Estimates of the optimal density and kissing number of sphere packings
in high dimensions | 23 pages, 4 figures, submitted to Phys. Rev. E | null | 10.1063/1.2897027 | null | cond-mat.stat-mech | null | The problem of finding the asymptotic behavior of the maximal density of
sphere packings in high Euclidean dimensions is one of the most fascinating and
challenging problems in discrete geometry. One century ago, Minkowski obtained
a rigorous lower bound that is controlled asymptotically by $1/2^d$, where $d$
is the Euclidean space dimension. An indication of the difficulty of the
problem can be garnered from the fact that exponential improvement of
Minkowski's bound has proved to be elusive, even though existing upper bounds
suggest that such improvement should be possible. Using a
statistical-mechanical procedure to optimize the density associated with a
"test" pair correlation function and a conjecture concerning the existence of
disordered sphere packings [S. Torquato and F. H. Stillinger, Experimental
Math. {\bf 15}, 307 (2006)], the putative exponential improvement was found
with an asymptotic behavior controlled by $1/2^{(0.77865...)d}$. Using the same
methods, we investigate whether this exponential improvement can be further
improved by exploring other test pair correlation functions correponding to
disordered packings. We demonstrate that there are simpler test functions that
lead to the same asymptotic result. More importantly, we show that there is a
wide class of test functions that lead to precisely the same exponential
improvement and therefore the asymptotic form $1/2^{(0.77865...)d}$ is much
more general than previously surmised.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:10:42 GMT"
},
{
"version": "v2",
"created": "Thu, 10 May 2007 20:31:52 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Scardicchio",
"A.",
""
],
[
"Stillinger",
"F. H.",
""
],
[
"Torquato",
"S.",
""
]
] |
0705.1483 | Andrea Mauri | Federico Elmetti, Andrea Mauri, Silvia Penati, Alberto Santambrogio
and Daniela Zanon | Real versus complex beta-deformation of the N=4 planar super Yang-Mills
theory | 18 pages, 7 figures; v2: one reference added; v3: JHEP published
version | JHEP0710:102,2007 | 10.1088/1126-6708/2007/10/102 | IFUM-892-FT, Bicocca-FT-06-14 | hep-th | null | This is a sequel of our paper hep-th/0606125 in which we have studied the
{\cal N}=1 SU(N) SYM theory obtained as a marginal deformation of the {\cal
N}=4 theory, with a complex deformation parameter \beta and in the planar
limit. There we have addressed the issue of conformal invariance imposing the
theory to be finite and we have found that finiteness requires reality of the
deformation parameter \beta. In this paper we relax the finiteness request and
look for a theory that in the planar limit has vanishing beta functions. We
perform explicit calculations up to five loop order: we find that the
conditions of beta function vanishing can be achieved with a complex
deformation parameter, but the theory is not finite and the result depends on
the arbitrary choice of the subtraction procedure. Therefore, while the
finiteness condition leads to a scheme independent result, so that the
conformal invariant theory with a real deformation is physically well defined,
the condition of vanishing beta function leads to a result which is scheme
dependent and therefore of unclear significance. In order to show that these
findings are not an artefact of dimensional regularization, we confirm our
results within the differential renormalization approach.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:22:22 GMT"
},
{
"version": "v2",
"created": "Wed, 6 Jun 2007 09:44:25 GMT"
},
{
"version": "v3",
"created": "Tue, 30 Oct 2007 16:10:17 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Elmetti",
"Federico",
""
],
[
"Mauri",
"Andrea",
""
],
[
"Penati",
"Silvia",
""
],
[
"Santambrogio",
"Alberto",
""
],
[
"Zanon",
"Daniela",
""
]
] |
0705.1484 | Jozsef Garai | Jozsef Garai | The First Law of Thermodynamics and the Thermodynamic Description of
Elastic Solids | null | null | null | null | physics.chem-ph physics.gen-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Historically, the thermodynamic behavior of gasses was described first and
the derived equations were adapted to solids. It is suggested that the current
thermodynamic description of solid phase is still incomplete because the
isothermal work done on or by the system is not counted in the internal energy.
It is also suggested that the isobaric work should not be deducted from the
internal energy because the system does not do work when it expands. Further
more it is suggested that Joule postulate regarding the mechanical equivalency
of heat -the first law of thermodynamics- is not universal and not applicable
to elastic solids. The equations for the proposed thermodynamic description of
solids are derived and tested by calculating the internal energies of the
system using the equation of state of MgO. The agreement with theory is good.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:22:58 GMT"
},
{
"version": "v2",
"created": "Fri, 26 Sep 2008 16:51:19 GMT"
},
{
"version": "v3",
"created": "Fri, 2 Jan 2009 18:07:27 GMT"
},
{
"version": "v4",
"created": "Thu, 19 Mar 2009 01:16:32 GMT"
},
{
"version": "v5",
"created": "Thu, 20 Aug 2009 20:43:31 GMT"
},
{
"version": "v6",
"created": "Wed, 24 Feb 2010 18:39:10 GMT"
}
] | 2010-02-24T00:00:00 | [
[
"Garai",
"Jozsef",
""
]
] |
0705.1485 | Cormac Walsh | Cormac Walsh | Busemann points of Artin groups of dihedral type | 17 pages | null | null | null | math.GR | null | We study the horofunction boundary of an Artin group of dihedral type with
its word metric coming from either the usual Artin generators or the dual
generators. In both cases, we determine the horoboundary and say which points
are Busemann points, that is the limits of geodesic rays. In the case of the
dual generators, it turns out that all boundary points are Busemann points, but
this is not true for the Artin generators. We also characterise the geodesics
with respect to the dual generators, which allows us to calculate the
associated geodesic growth series.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:36:47 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Walsh",
"Cormac",
""
]
] |
0705.1486 | Vishnu Natchu | Vishnu Natchu, Richard A. Matzner | High order convergent multigrid methods on domains containing holes for
black hole initial data | 17 pages, 13 figures | null | null | null | gr-qc | null | It is well known that multigrid methods are optimally efficient for solution
of elliptic equations (O(N)), which means that effort is proportional to the
number of points at which the solution is evaluated). Thus this is an ideal
method to solve the initial data/constraint equations in General Relativity for
(for instance) black hole interactions, or for other strong-field gravitational
configurations. Recent efforts have produced finite difference multigrid
solvers for domains with holes (excised regions). We present here the extension
of these concepts to higher order (fourth-, sixth- and eigth-order). The high
order convergence allows rapid solution on relatively small computational
grids. Also, general relativity evolution codes are moving to typically
fourth-order; data have to be computed at least as accurately as this same
order for straightfoward demonstration of the proper order of convergence in
the evolution.
Our vertex-centered multigrid code demonstrates globally high-order-accurate
solutions of elliptic equations over domains containing holes, in two spatial
dimensions with fixed (Dirichlet) outer boundary conditions, and in three
spatial dimensions with {\it Robin} outer boundary conditions. We demonstrate a
``real world'' 3-dimensional problem which is the solution of the conformally
flat Hamiltonian constraint of General Relativity. The success of this method
depends on: a) the choice of the discretization near the holes; b) the
definition of the location of the inner boundary, which allows resolution of
the hole even on the coarsest grids; and on maintaining the same order of
convergence at the boundaries as in the interior of the computational domain.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:30:36 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Natchu",
"Vishnu",
""
],
[
"Matzner",
"Richard A.",
""
]
] |
0705.1487 | Paola Cristofori | Paola Bandieri, Paola Cristofori and Carlo Gagliardi | Nonorientable 3-manifolds admitting coloured triangulations with at most
30 tetrahedra | 18 pages, 3 figures | Journal of Knot Theory and its Ramifications 18 (3) (2009),
381-395 | null | null | math.GT | null | We present the census of all non-orientable, closed, connected 3-manifolds
admitting a rigid crystallization with at most 30 vertices. In order to obtain
the above result, we generate, manipulate and compare, by suitable computer
procedures, all rigid non-bipartite crystallizations up to 30 vertices.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:32:47 GMT"
}
] | 2012-03-02T00:00:00 | [
[
"Bandieri",
"Paola",
""
],
[
"Cristofori",
"Paola",
""
],
[
"Gagliardi",
"Carlo",
""
]
] |
0705.1488 | Javier Mu\~noz-Garc\'ia | M. Castro, J. Mu\~noz-Garc\'ia, R. Cuerno, M. Garc\'ia Hern\'andez and
L. V\'azquez | Generic equations for pattern formation in evolving interfaces | null | New Journal of Physics. Vol 9. 102. (2007) | 10.1088/1367-2630/9/4/102 | null | cond-mat.other cond-mat.stat-mech | null | We present a general formalism which allows us to derive the evolution
equations describing one-dimensional (1D) and isotropic 2D interfacelike
systems, that is based on symmetries, conservation laws, multiple scale
arguments, and exploits the relevance of coarsening dynamics. Our approach
becomes especially significant in the presence of surface morphological
instabilities and allows us to classify the most relevant nonlinear terms in
the continuum description of these systems. The formalism applies to systems
ranging from eroded nanostructures to macroscopic pattern formation. In
particular, we show the validity of the theory for novel experiments on ion
plasma erosion.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:34:53 GMT"
}
] | 2016-08-14T00:00:00 | [
[
"Castro",
"M.",
""
],
[
"Muñoz-García",
"J.",
""
],
[
"Cuerno",
"R.",
""
],
[
"Hernández",
"M. García",
""
],
[
"Vázquez",
"L.",
""
]
] |
0705.1489 | Diego Aristizabal | Diego Aristizabal Sierra, Marta Losada, Enrico Nardi | Variations on leptogenesis | One error corrected, several references added, results unchanged. 17
pages | Phys.Lett.B659:328-335,2008 | 10.1016/j.physletb.2007.10.030 | IFIC/07-24, PI/UAN-FT2007-172, UdeA-PE-07/004 | hep-ph | null | We study variations of the standard leptogenesis scenario that can arise if
an additional mass scale related to the breaking of some new symmetry (as for
example a flavor or the B-L symmetry) is present below the mass $M_{N_1}$ of
the lightest right-handed Majorana neutrino. Our scheme is inspired by U(1)
models of flavor \`a la Froggatt-Nielsen, and involves new vectorlike heavy
fields $F$. We show that depending on the specific hierarchy between $M_{N_1}$
and the mass scale of the fields $F$, qualitatively different realizations of
leptogenesis can emerge. We compute the CP asymmetries in $N_1$ decays in all
the relevant cases, and we conclude that in most situations leptogenesis could
be viable at scales much lower than in the standard scenario.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 16:20:43 GMT"
},
{
"version": "v2",
"created": "Wed, 13 Jun 2007 19:10:47 GMT"
}
] | 2009-09-29T00:00:00 | [
[
"Sierra",
"Diego Aristizabal",
""
],
[
"Losada",
"Marta",
""
],
[
"Nardi",
"Enrico",
""
]
] |
0705.1490 | Emidio Capriotti | Emidio Capriotti, Piero Fariselli, Ivan Rossi and Rita Casadio | A three-state prediction of single point mutations on protein stability
changes | Text: 9 pages, Figures: 9 pages, Tables: 1 page, Supplemetary
Material: 1 page | null | null | null | q-bio.BM q-bio.QM | null | A basic question of protein structural studies is to which extent mutations
affect the stability. This question may be addressed starting from sequence
and/or from structure. In proteomics and genomics studies prediction of protein
stability free energy change (DDG) upon single point mutation may also help the
annotation process. The experimental SSG values are affected by uncertainty as
measured by standard deviations. Most of the DDG values are nearly zero (about
32% of the DDG data set ranges from -0.5 to 0.5 Kcal/mol) and both the value
and sign of DDG may be either positive or negative for the same mutation
blurring the relationship among mutations and expected DDG value. In order to
overcome this problem we describe a new predictor that discriminates between 3
mutation classes: destabilizing mutations (DDG<-0.5 Kcal/mol), stabilizing
mutations (DDG>0.5 Kcal/mol) and neutral mutations (-0.5<=DDG<=0.5 Kcal/mol).
In this paper a support vector machine starting from the protein sequence or
structure discriminates between stabilizing, destabilizing and neutral
mutations. We rank all the possible substitutions according to a three state
classification system and show that the overall accuracy of our predictor is as
high as 52% when performed starting from sequence information and 58% when the
protein structure is available, with a mean value correlation coefficient of
0.30 and 0.39, respectively. These values are about 20 points per cent higher
than those of a random predictor.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:37:34 GMT"
},
{
"version": "v2",
"created": "Wed, 23 May 2007 08:49:48 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Capriotti",
"Emidio",
""
],
[
"Fariselli",
"Piero",
""
],
[
"Rossi",
"Ivan",
""
],
[
"Casadio",
"Rita",
""
]
] |
0705.1491 | Jorge Piekarewicz | J. Piekarewicz | Why is Tin so soft? | 5 pages, 3 figures to be submitted to PRC | Phys.Rev.C76:031301,2007 | 10.1103/PhysRevC.76.031301 | null | nucl-th nucl-ex | null | The distribution of isoscalar monopole strength in the neutron-even
112-124Sn-isotopes has been computed using a relativistic
random-phase-approximation approach. The accurately-calibrated model used here
(``FSUGold'') has been successful in reproducing both ground-state observables
as well as collective excitations - including the giant monopole resonance
(GMR) in 90Zr, 144Sm, and 208Pb. Yet this same model significantly
overestimates the GMR energies in the Sn isotopes. It is argued that the
question of ``Why is Tin so soft?'' becomes an important challenge to the field
and one that should be answered without sacrificing the success already
achieved by several theoretical models.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:50:33 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Piekarewicz",
"J.",
""
]
] |
0705.1492 | Simone Secchi | Marta Calanchi, Simone Secchi and Elide Terraneo | Multiple Solutions for a Henon-Like Equation on the Annulus | Final version, accepted by Journal of Differential Equations | null | null | null | math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the equation (-\Delta u = | |x|-2 |^\alpha u^{p-1}), (1 < |x| < 3), we
prove the existence of two solutions for (\alpha) large, and of two additional
solutions when (p) is close to the critical Sobolev exponent (2^*=2N/(N-2)). A
symmetry--breaking phenomenon appears, showing that the least--energy solutions
cannot be radial functions.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 14:53:24 GMT"
},
{
"version": "v2",
"created": "Tue, 10 Jun 2008 08:16:56 GMT"
}
] | 2008-06-10T00:00:00 | [
[
"Calanchi",
"Marta",
""
],
[
"Secchi",
"Simone",
""
],
[
"Terraneo",
"Elide",
""
]
] |
0705.1493 | Dmitry Smirnov | Georgy Fedorov, Alexander Tselev, David Jimenez, Sylvain Latil,
Nikolay G. Kalugin, Paola Barbara, Dmitry Smirnov and Stephane Roche | Magnetically Induced Field Effect in Carbon Nanotube Devices | 5 pages, 4 figures, 1 table | Fedorov at al, NANO LETTERS, 7 (4), 960-964 (2007) | 10.1007/978-1-4020-8425-6_27 | null | cond-mat.mes-hall cond-mat.mtrl-sci | null | Three-terminal devices with conduction channels formed by quasi-metallic
carbon nanotubes (CNT) are shown to operate as nanotube-based field-effect
transistors under strong magnetic fields. The off-state conductance of the
devices varies exponentially with the magnetic flux intensity. We extract the
quasi-metallic CNT chirality as well as the characteristics of the Schottky
barriers formed at the metal-nanotube contacts from temperature-dependent
magnetoconductance measurements.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 15:04:02 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Fedorov",
"Georgy",
""
],
[
"Tselev",
"Alexander",
""
],
[
"Jimenez",
"David",
""
],
[
"Latil",
"Sylvain",
""
],
[
"Kalugin",
"Nikolay G.",
""
],
[
"Barbara",
"Paola",
""
],
[
"Smirnov",
"Dmitry",
""
],
[
"Roche",
"Stephane",
""
]
] |
0705.1494 | Tomoki Saito | Tomoki Saito, Kazuhiro Shimasaku, Sadanori Okamura, Masami Ouchi,
Masayuki Akiyama, Michitoshi Yoshida, Yoshihiro Ueda | Deep Spectroscopy of Systematically Surveyed Extended Lyman-alpha
Sources at z~3-5 | submitted to ApJ | null | 10.1086/527282 | null | astro-ph | null | Spatially extended Ly-alpha sources that are faint and/or compact in coninuum
are candidates for extremely young (~< 10^7 yrs) galaxies at high redshifts. We
present medium-resolution (R~2000) spectroscopy of such extended Ly-alpha
sources found in our previous study at z~3-5, using VLT/VIMOS. The deep
spectroscopy showed that all 18 objects we observed have large equivalent
widths (EWs) exceeding 100 A. For about 30% of our sample (five objects), we
identified conspicuous asymmetry on the profiles of the Ly-alpha line. They
show broad wing emission components on the red side, and sharp cut-off on the
blue side of the Ly-alpha line. Such asymmetry is often seen in superwind
galaxies known to date, and also consistent with a theoretical prediction of
superwind activity. There are eight objects (8/18 ~ 40%) that have large EWs
exceeding 200 A, and no clear signature of superwind activities. Such large EWs
cannot be explained in terms of photo-ionization by a moderately old (>10^7
yrs) stellar population, even with a top-heavy IMF or an extremely low
metallicity. These eight objects clearly show a positive correlation between
the Ly-alpha luminosity and the velocity width. This suggests that these eight
objects are good candidates for forming-galaxies in a gas-cooling phase.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 15:07:41 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Saito",
"Tomoki",
""
],
[
"Shimasaku",
"Kazuhiro",
""
],
[
"Okamura",
"Sadanori",
""
],
[
"Ouchi",
"Masami",
""
],
[
"Akiyama",
"Masayuki",
""
],
[
"Yoshida",
"Michitoshi",
""
],
[
"Ueda",
"Yoshihiro",
""
]
] |
0705.1495 | Martti Raidal | A. Hektor, M. Kadastik, M. Muntel, M. Raidal, and L. Rebane | Testing neutrino masses in little Higgs models via discovery of doubly
charged Higgs at LHC | 16 pages, 3 figures; reference added to Section 6, numerical values
of statistical data added to Section 5, typos corrected | Nucl.Phys.B787:198-210,2007 | 10.1016/j.nuclphysb.2007.07.014 | null | hep-ph hep-ex | null | We have investigated the possibility of direct tests of little Higgs models
incorporating triplet Higgs neutrino mass mechanism at LHC experiments. We have
performed Monte Carlo studies of Drell-Yan pair production of doubly charged
Higgs boson \Phi^{++} followed by its leptonic decays which branching ratios
are fixed from the neutrino oscillation data. We propose appropriate selection
rules for the four-lepton signal, including reconstructed taus, which are
optimized for the discovery of \Phi^{++} with the lowest LHC luminosity. As the
Standard Model background can be effectively eliminated, an important aspect of
our study is the correct statistical treatment of the LHC discovery potential.
Adding detection efficiencies and measurement errors to the Monte Carlo
analyses, \Phi^{++} can be discovered up to the mass 250 GeV in the first year
of LHC, and 700 GeV mass is reachable for the integrated luminosity L=30
fb^{-1}.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 15:15:45 GMT"
},
{
"version": "v2",
"created": "Thu, 7 Jun 2007 07:42:21 GMT"
},
{
"version": "v3",
"created": "Wed, 17 Oct 2007 10:07:36 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Hektor",
"A.",
""
],
[
"Kadastik",
"M.",
""
],
[
"Muntel",
"M.",
""
],
[
"Raidal",
"M.",
""
],
[
"Rebane",
"L.",
""
]
] |
0705.1496 | Pietro Slavich | Nicolas Bernal, Abdelhak Djouadi, Pietro Slavich | The MSSM with heavy scalars | 51 pages, 18 figures. v2: references and MSbar-DRbar translation
formulae added; version published in JHEP. v3: footnote on MSbar-DRbar
conversion added in the appendix | JHEP0707:016,2007 | 10.1088/1126-6708/2007/07/016 | LPT-07-25; CERN-PH-TH/2007-074 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a comprehensive analysis of the Minimal Supersymmetric Standard
Model (MSSM) in the scenario where the scalar partners of the fermions and the
Higgs particles (except for the Standard-Model-like one) are assumed to be very
heavy and are removed from the low-energy spectrum. We first summarize our
determination of the mass spectrum, in which we include the one-loop radiative
corrections and resum to all orders the leading logarithms of the large scalar
masses, and describe the implementation of these features in the FORTRAN code
SuSpect which calculates the masses and couplings of the MSSM particles. We
then study in detail the phenomenology of the model in scenarios where the
gaugino mass parameters are non-universal at the GUT scale, which leads to very
interesting features that are not present in the widely studied case of
universal gaugino mass parameters. We discuss the constraints from collider
searches and high-precision measurements, the cosmological constraints on the
relic abundance of the neutralino candidate for the Dark Matter in the Universe
- where new and interesting channels for neutralino annihilation appear - and
the gluino lifetime. We then analyze, in the case of non-universal gaugino
masses, the decays of the Higgs boson (in particular decays into and
contributions of SUSY particles), of charginos and neutralinos (in particular
decays into Higgs bosons and photons) and of gluinos, and highlight the
differences from the case of universal gaugino masses.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 19:23:01 GMT"
},
{
"version": "v2",
"created": "Fri, 6 Jul 2007 13:58:07 GMT"
},
{
"version": "v3",
"created": "Thu, 8 Dec 2011 20:32:50 GMT"
}
] | 2011-12-09T00:00:00 | [
[
"Bernal",
"Nicolas",
""
],
[
"Djouadi",
"Abdelhak",
""
],
[
"Slavich",
"Pietro",
""
]
] |
0705.1497 | Wilhelm Winter | Marius Dadarlat, Wilhelm Winter | Trivialization of C(X)-algebras with strongly self-absorbing fibres | 27 pages | null | null | null | math.OA | null | Suppose $A$ is a separable unital $C(X)$-algebra each fibre of which is
isomorphic to the same strongly self-absorbing and $K_{1}$-injective
$C^{*}$-algebra $D$. We show that $A$ and $C(X) \otimes D$ are isomorphic as
$C(X)$-algebras provided the compact Hausdorff space $X$ is finite-dimensional.
This statement is known not to extend to the infinite-dimensional case.
| [
{
"version": "v1",
"created": "Thu, 10 May 2007 15:30:54 GMT"
},
{
"version": "v2",
"created": "Fri, 11 May 2007 14:49:40 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Dadarlat",
"Marius",
""
],
[
"Winter",
"Wilhelm",
""
]
] |
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