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| versions
list | update_date
timestamp[s] | authors_parsed
sequence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0705.4498 | Dilian Yang | Kenneth R. Davidson, Stephen C. Power, Dilian Yang | Atomic Representations of Rank 2 Graph Algebras | 42 pages, 5 figures | J. Funct. Anal. 255 (2008), 819--853 | null | null | math.OA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a detailed analysis of atomic *-representations of rank 2 graphs
on a single vertex. They are completely classified up to unitary equivalence,
and decomposed into a direct sum or direct integral of irreducible atomic
representations. The building blocks are described as the minimal *-dilations
of defect free representations modelled on finite groups of rank 2.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 01:19:41 GMT"
},
{
"version": "v2",
"created": "Sat, 22 Nov 2008 01:15:00 GMT"
}
] | 2008-11-22T00:00:00 | [
[
"Davidson",
"Kenneth R.",
""
],
[
"Power",
"Stephen C.",
""
],
[
"Yang",
"Dilian",
""
]
] |
0705.4499 | Dilian Yang | Kenneth R. Davidson, Dilian Yang | Periodicity in Rank 2 Graph Algebras | 27 pages | Can. J. Math.-J. Can. Math. 61 (2009) 1239-1261 | 10.4153/CJM-2009-058-0 | null | math.OA | null | Kumjian and Pask introduced an aperiodicity condition for higher rank graphs.
We present a detailed analysis of when this occurs in certain rank 2 graphs.
When the algebra is aperiodic, we give another proof of the simplicity of
$\ca(\Fth)$. The periodic C*-algebras are characterized, and it is shown that
$\ca(\Fth) \simeq \rC(\bT) \otimes \fA$ where $\fA$ is a simple C*-algebra.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 01:25:24 GMT"
}
] | 2019-08-15T00:00:00 | [
[
"Davidson",
"Kenneth R.",
""
],
[
"Yang",
"Dilian",
""
]
] |
0705.4500 | Haiming Hu | M.Ablikim, et al. (BES Collaboration) | Determination of the $\psi(3770)$, $\psi(4040)$, $\psi(4160)$ and
$\psi(4415)$ resonance parameters | 9 pages, 3 figures, 1 table | ECONF C070805:02,2007; Phys.Lett.B660:315-319,2008 | 10.1016/j.physletb.2007.11.100 | null | hep-ex | null | $R$ measurement data taken with the BESII detector at center-of-mass energies
between 3.7 and 5.0 GeV is fitted to determine resonance parameters (mass,
total width, electron width) of the high mass charmonium states, $\psi(3770)$,
$\psi(4040)$, $\psi(4160)$ and $\psi(4415)$. Various effects, including the
relative phases between the resonances, interferences, the energy-dependence of
the full widths, and the initial state radiative correction, are examined. The
results are compared to previous studies.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 01:27:24 GMT"
}
] | 2019-08-18T00:00:00 | [
[
"Ablikim",
"M.",
""
]
] |
0705.4501 | \c{S}erban Smadici | Serban Smadici, Peter Abbamonte, Anand Bhattacharya, Xiaofang Zhai,
Andrivo Rusydi, James N. Eckstein, Samuel D. Bader, Jian-Min Zuo | Electronic reconstruction at SrMnO3-LaMnO3 superlattice interfaces | 4.2 pages, 4 figures | null | 10.1103/PhysRevLett.99.196404 | null | cond-mat.str-el cond-mat.mtrl-sci | null | We use resonant soft x-ray scattering to study electronic reconstruction at
the interface between the Mott insulator LaMnO3 and the "band" insulator
SrMnO3. Superlattices of these two insulators were shown previously to have
both ferromagnetism and metallic tendencies [Koida et al., Phys. Rev. B 66,
144418 (2002)]. By studying a judiciously chosen superlattice reflection we
show that the interface density of states exhibits a pronounced peak at the
Fermi level, similar to that predicted by Okamoto et al. [Phys. Rev. B 70,
241104(R) (2004)]. The intensity of this peak correlates with the conductivity
and magnetization, suggesting it is the driver of metallic behavior. Our study
demonstrates a general strategy for using RSXS to probe the electronic
properties of heterostructure interfaces.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 02:20:48 GMT"
},
{
"version": "v2",
"created": "Fri, 1 Jun 2007 16:08:19 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Smadici",
"Serban",
""
],
[
"Abbamonte",
"Peter",
""
],
[
"Bhattacharya",
"Anand",
""
],
[
"Zhai",
"Xiaofang",
""
],
[
"Rusydi",
"Andrivo",
""
],
[
"Eckstein",
"James N.",
""
],
[
"Bader",
"Samuel D.",
""
],
[
"Zuo",
"Jian-Min",
""
]
] |
0705.4502 | Dong Han | Qi Wang, Jian-Long Han, Yu-Chuan Dong, Song-Lin Li, Li-Min Duan,
Hu-Shan Xu, Hua-Gen Xu, Ruo-Fu Chen, He-Yu Wu, Zhen Bai, Zhi-Chang Li,
Xiu-Qin Lu, Kui Zhao, Jian-Cheng Liu, Guo-Ji Xu, S.Yu. Kun | Experimental indication of anomalous sensitivity in many-body systems:
Deterministic randomness in complex quantum collisions? | 4 pages, 4 figures | null | null | null | quant-ph nucl-ex nucl-th | null | We have experimentally tested a recently suggested possibility for anomalous
sensitivity of the cross sections of dissipative heavy ion collisions. Cross
sections for the $^{19}$F+$^{27}$Al dissipative collisions were measured at the
fixed energy 118.75 MeV of the $^{19}$F for the 12 different beam spots on the
same target foil. The data demonstrate dramatic differences between the cross
sections for the different beam spots. The effect may indicate deterministic
randomness in complex quantum collisions. New experiments are highly desirable
in a view of the fundamental importance of the problem.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 02:31:06 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Wang",
"Qi",
""
],
[
"Han",
"Jian-Long",
""
],
[
"Dong",
"Yu-Chuan",
""
],
[
"Li",
"Song-Lin",
""
],
[
"Duan",
"Li-Min",
""
],
[
"Xu",
"Hu-Shan",
""
],
[
"Xu",
"Hua-Gen",
""
],
[
"Chen",
"Ruo-Fu",
""
],
[
"Wu",
"He-Yu",
""
],
[
"Bai",
"Zhen",
""
],
[
"Li",
"Zhi-Chang",
""
],
[
"Lu",
"Xiu-Qin",
""
],
[
"Zhao",
"Kui",
""
],
[
"Liu",
"Jian-Cheng",
""
],
[
"Xu",
"Guo-Ji",
""
],
[
"Kun",
"S. Yu.",
""
]
] |
0705.4503 | Juan G. Restrepo | Juan G. Restrepo, Edward Ott, Brian R. Hunt | Approximating the largest eigenvalue of network adjacency matrices | 7 pages, 4 figures | null | 10.1103/PhysRevE.76.056119 | null | cond-mat.dis-nn | null | The largest eigenvalue of the adjacency matrix of a network plays an
important role in several network processes (e.g., synchronization of
oscillators, percolation on directed networks, linear stability of equilibria
of network coupled systems, etc.). In this paper we develop approximations to
the largest eigenvalue of adjacency matrices and discuss the relationships
between these approximations. Numerical experiments on simulated networks are
used to test our results.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 02:53:30 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Restrepo",
"Juan G.",
""
],
[
"Ott",
"Edward",
""
],
[
"Hunt",
"Brian R.",
""
]
] |
0705.4504 | Gennady Kovalev V. | Gennady V. Kovalev | The Volume Capture in Structures with Variable Curvature | 8 pages, 3 figures, 37 Int Conference Moscow | null | null | null | physics.acc-ph physics.atom-ph physics.class-ph | null | The volume capture in classical relativistic mechanics is considered as a
scattering process for the high energy charged particles in a field with no
central or mirror symmetry. The parameters of volume capture for potentials
with smooth variable curvature are received and analyzed.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 16:52:00 GMT"
},
{
"version": "v2",
"created": "Tue, 28 Aug 2007 14:01:53 GMT"
},
{
"version": "v3",
"created": "Thu, 25 Oct 2007 20:38:07 GMT"
}
] | 2007-10-25T00:00:00 | [
[
"Kovalev",
"Gennady V.",
""
]
] |
0705.4505 | Alister W. Graham | Alister W. Graham (Swinburne, Australia), Simon P. Driver (St Andrews,
Scotland) | The local supermassive black hole mass density: corrections for
dependencies on the Hubble constant | MNRAS, accepted | 2007, MNRAS, 380, L15 | 10.1111/j.1745-3933.2007.00340.x | null | astro-ph | null | We have investigated past measurements of the local supermassive black hole
mass density, correcting for hitherto unknown dependencies on the Hubble
constant, which, in some cases, had led to an underestimation of the mass
density by factors of ~2. Correcting for this, we note that the majority of
past studies yield a local supermassive black hole mas density that is
consistent with the range 4.4-5.9 x 10^5 f(H_0) M_Sun / Mpc^3 (when using H_0 =
70 km/s/Mpc). In addition, we address a number of ways in which these past
estimates can be further developed. In particular, we tabulate realistic
bulge-to-total flux ratios which can be used to estimate the luminosity of
bulges and subsequently their central black hole masses.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 02:56:23 GMT"
}
] | 2012-04-26T00:00:00 | [
[
"Graham",
"Alister W.",
"",
"Swinburne, Australia"
],
[
"Driver",
"Simon P.",
"",
"St Andrews,\n Scotland"
]
] |
0705.4506 | Jinsung Park | Paul Loya, Sergiu Moroianu, and Jinsung Park | Adiabatic limit of the eta invariant over cofinite quotient of PSL(2,R) | 25 pages | null | 10.1112/S0010437X0800362X | null | math.SP math.DG | null | We study the adiabatic limit of the eta invariant of the Dirac operator over
cofinite quotient of PSL(2,R), which is a noncompact manifold with a nonexact
fibred-cusp metric near the ends.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 02:57:29 GMT"
}
] | 2014-01-14T00:00:00 | [
[
"Loya",
"Paul",
""
],
[
"Moroianu",
"Sergiu",
""
],
[
"Park",
"Jinsung",
""
]
] |
0705.4507 | Joao Magueijo | Joao Magueijo and John W. Moffat | Comments on "Note on varying speed of light theories" | null | Gen.Rel.Grav.40:1797-1806,2008 | 10.1007/s10714-007-0568-2 | null | gr-qc astro-ph hep-ph | null | In a recent note Ellis criticizes varying speed of light theories on the
grounds of a number of foundational issues. His reflections provide us with an
opportunity to clarify some fundamental matters pertaining to these theories.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 03:18:51 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Magueijo",
"Joao",
""
],
[
"Moffat",
"John W.",
""
]
] |
0705.4508 | Kunming Xu | Kunming Xu | The unification of Pythagorean theorem for electronic orbitals with
Kepler's law for planetary orbits | 17 pages, 10 figures, comments are welcome | Scientific Research Monthly, 2007 (3), pp.13-19, 25 | null | null | physics.gen-ph | null | In the context of two-dimensional spacetime within a helium atom, both 1s
electrons are characterized by wave functions that observe duality equation.
They are symmetric, orthogonal and interwoven, forming a dynamic rope structure
at any moment. Instead of elliptical orbit of planets around the sun,
electronic orbitals take the form of matter state transformation cycle. While
the kinematic movement of planets is governed by Kepler's first law, electronic
transformation obeys Pythagorean theorem, both being equivalent in physical
principle. The atomic spacetime is a continuous medium of electron clouds in
synchronized differential and integral processes that are implemented by smooth
trigonometry. In order to integrate this new approach with conventional
physics, the author translates the pattern of electronic motion in the atomic
spacetime into spherical volume undulation in Euclidean geometry and calculates
the probability density of an electron within the sphere from the classical
perspective. From the primary wave function of a 1s electron, the author also
tries to derive the mathematical expression of central force that guides the
surrounding bodies along the orbits. The result is exciting and surprising that
questions the exactness of the venerable Coulomb's law.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 03:25:57 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Xu",
"Kunming",
""
]
] |
0705.4509 | Hanhee Paik | Hanhee Paik, B. K. Cooper, S. K. Dutta, R. M. Lewis, R. C. Ramos, T.
A. Palomaki, A. J. Przybysz, A. J. Dragt, J. R. Anderson, C. J. Lobb, and F.
C. Wellstood (CSR, JQI, University of Maryland) | Comparison of coherence times in three dc SQUID phase qubits | 4 pages, 5 figures, accepted for publication in IEEE Trans. Appl.
Supercond | null | 10.1109/TASC.2007.898124 | null | cond-mat.supr-con | null | We report measurements of spectroscopic linewidth and Rabi oscillations in
three thin-film dc SQUID phase qubits. One device had a single-turn Al loop,
the second had a 6-turn Nb loop, and the third was a first order gradiometer
formed from 6-turn wound and counter-wound Nb coils to provide isolation from
spatially uniform flux noise. In the 6 - 7.2 GHz range, the spectroscopic
coherence times for the gradiometer varied from 4 ns to 8 ns, about the same as
for the other devices (4 to 10 ns). The time constant for decay of Rabi
oscillations was significantly longer in the single-turn Al device (20 to 30
ns) than either of the Nb devices (10 to 15 ns). These results imply that
spatially uniform flux noise is not the main source of decoherence or
inhomogenous broadening in these devices.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 04:15:11 GMT"
},
{
"version": "v2",
"created": "Thu, 31 May 2007 23:15:07 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Paik",
"Hanhee",
"",
"CSR, JQI, University of Maryland"
],
[
"Cooper",
"B. K.",
"",
"CSR, JQI, University of Maryland"
],
[
"Dutta",
"S. K.",
"",
"CSR, JQI, University of Maryland"
],
[
"Lewis",
"R. M.",
"",
"CSR, JQI, University of Maryland"
],
[
"Ramos",
"R. C.",
"",
"CSR, JQI, University of Maryland"
],
[
"Palomaki",
"T. A.",
"",
"CSR, JQI, University of Maryland"
],
[
"Przybysz",
"A. J.",
"",
"CSR, JQI, University of Maryland"
],
[
"Dragt",
"A. J.",
"",
"CSR, JQI, University of Maryland"
],
[
"Anderson",
"J. R.",
"",
"CSR, JQI, University of Maryland"
],
[
"Lobb",
"C. J.",
"",
"CSR, JQI, University of Maryland"
],
[
"Wellstood",
"F. C.",
"",
"CSR, JQI, University of Maryland"
]
] |
0705.4510 | Robert Taggart | Robert J. Taggart | Pointwise convergence for semigroups in vector-valued $L^p$ spaces | In version2 we correct the error present in version 1 as well as
removing one of the hypotheses of the main theorem. Section 2 is also
rewritten | null | null | null | math.FA math.SP | null | Suppose that T_t is a symmetric diffusion semigroup on L^2(X) and consider
its tensor product extension to the Bochner space L^p(X,B), where B belongs to
a certain broad class of UMD spaces. We prove a vector-valued version of the
Hopf--Dunford--Schwartz ergodic theorem and show that this extends to a maximal
theorem for analytic continuations of the semigroup's extension to L^p(X,B). As
an application, we show that such continuations exhibit pointwise convergence.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 05:08:14 GMT"
},
{
"version": "v2",
"created": "Thu, 28 Feb 2008 02:56:38 GMT"
}
] | 2008-02-28T00:00:00 | [
[
"Taggart",
"Robert J.",
""
]
] |
0705.4511 | Trevor Mendel | Jon T. Mendel (Swinburne University), Robert N. Proctor (Swinburne),
Duncan A. Forbes (Swinburne) | The Age, Metallicity and Alpha-Element Abundance of Galactic Globular
Clusters from Single Stellar Population Models | 22 pages, 19 figures, accepted for publication in MNRAS | Mon.Not.Roy.Astron.Soc.379:1618-1636,2007 | 10.1111/j.1365-2966.2007.12041.x | null | astro-ph | null | Establishing the reliability with which stellar population parameters can be
measured is vital to extragalactic astronomy. Galactic GCs provide an excellent
medium in which to test the consistency of Single Stellar Population (SSP)
models as they should be our best analogue to a homogeneous (single) stellar
population. Here we present age, metallicity and $\alpha$-element abundance
measurements for 48 Galactic globular clusters (GCs) as determined from
integrated spectra using Lick indices and SSP models from Thomas, Maraston &
Korn, Lee & Worthey and Vazdekis et al. By comparing our new measurements to
independent determinations we are able to assess the ability of these SSPs to
derive consistent results -- a key requirement before application to
heterogeneous stellar populations like galaxies.
We find that metallicity determinations are extremely robust, showing good
agreement for all models examined here, including a range of enhancement
methods. Ages and $\alpha$-element abundances are accurate for a subset of our
models, with the caveat that the range of these parameters in Galactic GCs is
limited. We are able to show that the application of published Lick index
response functions to models with fixed abundance ratios allows us to measure
reasonable $\alpha$-element abundances from a variety of models. We also
examine the age-metallicity and [$\alpha$/Fe]-metallicity relations predicted
by SSP models, and characterise the possible effects of varied model horizontal
branch morphology on our overall results.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 04:28:24 GMT"
},
{
"version": "v2",
"created": "Thu, 31 May 2007 23:35:19 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Mendel",
"Jon T.",
"",
"Swinburne University"
],
[
"Proctor",
"Robert N.",
"",
"Swinburne"
],
[
"Forbes",
"Duncan A.",
"",
"Swinburne"
]
] |
0705.4512 | S. Goriely | M. Arnould, S. Goriely, and K. Takahashi | The r-process of stellar nucleosynthesis: Astrophysics and nuclear
physics achievements and mysteries | 164 pages, 98 figures, accepted for publication in Phys. Rep.
higher-quality version available at http://www-astro.ulb.ac.be | Phys.Rept.450:97-213,2007 | 10.1016/j.physrep.2007.06.002 | null | astro-ph | null | The r-process, or the rapid neutron-capture process, of stellar
nucleosynthesis is called for to explain the production of the stable (and some
long-lived radioactive) neutron-rich nuclides heavier than iron that are
observed in stars of various metallicities, as well as in the solar system.
A very large amount of nuclear information is necessary in order to model the
r-process. This concerns the static characteristics of a large variety of light
to heavy nuclei between the valley of stability and the vicinity of the
neutron-drip line, as well as their beta-decay branches or their reactivity.
The enormously challenging experimental and theoretical task imposed by all
these requirements is reviewed, and the state-of-the-art development in the
field is presented. Nuclear-physics-based and astrophysics-free r-process
models of different levels of sophistication have been constructed over the
years. We review their merits and their shortcomings. For long, the core
collapse supernova of massive stars has been envisioned as the privileged
r-process location. We present a brief summary of the one- or multidimensional
spherical or non-spherical explosion simulations available to-date. Their
predictions are confronted with the requirements imposed to obtain an
r-process. The possibility of r-nuclide synthesis during the decompression of
the matter of neutron stars following their merging is also discussed.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 13:46:30 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Arnould",
"M.",
""
],
[
"Goriely",
"S.",
""
],
[
"Takahashi",
"K.",
""
]
] |
0705.4513 | Uffe V. Poulsen | Uffe V. Poulsen and Klaus Molmer | Pair correlated atoms with a twist | 9 pages, to be published in PRA with higher quality figures | null | 10.1103/PhysRevA.76.013614 | null | cond-mat.other quant-ph | null | We present an analysis of the quantum state resulting from the dissociation
of diatomic molecules prepared in a condensate vortex state. The many-body
state preserves the rotational symmetry of the system in quantum correlated
states by having two equally populated components with angular momentum adding
to unity. A simple two-mode analysis and a full quantum field analysis is
presented for the case of non-interacting atoms and weak depletion of the
molecular condensate.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 14:34:37 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Poulsen",
"Uffe V.",
""
],
[
"Molmer",
"Klaus",
""
]
] |
0705.4514 | Feng-Li Lin | Feng-Li Lin, Toshihiro Matsuo, Dan Tomino | Hagedorn Strings and Correspondence Principle in AdS(3) | 28 pages, 4 figures;v2 references added & appear on JHEP | JHEP 0709:042,2007 | 10.1088/1126-6708/2007/09/042 | null | hep-th gr-qc hep-ph | null | Motivated by the possibility of formulating a strings/black hole
correspondence in AdS space, we extract the Hagedorn behavior of thermal AdS_3
bosonic string from 1-loop partition function of SL(2,R) WZW model. We find
that the Hagedorn temperature is monotonically increasing as the AdS radius
shrinks, reaches a maximum of order of string scale set by the unitarity bound
of the CFT for internal space. The resulting density of states near the
Hagedorn temperature resembles the form as for strings in flat space and is
dominated by the space-like long string configurations. We then argue a
conjectured strings/black hole correspondence in AdS space by applying the
Hagedorn thermodynamics. We find the size of the corresponding black hole is a
function of the AdS radius. For large AdS radius a black hole far bigger than
the string scale will form. On the contrary, when the AdS and string scales are
comparable a string size black hole will form. We also examine strings on BTZ
background obtained through SL(2,Z) transformation. We find a tachyonic
divergence for a BTZ black hole of string scale size.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 15:27:48 GMT"
},
{
"version": "v2",
"created": "Mon, 10 Sep 2007 03:58:00 GMT"
}
] | 2009-04-17T00:00:00 | [
[
"Lin",
"Feng-Li",
""
],
[
"Matsuo",
"Toshihiro",
""
],
[
"Tomino",
"Dan",
""
]
] |
0705.4515 | Indranil Biswas | Usha N. Bhosle, Indranil Biswas | Stable real algebraic vector bundles over a Klein bottle | Transactions of the AMS (to appear) | null | null | null | math.AG | null | Let X be a geometrically connected smooth projective curve of genus one,
defined over the field of real numbers, such that X does not have any real
points. We classify the isomorphism classes of all stable real algebraic vector
bundles over X.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 04:33:37 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Bhosle",
"Usha N.",
""
],
[
"Biswas",
"Indranil",
""
]
] |
0705.4516 | Mathias Drton | Mathias Drton | Multiple solutions to the likelihood equations in the Behrens-Fisher
problem | null | Statistics & Probability Letters 2008, Vol. 78, No. 18, 3288-3293 | 10.1016/j.spl.2008.06.012 | null | math.ST stat.TH | null | The Behrens-Fisher problem concerns testing the equality of the means of two
normal populations with possibly different variances. The null hypothesis in
this problem induces a statistical model for which the likelihood function may
have more than one local maximum. We show that such multimodality contradicts
the null hypothesis in the sense that if this hypothesis is true then the
probability of multimodality converges to zero when both sample sizes tend to
infinity. Additional results include a finite-sample bound on the probability
of multimodality under the null and asymptotics for the probability of
multimodality under the alternative.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 04:55:14 GMT"
}
] | 2010-03-04T00:00:00 | [
[
"Drton",
"Mathias",
""
]
] |
0705.4517 | Christian Daveau | Christian Daveau (AGM), Abdessatar Khelifi | On the perturbation of the electromagnetic energy due to the presence of
inhomogeneities with small diameters | null | null | null | null | math-ph math.MP | null | We consider solutions to the time-harmonic Maxwell problem in $\R^3$. For
such solution we provide a rigorous derivation of the asymptotic expansions in
the practically interesting situation, where a finite number of inhomogeneities
of small diameter are imbedded in the entire space. Then, we describe the
behavior of the electromagnetic energy caused by the presence of these
inhomogeneities.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 05:04:34 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Daveau",
"Christian",
"",
"AGM"
],
[
"Khelifi",
"Abdessatar",
""
]
] |
0705.4518 | Martin Beneke | M.Beneke (RWTH Aachen), Y. Kiyo (U. Karlsruhe), K. Schuller (RWTH
Aachen) | Third-order non-Coulomb correction to the S-wave quarkonium wave
functions at the origin | 12 pages, v2: matches published version, missing factors in eq. (9),
(29) added | Phys.Lett.B658:222-229,2008 | 10.1016/j.physletb.2007.09.074 | PITHA 07/02, TTP/07-10 | hep-ph | null | We compute the third-order correction to the S-wave quarkonium wave functions
|\psi_n(0)|^2 at the origin from non-Coulomb potentials in the effective
non-relativistic Lagrangian. Together with previous results on the Coulomb
correction and the ultrasoft correction computed in a companion paper, this
completes the third-order calculation up to a few unknown matching
coefficients. Numerical estimates of the new correction for bottomonium and
toponium are given.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 05:39:40 GMT"
},
{
"version": "v2",
"created": "Mon, 3 Mar 2008 13:20:17 GMT"
}
] | 2010-04-05T00:00:00 | [
[
"Beneke",
"M.",
"",
"RWTH Aachen"
],
[
"Kiyo",
"Y.",
"",
"U. Karlsruhe"
],
[
"Schuller",
"K.",
"",
"RWTH\n Aachen"
]
] |
0705.4519 | Boris Levin | B.M.Levin | The Orthopositronium Problem and e-\mu-\tau-Universality | 5 pages | null | null | null | physics.gen-ph | null | The quantitative description of the orthopositronium anomalies ("isotope
anomaly" in a gaseous neon for the "resonance conditions" and
"lambda{T}-anomaly" in non-resonance conditions) is possible on the basis of a
hypothesis about restoration of spontaneously broken complete relativity
(A.F.Andreev, 1982) of the limited space-time "volume" ("defect" of the
space-time) in a final state of the beta{+}-decay of nucleus such as Na-22,
Ga-68, etc. This addition of the Standard Model in a final state of the
topological quantum transition (non-steady-state, a generalized displacement
current) supposes the description on the common basis timelike fundamental
particles (locality) and spacelike fundamental structure (non-locality without
causal paradoxes). One of achievements of expansion of Standard Model can be a
substantiation of topological connection e-mu-tau-Universality with discrete
structure (quantization) "defect" of the space-time.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 05:44:37 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Levin",
"B. M.",
""
]
] |
0705.4520 | Atsushi Uchida | Kazuyuki Yoshimura, Peter Davis, and Atsushi Uchida | Nonresonant entrainment of detuned oscillators induced by common
external noise | 4 pages, 2 figures | null | null | null | nlin.CD | null | We have found that a novel type of entrainment occurs in two nonidentical
limit cycle oscillators subjected to a common external white Gaussian noise.
This entrainment is anomalous in the sense that the two oscillators have
different mean frequencies, where the difference is constant as the noise
intensity increases, but their phases come to be locked for almost all the
time. We present a theory and numerical evidence for this phenomenon.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 05:58:45 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Yoshimura",
"Kazuyuki",
""
],
[
"Davis",
"Peter",
""
],
[
"Uchida",
"Atsushi",
""
]
] |
0705.4521 | Igor Kostyukov | I. Kostyukov, E. Nerush, and A. Pukhov | Radiative Losses in Plasma Accelerators | 17 pages, 5 figures | J.Exp.Theor.Phys.103:800-807,2006 | 10.1134/S1063776106110173 | null | physics.acc-ph physics.plasm-ph | null | We investigate the dynamics of a relativistic electron in a strongly
nonlinear plasma wave in terms of classical mechanics by taking into account
the action of the radiative reaction force. The two limiting cases are
considered. In the first case where the energy of the accelerated electrons is
low, the electron makes many betatron oscillations during the acceleration. In
the second case where the energy of the accelerated electrons is high, the
betatron oscillation period is longer than the electron residence time in the
accelerating phase. We show that the force of radiative friction can severely
limit the rate of electron acceleration in a plasma accelerator.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 13:38:02 GMT"
}
] | 2010-11-11T00:00:00 | [
[
"Kostyukov",
"I.",
""
],
[
"Nerush",
"E.",
""
],
[
"Pukhov",
"A.",
""
]
] |
0705.4522 | Peter Rohde | Peter P. Rohde, William J. Munro, Timothy C. Ralph, Peter van Loock,
Kae Nemoto | Practical effects in the preparation of cluster states using weak
non-linearities | 8 pages, 5 figures | QIC 8, 0053 (2008) | null | null | quant-ph | null | We discuss experimental effects in the implementation of a recent scheme for
performing bus mediated entangling operations between qubits. Here a bus mode,
a strong coherent state, successively undergoes weak Kerr-type non-linear
interactions with qubits. A quadrature measurement on the bus then projects the
qubits into an entangled state. This approach has the benefit that entangling
gates are non-destructive, may be performed non-locally, and there is no need
for efficient single photon detection. In this paper we examine practical
issues affecting its experimental implementation. In particular, we analyze the
effects of post-selection errors, qubit loss, bus loss, mismatched coupling
rates and mode-mismatch. We derive error models for these effects and relate
them to realistic fault-tolerant thresholds, providing insight into realistic
experimental requirements.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 06:10:32 GMT"
}
] | 2008-05-19T00:00:00 | [
[
"Rohde",
"Peter P.",
""
],
[
"Munro",
"William J.",
""
],
[
"Ralph",
"Timothy C.",
""
],
[
"van Loock",
"Peter",
""
],
[
"Nemoto",
"Kae",
""
]
] |
0705.4523 | Hiroto Kobayashi | Hiroto Kobayashi | Anomaly in Symplectic Integrator | 6 pages, no figure | null | 10.1016/j.physleta.2007.06.037 | null | math-ph math.MP | null | Effective Liouville operators of the first- and the second-order symplectic
integrators are obtained for the one-dimensional harmonic-oscillator system.
The operators are defined only when the time step is less than two. Absolute
values of the coordinate and the momentum monotonically increase for large time
steps.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 06:18:24 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Kobayashi",
"Hiroto",
""
]
] |
0705.4524 | Isaiah Lankham | Isaiah Lankham | Patience Sorting and Its Generalizations | Ph.D. dissertation, 108 pages; uses packages pstricks and youngtab | null | null | null | math.CO | null | This dissertation collects together results on Patience Sorting and its
generalizations. It incorporates the results of math.CO/0506358,
math.CO/0507031, and math.CO/0512122, as well as previously unpublished
results.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 06:28:49 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Lankham",
"Isaiah",
""
]
] |
0705.4525 | Gary Goldstein | Gary R. Goldstein (1) and Kameshwar C. Wali (2) ((1) Tufts University,
(2) Syracuse University) | Baryons and Mesons with Beauty | 9 pages, 5 figures, plain LateX | null | null | null | hep-ph | null | Recent experimental findings of several mesons and baryons with "beauty" and
"charm" as flavors remind us of the days when strangeness was discovered, and
how its inclusion led to SU(3)-flavor symmetry with enormous success in the
classification of the "proliferated" states into SU(3) multiplets. One of the
key elements was the successful application of the first order perturbation in
symmetry breaking, albeit what then appeared to be huge mass differences, and
the prediction of new states that were confirmed by experiments. In this note,
we venture into the past and, applying the same techniques, predict some new
"beauty-" and "charm-" flavored hadrons. If these new states are confirmed
experimentally, it may provide a useful phenomenological model for classifying
numerous states that are found to be in the PDG data and could invite further
theoretical challenges towards our understanding of symmetry breaking.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 06:34:06 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Goldstein",
"Gary R.",
""
],
[
"Wali",
"Kameshwar C.",
""
]
] |
0705.4526 | Stephane Grevy | B. Bastin, S. Gr\'evy, D. Sohler, O. Sorlin, Zs. Dombr\'adi, N. L.
Achouri, J. C. Ang\'elique, F. Azaiez, D. Baiborodin, R. Borcea, C.
Bourgeois, A. Buta, A. B\"urger, R. Chapman, J. C. Dalouzy, Z. Dlouhy, A.
Drouard, Z. Elekes, S. Franchoo, S. Iacob, B. Laurent, M. Lazar, X. Liang, E.
Li\'enard, J. Mrazek, L. Nalpas, F. Negoita, N. A. Orr, Y. Penionzhkevich,
Zs. Podoly\'ak, F. Pougheon, P. Roussel-Chomaz, M. G. Saint-Laurent, M.
Stanoiu, I. Stefan, F. Nowacki and A. Poves | Collapse of the N=28 shell closure in $^{42}$Si | 4 pages, 3 figures, accepted for publication in Phys. Rev. lett | Phys.Rev.Lett.99:022503,2007 | 10.1103/PhysRevLett.99.022503 | null | nucl-ex | null | The energies of the excited states in very neutron-rich $^{42}$Si and
$^{41,43}$P have been measured using in-beam $\gamma$-ray spectroscopy from the
fragmentation of secondary beams of $^{42,44}$S at 39 A.MeV. The low 2$^+$
energy of $^{42}$Si, 770(19) keV, together with the level schemes of
$^{41,43}$P provide evidence for the disappearance of the Z=14 and N=28
spherical shell closures, which is ascribed mainly to the action of
proton-neutron tensor forces. New shell model calculations indicate that
$^{42}$Si is best described as a well deformed oblate rotor.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 06:34:38 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Bastin",
"B.",
""
],
[
"Grévy",
"S.",
""
],
[
"Sohler",
"D.",
""
],
[
"Sorlin",
"O.",
""
],
[
"Dombrádi",
"Zs.",
""
],
[
"Achouri",
"N. L.",
""
],
[
"Angélique",
"J. C.",
""
],
[
"Azaiez",
"F.",
""
],
[
"Baiborodin",
"D.",
""
],
[
"Borcea",
"R.",
""
],
[
"Bourgeois",
"C.",
""
],
[
"Buta",
"A.",
""
],
[
"Bürger",
"A.",
""
],
[
"Chapman",
"R.",
""
],
[
"Dalouzy",
"J. C.",
""
],
[
"Dlouhy",
"Z.",
""
],
[
"Drouard",
"A.",
""
],
[
"Elekes",
"Z.",
""
],
[
"Franchoo",
"S.",
""
],
[
"Iacob",
"S.",
""
],
[
"Laurent",
"B.",
""
],
[
"Lazar",
"M.",
""
],
[
"Liang",
"X.",
""
],
[
"Liénard",
"E.",
""
],
[
"Mrazek",
"J.",
""
],
[
"Nalpas",
"L.",
""
],
[
"Negoita",
"F.",
""
],
[
"Orr",
"N. A.",
""
],
[
"Penionzhkevich",
"Y.",
""
],
[
"Podolyák",
"Zs.",
""
],
[
"Pougheon",
"F.",
""
],
[
"Roussel-Chomaz",
"P.",
""
],
[
"Saint-Laurent",
"M. G.",
""
],
[
"Stanoiu",
"M.",
""
],
[
"Stefan",
"I.",
""
],
[
"Nowacki",
"F.",
""
],
[
"Poves",
"A.",
""
]
] |
0705.4527 | Kazuki Hasebe | Kazuki Hasebe | Unification of Laughlin and Moore-Read States in SUSY Quantum Hall
Effect | 5 pages, 1 figure, typos fixed | Phys.Lett.A372:1516-1520, 2008 | 10.1016/j.physleta.2007.09.071 | null | cond-mat.mes-hall cond-mat.supr-con hep-th | null | Based on the recently proposed SUSY quantum Hall effect, we show that
Laughlin and Moore-Read states are related by a hidden SUSY transformation.
Regarding the SUSY Laughlin wavefunction as a master wavefunction, Laughlin and
Moore-Read states appear as two extreme limits of component wavefunctions.
Realizations of topological excitations on Laughlin and Moore-Read states are
also discussed in the SUSY formalism. We develop a streographically projected
formulation of the SUSY quantum Hall effect. With appropriate interpretation of
Grassmann odd coordinates, we illustrate striking analogies between SUSY
quantum Hall effect and superfluidity.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 06:36:33 GMT"
},
{
"version": "v2",
"created": "Wed, 7 May 2008 18:52:29 GMT"
}
] | 2010-01-15T00:00:00 | [
[
"Hasebe",
"Kazuki",
""
]
] |
0705.4528 | Pekko Mets\"a | P. Mets\"a | Forward analysis of $\pi$N scattering with an expansion method | 5 pages, 4 figures. v2: Added some references. v3: Corrected
hyphenation | Eur.Phys.J.A33:349-353,2007 | 10.1140/epja/i2007-10460-0 | HIP-2007-20/TH | hep-ph | null | The $\pi$N forward scattering data are analyzed using an expansion method,
where the invariant amplitudes are represented by expansions satisfying the
forward dispersion relations. The experimental errors of the data are taken
into account through the covariance matrix of the coefficients of the
expansions in a careful error analysis. From the results, some coefficients,
$c_{n0}^\pm$, of the subthreshold expansions have been calculated with proper
error bars.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 07:15:56 GMT"
},
{
"version": "v2",
"created": "Fri, 7 Sep 2007 08:05:39 GMT"
},
{
"version": "v3",
"created": "Thu, 13 Sep 2007 09:12:43 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Metsä",
"P.",
""
]
] |
0705.4529 | Ahmed Zeriahi | Dan Coman, Vincent Guedj, Ahmed Zeriahi | Domains of definition of Monge-Amp\`ere operators on compact K\"ahler
manifolds | null | null | null | null | math.CV math.DG | null | Let $(X,\omega)$ be a compact K\"ahler manifold. We introduce and study the
largest set $DMA(X,\omega)$ of $\omega$-plurisubharmonic (psh) functions on
which the complex Monge-Amp\`ere operator is well defined. It is much larger
than the corresponding local domain of definition, though still a proper subset
of the set $PSH(X,\om)$ of all $\om$-psh functions. We prove that certain
twisted Monge-Amp\`ere operators are well defined for all $\omega$-psh
functions. As a consequence, any $\om$-psh function with slightly attenuated
singularities has finite weighted Monge-Amp\`ere energy.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 07:25:31 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Coman",
"Dan",
""
],
[
"Guedj",
"Vincent",
""
],
[
"Zeriahi",
"Ahmed",
""
]
] |
0705.4530 | Hans-Bert Rademacher | Hans-Bert Rademacher | The Length of a Shortest Geodesic Loop | 4 pages | null | null | null | math.DG | null | We give a lower bound for the length of a non-trivial geodesic loop on a
simply-connected and compact manifold of even dimension with a non-reversible
Finsler metric of positive flag curvature. Harris and Paternain use this
estimate in their recent paper [HP] to give a geometric characterization of
dynamically convex Finsler metrics on the 2-sphere.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 07:30:51 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Rademacher",
"Hans-Bert",
""
]
] |
0705.4531 | Ulisse Stefanelli | Riccarda Rossi, Antonio Segatti, Ulisse Stefanelli | Attractors for gradient flows of non convex functionals and applications | 46 pages | null | null | Preprint IMATI-CNR, 6-PV, 2006 | math.AP | null | This paper addresses the long-time behavior of gradient flows of non convex
functionals in Hilbert spaces. Exploiting the notion of generalized semiflows
by J. M. Ball, we provide some sufficient conditions for the existence of a
global attractor. The abstract results are applied to various classes of non
convex evolution problems. In particular, we discuss the long-time behavior of
solutions of quasi-stationary phase field models and prove the existence of a
global attractor.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 07:38:28 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Rossi",
"Riccarda",
""
],
[
"Segatti",
"Antonio",
""
],
[
"Stefanelli",
"Ulisse",
""
]
] |
0705.4532 | Donatella Iacono | Donatella Iacono | L-infinity Algebras and Deformations of Holomorphic Maps | Revised Version; 26 pages | Internat. Math. Res. Notices (2008); Vol. 2008, article ID rnn013,
36 pages | null | null | math.AG math.QA | null | We construct the deformation functor associated with a pair of morphisms of
differential graded Lie algebras, and use it to study infinitesimal
deformations of holomorphic maps of compact complex manifolds. In particular,
using L-infinity structures, we give an explicit description of the
differential graded Lie algebra that controls this problem.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 07:56:08 GMT"
},
{
"version": "v2",
"created": "Thu, 3 Apr 2008 13:17:03 GMT"
}
] | 2008-04-03T00:00:00 | [
[
"Iacono",
"Donatella",
""
]
] |
0705.4533 | Diego Julio Cirilo-Lombardo | Diego.J. Cirilo-Lombardo | Quantum field propagator for extended-objects in the microcanonical
ensemble and the S-matrix formulation | Seminar at BLTP, Non-Pertuirbative methods in QFT (Scientific
Leaders:A. Dorokhov, E. Kuraev) | Phys.Lett.B637:133-138,2006 | 10.1016/j.physletb.2006.04.004 | null | hep-th | null | Starting with the well-known Nambu-Goto action for an N-extended body system
the propagator in the microcanonical ensemble is explicitly computed. This
propagator is independent of the temperature and, in contrast with the previous
references, takes account on all the non-local effects produced by the extended
objects (e.g., strings) in interaction. The relation between relativistic
quantum field theories in the microcanonical approach and the pure S-matrix
formulation is stablished and analyzed.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 07:59:05 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Cirilo-Lombardo",
"Diego. J.",
""
]
] |
0705.4534 | Wouter Kager | Remco van der Hofstad and Wouter Kager | Pattern theorems, ratio limit theorems and Gumbel maximal clusters for
random fields | 23 pages, 2 figures | J. Stat. Phys. 130(3):503-522 (2008) | 10.1007/s10955-007-9435-5 | EURANDOM Report 2007-031 | math.PR math-ph math.MP | null | We study occurrences of patterns on clusters of size n in random fields on
Z^d. We prove that for a given pattern, there is a constant a>0 such that the
probability that this pattern occurs at most an times on a cluster of size n is
exponentially small. Moreover, for random fields obeying a certain Markov
property, we show that the ratio between the numbers of occurrences of two
distinct patterns on a cluster is concentrated around a constant value. This
leads to an elegant and simple proof of the ratio limit theorem for these
random fields, which states that the ratio of the probabilities that the
cluster of the origin has sizes n+1 and n converges as n tends to infinity.
Implications for the maximal cluster in a finite box are discussed.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:15:47 GMT"
}
] | 2008-03-13T00:00:00 | [
[
"van der Hofstad",
"Remco",
""
],
[
"Kager",
"Wouter",
""
]
] |
0705.4535 | Robert Osburn | Jeremy Lovejoy and Robert Osburn | M_2-rank differences for partitions without repeated odd parts | 18 pages | Journal de Theorie des Nombres de Bordeaux 21 (2009), 313-334 | 10.5802/jtnb.673 | null | math.NT math.CO | null | We prove formulas for the generating functions for M_2-rank differences for
partitions without repeated odd parts. These formulas are in terms of modular
forms and generalized Lambert series.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:16:25 GMT"
}
] | 2021-02-03T00:00:00 | [
[
"Lovejoy",
"Jeremy",
""
],
[
"Osburn",
"Robert",
""
]
] |
0705.4536 | Vsevolod Lev | Jean-Marc Deshouillers and Vsevolod F. Lev | Refined bound for sum-free sets in groups of prime order | null | null | 10.1112/blms/bdn068 | null | math.NT math.CO | null | Improving upon earlier results of Freiman and the present authors, we show
that if $p$ is a sufficiently large prime and $A$ is a sum-free subset of the
group of order $p$, such that $n:=|A|>0.318p$, then $A$ is contained in a
dilation of the interval $[n,p-n]\pmod p$.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:17:01 GMT"
}
] | 2014-02-26T00:00:00 | [
[
"Deshouillers",
"Jean-Marc",
""
],
[
"Lev",
"Vsevolod F.",
""
]
] |
0705.4537 | Rok Zitko | Rok Zitko Janez Bonca | Correlation Effects in Side-Coupled Quantum Dots | 13 pages, 10 figures | J. Phys.: Condens. Matter 19 255205 (2007) | 10.1088/0953-8984/19/25/255205 | null | cond-mat.str-el | null | Using Wilson's numerical renormalization group (NRG) technique we compute
zero-bias conductance and various correlation functions of a double quantum dot
(DQD) system. We present different regimes within a phase diagram of the DQD
system. By introducing a negative Hubbard U on one of the quantum dots, we
simulate the effect of electron-phonon coupling and explore the properties of
the coexisting spin and charge Kondo state. In a triple quantum dot (TQD)
system a multi-stage Kondo effect appears where localized moments on quantum
dots are screened successively at exponentially distinct Kondo temperatures.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:32:06 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Bonca",
"Rok Zitko Janez",
""
]
] |
0705.4538 | Hua Wu | Hua Wu, Z. Hu, D.I. Khomskii, and L.H. Tjeng | Insulating state and the importance of the spin-orbit coupling in
Ca$_3$CoRhO$_6$ | 7 pages, 4 figures, and 1 table | Phys. Rev. B 75, 245118 (2007) | 10.1103/PhysRevB.75.245118 | null | cond-mat.str-el | null | We have carried out a comparative theoretical study of the electronic
structure of the novel one-dimensional Ca$_3$CoRhO$_6$ and Ca$_3$FeRhO$_6$
systems. The insulating antiferromagnetic state for the Ca$_3$FeRhO$_6$ can be
well explained by band structure calculations with the closed shell high-spin
$d^5$ (Fe$^{3+}$) and low-spin $t_{2g}^{6}$ (Rh$^{3+}$) configurations. We
found for the Ca$_3$CoRhO$_6$ that the Co has a strong tendency to be $d^7$
(Co$^{2+}$) rather than $d^6$ (Co$^{3+}$), and that there is an orbital
degeneracy in the local Co electronic structure. We argue that it is the
spin-orbit coupling which will lift this degeneracy thereby enabling local spin
density approximation + Hubbard U (LSDA+U) band structure calculations to
generate the band gap. We predict that the orbital contribution to the magnetic
moment in Ca$_3$CoRhO$_6$ is substantial, i.e. significantly larger than 1
$\mu_B$ per formula unit. Moreover, we propose a model for the contrasting
intra-chain magnetism in both materials.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:34:33 GMT"
}
] | 2007-06-21T00:00:00 | [
[
"Wu",
"Hua",
""
],
[
"Hu",
"Z.",
""
],
[
"Khomskii",
"D. I.",
""
],
[
"Tjeng",
"L. H.",
""
]
] |
0705.4539 | Lin Weiqiang Dr. | Weiqiang Lin, Yucai Su | Classification of quasifinite representations with nonzero central
charges for type $A_1$ EALA with coordinates in quantum torus | 28 pages | null | null | null | math.QA math.RT | null | In this paper, we first construct a Lie algebra $L$ from rank 3 quantum
torus, and show that it is isomorphic to the core of EALAs of type $A_1$ with
coordinates in rank 2 quantum torus. Then we construct two classes of
irreducible ${\bf Z}$-graded highest weight representations, and give the
necessary and sufficient conditions for these representations to be
quasifinite. Next, we prove that they exhaust all the generalized highest
weight irreducible ${\bf Z}$-graded quasifinite representations. As a
consequence, we determine all the irreducible ${\bf Z}$-graded quasifinite
representations with nonzero central charges. Finally, we construct two classes
of highest weight ${\bf Z}^2$-graded quasifinite representations by using these
${\bf Z}$-graded modules.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:38:51 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Lin",
"Weiqiang",
""
],
[
"Su",
"Yucai",
""
]
] |
0705.4540 | Yusuke Sasano | Yusuke Sasano | Coupled Painlev\'e systems with affine Weyl group symmetry of types
$D_3^{(2)}$ and $D_5^{(2)}$ | 8 pages | null | null | null | math.AG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we find a two-parameter family of coupled Painlev\'e systems
in dimension four with affine Weyl group symmetry of type $D_3^{(2)}$. We also
find a four-parameter family of 2-coupled $D_3^{(2)}$-systems in dimension
eight with affine Weyl group symmetry of type $D_5^{(2)}$. We show that for
each system, we give its symmetry and holomorphy conditions, respectively.
These symmetries, holomorphy conditions and invariant divisors are new.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:39:00 GMT"
},
{
"version": "v2",
"created": "Fri, 13 Nov 2009 14:11:17 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Sasano",
"Yusuke",
""
]
] |
0705.4541 | Jens Jasche | Jens Jasche, Benedetta Ciardi, Torsten A. Ensslin | Cosmic rays and the primordial gas | 15 pages, 5 figures | null | 10.1111/j.1365-2966.2007.12058.x | null | astro-ph | null | One of the most outstanding problems in the gravitational collapse scenario
of early structure formation is the cooling of primordial gas to allow for
small mass objects to form. As the neutral primordial gas is a poor radiator at
temperatures (T\le10^4\unit{K}), molecular hydrogen is needed for further
cooling down to temperatures (T\sim100\unit{K}). The formation of molecular
hydrogen is catalyzed by the presence of free electrons, which could be
provided by the ionization due to an early population of cosmic rays. In order
to investigate this possibility we developed a code to study the effects of
ionizing cosmic rays on the thermal and chemical evolution of primordial gas.
We found that cosmic rays can provide enough free electrons needed for the
formation of molecular hydrogen, and therefore can increase the cooling ability
of such primordial gas under following conditions: A dissociating photon flux
with (F<10^{-18}\unit{erg cm^{-2} Hz^{-1} s^{-1}}), initial temperature of the
gas (\sim10^{3}\unit{K}), total gas number densities (n\ge1\unit{cm^{-3}}),
Cosmic ray sources with (\dot{\epsilon}_{CR}>10^{-33}\unit{erg cm^{-3}
s^{-1}}).
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:46:05 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Jasche",
"Jens",
""
],
[
"Ciardi",
"Benedetta",
""
],
[
"Ensslin",
"Torsten A.",
""
]
] |
0705.4542 | Alan Cornell | T. M. Aliev, A. S. Cornell and Naveen Gaur | B \to K(K^*) missing energy in Unparticle physics | 13 pages, 5 figures | JHEP 0707:072,2007 | 10.1088/1126-6708/2007/07/072 | null | hep-ph | null | In the present work we study the effects of an unparticle $\unpart$ as the
possible source of missing energy in the decay $B \to K (K^*) + {\rm missing
energy}$. We find that the dependence of the differential branching ratio on
the $K$($K^*$)-meson's energy in the presence of the vector unparticle
operators is very distinctive from that of the SM. Moreover, in using the
existing upper bound on $B \to K (K^*) + {\rm missing energy}$ decays, we have
been able to put more stringent constraints on the parameters of unparticle
stuff.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 08:49:43 GMT"
}
] | 2009-04-21T00:00:00 | [
[
"Aliev",
"T. M.",
""
],
[
"Cornell",
"A. S.",
""
],
[
"Gaur",
"Naveen",
""
]
] |
0705.4543 | Wynn C. G. Ho | Wynn C. G. Ho (Harvard-Smithsonian CfA) | Constraining the Geometry of the Neutron Star RX J1856.5-3754 | 7 pages, 6 figures; MNRAS, accepted | Mon.Not.Roy.Astron.Soc.380:71-77, 2007 | 10.1111/j.1365-2966.2007.12043.x | null | astro-ph | null | RX J1856.5-3754 is one of the brightest, nearby isolated neutron stars, and
considerable observational resources have been devoted to its study. In
previous work, we found that our latest models of a magnetic, hydrogen
atmosphere matches well the entire spectrum, from X-rays to optical (with
best-fitting neutron star radius R=14 km, gravitational redshift z_g~0.2, and
magnetic field B~4x10^12 G). A remaining puzzle is the non-detection of
rotational modulation of the X-ray emission, despite extensive searches. The
situation changed recently with XMM-Newton observations that uncovered 7 s
pulsations at the 1% level. By comparing the predictions of our model (which
includes simple dipolar-like surface distributions of magnetic field and
temperature) with the observed brightness variations, we are able to constrain
the geometry of RX J1856.5-3754, with one angle < 6 deg and the other angle =
20-45 deg, though the solutions are not definitive given the observational and
model uncertainties. These angles indicate a close alignment between the
rotation and magnetic axes or between the rotation axis and the observer. We
discuss our results in the context of RX J1856.5-3754 being a normal radio
pulsar and a candidate for observation by future X-ray polarization missions
such as Constellation-X or XEUS.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:04:28 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ho",
"Wynn C. G.",
"",
"Harvard-Smithsonian CfA"
]
] |
0705.4544 | Tobias Mueller | T. M\"uller, T. Wendrich, M. Gilowski, C. Jentsch, E.M. Rasel, and W.
Ertmer | Versatile compact atomic source for high resolution dual atom
interferometry | uses revtex4, 9 pages, 12 figures, submitted to Phys. Rev. A | null | 10.1103/PhysRevA.76.063611 | null | physics.atom-ph | null | We present a compact $^{87}$Rb atomic source for high precision dual atom
interferometers. The source is based on a double-stage magneto-optical trap
(MOT) design, consisting of a 2-dimensional (2D)-MOT for efficient loading of a
3D-MOT. The accumulated atoms are precisely launched in a horizontal moving
molasses. Our setup generates a high atomic flux ($>10^{10}$ atoms/s) with
precise and flexibly tunable atomic trajectories as required for high
resolution Sagnac atom interferometry. We characterize the performance of the
source with respect to the relevant parameters of the launched atoms, i.e.
temperature, absolute velocity and pointing, by utilizing time-of-flight
techniques and velocity selective Raman transitions.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:10:30 GMT"
}
] | 2016-08-14T00:00:00 | [
[
"Müller",
"T.",
""
],
[
"Wendrich",
"T.",
""
],
[
"Gilowski",
"M.",
""
],
[
"Jentsch",
"C.",
""
],
[
"Rasel",
"E. M.",
""
],
[
"Ertmer",
"W.",
""
]
] |
0705.4545 | Jeffrey Giansiracusa | Jeffrey Giansiracusa | The diffeomorphism group of a K3 surface and Nielsen realization | 20 pages, published version. ERRATUM: This paper is withdrawn. As
pointed out by Bena Tshishiku, Borel's theorem on the cohomology stable range
for arithmetic groups is incorrectly quoted and applied in this paper; in the
case relevant to K3 surfaces the range is unfortunately zero. Hence the proof
of the part of Theorem 1.1 referring to K3 surfaces is fundamentally broken.
See arXiv:1711.03139 | null | 10.1112/jlms/jdp002 | null | math.GT math.AT math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Nielsen Realization problem asks when the group homomorphism from Diff(M)
to pi_0 Diff(M) admits a section. For M a closed surface, Kerckhoff proved that
a section exists over any finite subgroup, but Morita proved that if the genus
is large enough then no section exists over the entire mapping class group. We
prove the first nonexistence theorem of this type in dimension 4: if M is a
smooth closed oriented 4-manifold which contains a K3 surface as a connected
summand then no section exists over the whole of the mapping class group. This
is done by showing that certain obstructions lying in the rational cohomology
of B(pi_0 Diff(M)) are nonzero. We detect these classes by showing that they
are nonzero when pulled back to the moduli space of Einstein metrics on a K3
surface.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:00:50 GMT"
},
{
"version": "v2",
"created": "Thu, 15 Jan 2009 14:24:24 GMT"
},
{
"version": "v3",
"created": "Sun, 12 Nov 2017 20:27:26 GMT"
}
] | 2017-11-15T00:00:00 | [
[
"Giansiracusa",
"Jeffrey",
""
]
] |
0705.4546 | Anatol N. Kirillov | Anatol N. Kirillov | Skew Divided Difference Operators and Schubert Polynomials | This is a contribution to the Vadim Kuznetsov Memorial Issue on
Integrable Systems and Related Topics, published in SIGMA (Symmetry,
Integrability and Geometry: Methods and Applications) at
http://www.emis.de/journals/SIGMA/ | SIGMA 3 (2007), 072, 14 pages | 10.3842/SIGMA.2007.072 | null | math.QA math.CA math.CO | null | We study an action of the skew divided difference operators on the Schubert
polynomials and give an explicit formula for structural constants for the
Schubert polynomials in terms of certain weighted paths in the Bruhat order on
the symmetric group. We also prove that, under certain assumptions, the skew
divided difference operators transform the Schubert polynomials into
polynomials with positive integer coefficients.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:01:06 GMT"
}
] | 2008-04-24T00:00:00 | [
[
"Kirillov",
"Anatol N.",
""
]
] |
0705.4547 | Amol Dighe | Amol Dighe (Tata Inst.), Anirban Kundu and Soumitra Nandi (Calcutta
U.) | Possibility of large lifetime differences in neutral B meson systems | 20 pages, 9 eps figures, revtex4 format | Phys.Rev.D76:054005,2007 | 10.1103/PhysRevD.76.054005 | CU-PHYSICS/08-2007, TIFR/TH/07-09 | hep-ph | null | We investigate new physics models that can increase the lifetime differences
in the $B_q$--$\bar{B}_q$ systems ($q = d,s$) above their standard model
values. If both $B_q$ as well as $\bar{B}_q$ can decay to a final state through
flavour dependent new physics interactions, the so-called Grossman bound may be
evaded. As examples, we consider the scalar leptoquark model and
$\lambda''$-type R-parity violating supersymmetry. We find that models with a
scalar leptoquark can enhance $\Delta\Gamma_s/\Gamma_s$ all the way up to its
experimental upper bound and $\Delta\Gamma_d/\Gamma_d$ to as much as $\sim
2.5%$, at the same time allowing the CP violating phase $\beta_s$ to vary
between $- 45^\circ$ and $20^\circ$. R-parity violating supersymmetry models
cannot enhance the lifetime differences significantly, but can enhance the
value of $\beta_s$ up to $\sim \pm 20^\circ$. This may bring the values of
$\Delta\Gamma_q/\Gamma_q$ as well as $\beta_s$ within the measurement
capabilities of $B$ factories and LHCb. We also obtain bounds on combinations
of these new physics couplings, and predict enhanced branching ratios of
$B_{s/d} \to \tau^+ \tau^-$.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:46:24 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Dighe",
"Amol",
"",
"Tata Inst."
],
[
"Kundu",
"Anirban",
"",
"Calcutta\n U."
],
[
"Nandi",
"Soumitra",
"",
"Calcutta\n U."
]
] |
0705.4548 | Iain Moffatt | Martin Loebl and Iain Moffatt | A permanent formula for the Jones polynomial | To appear in Advances in Applied Mathematics | Adv. in Appl. Math., 47 (2011) 659-667 | 10.1016/j.aam.2011.03.003 | null | math.QA math.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The permanent of a square matrix is defined in a way similar to the
determinant, but without using signs. The exact computation of the permanent is
hard, but there are Monte-Carlo algorithms that can estimate general
permanents. Given a planar diagram of a link L with $n$ crossings, we define a
7n by 7n matrix whose permanent equals to the Jones polynomial of L. This
result accompanied with recent work of Freedman, Kitaev, Larson and Wang
provides a Monte-Carlo algorithm to any decision problem belonging to the class
BQP, i.e. such that it can be computed with bounded error in polynomial time
using quantum resources.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:15:15 GMT"
},
{
"version": "v2",
"created": "Tue, 25 Aug 2009 16:59:32 GMT"
},
{
"version": "v3",
"created": "Fri, 11 Feb 2011 23:02:10 GMT"
}
] | 2012-03-01T00:00:00 | [
[
"Loebl",
"Martin",
""
],
[
"Moffatt",
"Iain",
""
]
] |
0705.4549 | Rajeev Bhalerao | Budh Ram | Quantum-theoretical description of the cosmological constant as the
zero-point energy | 7 pages | null | null | null | gr-qc astro-ph quant-ph | null | The present paper seeks to construct a quantum theory of the cosmological
constant in which its presently observed very small value emerges naturally.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:22:44 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Ram",
"Budh",
""
]
] |
0705.4550 | Fabien Trousselet | F. Trousselet, P. Pujol, F. Alet and D. Poilblanc | Criticality of a classical dimer model on the triangular lattice | 12 pages, 16 figures | PRE 76, 041125 (2007) | 10.1103/PhysRevE.76.041125 | null | cond-mat.stat-mech cond-mat.str-el | null | We consider a classical interacting dimer model which interpolates between
the square lattice case and the triangular lattice case by tuning a chemical
potential in the diagonal bonds. The interaction energy simply corresponds to
the number of plaquettes with parallel dimers. Using transfer matrix
calculations, we find in the anisotropic triangular case a succession of
different physical phases as the interaction strength is increased: a short
range disordered liquid dimer phase at low interactions, then a critical phase
similar to the one found for the square lattice, and finally a transition to an
ordered columnar phase for large interactions. The existence of the critical
phase is in contrast with the belief that criticality for dimer models is
ascribed to bipartiteness. For the isotropic triangular case, we have
indications that the system undergoes a first order phase transition to an
ordered phase, without appearance of an intermediate critical phase.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:38:53 GMT"
}
] | 2007-12-20T00:00:00 | [
[
"Trousselet",
"F.",
""
],
[
"Pujol",
"P.",
""
],
[
"Alet",
"F.",
""
],
[
"Poilblanc",
"D.",
""
]
] |
0705.4551 | Jean-Philippe Kownacki | J.-P. Kownacki | Site Percolation on Planar $\Phi^{3}$ Random Graphs | 8 pages, 10 figures. Accepted in Phys. Rev. E ; published version | Phys.Rev.E77:021121,2008 | 10.1103/PhysRevE.77.021121 | null | cond-mat.stat-mech hep-lat | null | In this paper, site percolation on random $\Phi^{3}$ planar graphs is studied
by Monte-Carlo numerical techniques. The method consists in randomly removing a
fraction $q=1-p$ of vertices from graphs generated by Monte-Carlo simulations,
where $p$ is the occupation probability. The resulting graphs are made of
clusters of occupied sites. By measuring several properties of their
distribution, it is shown that percolation occurs for an occupation probability
above a percolation threshold $p_{c}$=0.7360(5). Moreover, critical exponents
are compatible with those analytically known for bond percolation.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:49:00 GMT"
},
{
"version": "v2",
"created": "Wed, 4 Jul 2007 13:16:53 GMT"
},
{
"version": "v3",
"created": "Fri, 11 Jan 2008 08:27:47 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Kownacki",
"J. -P.",
""
]
] |
0705.4552 | Maxim Trushin | Maxim Trushin and A. L. Chudnovskiy | Tunneling into strongly biased Tomonaga-Luttinger liquid | 4 pages, 3 figs | EPL v. 82, 17008 (2008) | 10.1209/0295-5075/82/17008 | null | cond-mat.mes-hall cond-mat.str-el | null | We calculate the tunneling density of states for a Tomonaga-Luttinger liquid
placed under a strong bias voltage. For the tunneling through a side-coupled
point contact, one can observe the power law singularities in the tunneling
density of states separately for the right- and left-movers despite the
point-like tunnel contact. Deviations of the nonequilibrium tunneling exponents
from the equilibrium case are discussed.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 14:23:02 GMT"
}
] | 2011-02-04T00:00:00 | [
[
"Trushin",
"Maxim",
""
],
[
"Chudnovskiy",
"A. L.",
""
]
] |
0705.4553 | Nguyen Tu Cuong | Nguyen Tu Cuong and Nguyen Van Hoang | On the Vanishing and the Finiteness of Supports of Generalized Local
Cohomology Modules | 13 pages | null | null | null | math.AC math.RA | null | Let $(R,\fr m)$ be a Noetherian local ring, $I$ an ideal of $R$ and $M, N$
two finitely generated $R$-modules. The first result of this paper is to prove
a vanishing theorem for generalized local cohomology modules which says that
$H^j_I(M,N)=0$ for all $j>\dim(R)$, provided $M$ is of finite projective
dimension. Next, we study and give characterizations for the least and the last
integer $r$ such that $\Supp(H^r_I(M,N))$ is infinite.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:49:37 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Cuong",
"Nguyen Tu",
""
],
[
"Van Hoang",
"Nguyen",
""
]
] |
0705.4554 | Prasanta K. Tripathy | Suresh Nampuri, Prasanta K. Tripathy, Sandip P. Trivedi | On The Stability of Non-Supersymmetric Attractors in String Theory | 20 pages, Latex | JHEP 0708:054,2007 | 10.1088/1126-6708/2007/08/054 | IITM/PH/TH/2007/2, TIFR/TH/07-10 | hep-th | null | We study non-supersymmetric attractors obtained in Type IIA compactifications
on Calabi Yau manifolds. Determining if an attractor is stable or unstable
requires an algebraically complicated analysis in general. We show using group
theoretic techniques that this analysis can be considerably simplified and can
be reduced to solving a simple example like the STU model. For attractors with
D0-D4 brane charges, determining stability requires expanding the effective
potential to quartic order in the massless fields. We obtain the full set of
these terms. For attractors with D0-D6 brane charges, we find that there is a
moduli space of solutions and the resulting attractors are stable. Our analysis
is restricted to the two derivative action.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:52:49 GMT"
}
] | 2009-04-17T00:00:00 | [
[
"Nampuri",
"Suresh",
""
],
[
"Tripathy",
"Prasanta K.",
""
],
[
"Trivedi",
"Sandip P.",
""
]
] |
0705.4555 | Masao Iwamatsu | M. Iwamatsu and S. K. Lai | Lowest-energy structures of 13-atom binary clusters: Do icosahedral
clusters exist in binary liquid alloys? | 10 pages, 3 figure (conference paper of LAM12) to be published in J.
Non-Crystalline Solids | null | 10.1016/j.jnoncrysol.2007.05.134 | null | cond-mat.mtrl-sci | null | Although the existence of 13-atom icosahedral clusters in one-component
close-packed undercooled liquids was predicted more than half a century ago by
Frank, the existence of such icosahedral clusters is less clear in liquid
alloys. We study the lowest-energy structures of 13-atom AxB13-x Lennard-Jones
binary clusters using the modified space-fixed genetic algorithm and the
artificial Lennard-Jones potential designed by Kob and Andersen. Curiously, the
lowest-energy structures are non-icosahedral for almost all compositions. The
role played by the icosahedral cluster in a binary glass is questionable.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:53:47 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Iwamatsu",
"M.",
""
],
[
"Lai",
"S. K.",
""
]
] |
0705.4556 | Shamgar Gurevich | Shamgar Gurevich (UC Berkeley) and Ronny Hadani (University of
Chicago) | Quantization of symplectic vector spaces over finite fields | Results obtained: March 2005 (under the direction of Ph.D. advisor
Joseph Bernstein, Tel-Aviv, Israel) Keywords: Strong Stone-von Neumann
theorem, canonocal Hilbert space, quantization functor, Weil representation | Journal of Symplectic Geometry, Volume 7, Number 4, 1-28, 2009 | null | null | math.RT math-ph math.AG math.MP math.QA math.SG quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we construct a quantization functor, associating a complex
vector space H(V) to a finite dimensional symplectic vector space V over a
finite field of odd characteristic. As a result, we obtain a canonical model
for the Weil representation of the symplectic group Sp(V). The main new
technical result is a proof of a stronger form of the Stone-von Neumann
property for the Heisenberg group. Our result answers, for the case of the
Heisenberg group, a question of Kazhdan about the possible existence of a
canonical vector space attached to a coadjoint orbit of a general unipotent
group over finite field.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 09:59:52 GMT"
},
{
"version": "v2",
"created": "Fri, 10 Aug 2007 12:11:11 GMT"
},
{
"version": "v3",
"created": "Thu, 11 Sep 2008 06:30:07 GMT"
},
{
"version": "v4",
"created": "Thu, 20 Aug 2009 12:00:23 GMT"
}
] | 2009-08-20T00:00:00 | [
[
"Gurevich",
"Shamgar",
"",
"UC Berkeley"
],
[
"Hadani",
"Ronny",
"",
"University of\n Chicago"
]
] |
0705.4557 | Hans J. Deeg | C. Regulo (1,2), M. Almenara (1), R. Alonso (3), H.J. Deeg (1), T.
Roca Cortes (1,2) ((1) IAC, (2) U. La Laguna, (3) LAM) | TRUFAS, a wavelet based algorithm for the rapid detection of planetary
transits | 9 pages, 10 figures, accepted by A&A | Astron.Astrophys.467:1345,2007 | 10.1051/0004-6361:20066827 | null | astro-ph | null | Aims: We describe a fast, robust and automatic detection algorithm, TRUFAS,
and apply it to data that are being expected from the CoRoT mission. Methods:
The procedure proposed for the detection of planetary transits in light curves
works in two steps: 1) a continuous wavelet transformation of the detrended
light curve with posterior selection of the optimum scale for transit
detection, and 2) a period search in that selected wavelet transformation. The
detrending of the light curves are based on Fourier filtering or a discrete
wavelet transformation. TRUFAS requires the presence of at least 3 transit
events in the data. Results: The proposed algorithm is shown to identify
reliably and quickly the transits that had been included in a standard set of
999 light curves that simulate CoRoT data. Variations in the pre-processing of
the light curves and in the selection of the scale of the wavelet transform
have only little effect on TRUFAS' results. Conclusions: TRUFAS is a robust and
quick transit detection algorithm, especially well suited for the analysis of
very large volumes of data from space or ground-based experiments, with long
enough durations for the target-planets to produce multiple transit events.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:26:51 GMT"
}
] | 2009-11-16T00:00:00 | [
[
"Regulo",
"C.",
"",
"IAC",
"U. La Laguna"
],
[
"Almenara",
"M.",
"",
"IAC"
],
[
"Alonso",
"R.",
"",
"LAM"
],
[
"Deeg",
"H. J.",
"",
"IAC"
],
[
"Cortes",
"T. Roca",
"",
"IAC",
"U. La Laguna"
]
] |
0705.4558 | Elisabetta Pastori | Elisabetta Pastori | Almost-free finite covers | null | null | null | null | math.LO math.GR | null | Finite covers are a technique for building new structures from simpler ones.
The original motivation to study finite covers is in the Ladder theorem of
Zilber which describes how totally categorical structures are built from
strictly minimal sets by a sequence of covers.
Let W be a first-order structure and r be an Aut(W)-congruence on W. In this
paper we define the almost-free finite covers of W with respect to r, and we
show how to construct them. These are a generalization of free finite covers. A
consequence of a result of Evans and Hrushovski in the paper "On the
automorphism groups of finite covers" is that any finite cover of W with
binding groups all equal to a simple non-abelian permutation group is
almost-free with respect to some r on W. Our main result gives a description
(up to isomorphism) in terms of the Aut(W)-congruences on W of the kernels of
principal finite covers of W with bindings groups equal at any point to a
simple non-abelian regular permutation group G. Then we analyze almost-free
finite covers of the set of ordered n-tuples of distinct elements from a
countable set Omega, regarded as a structure with automorphism group equal to
the Sym(Omega) and we show a result of biinterpretability.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:05:07 GMT"
},
{
"version": "v2",
"created": "Sun, 3 Jun 2007 16:57:30 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Pastori",
"Elisabetta",
""
]
] |
0705.4559 | Alessandro Strumia | Yuji Kajiyama, Martti Raidal and Alessandro Strumia | The golden ratio prediction for the solar neutrino mixing | 5 pages. Final version, to appear on PRD | Phys.Rev.D76:117301,2007 | 10.1103/PhysRevD.76.117301 | IFUP-TH/11-2007 | hep-ph | null | We present a simple texture that predicts the cotangent of the solar neutrino
mixing angle to be equal to the golden ratio. This prediction is 1.4 standard
deviations below the present best-fit value and final SNO and KamLAND data
could discriminate it from tri-bi-maximal mixing. The neutrino mass matrix is
invariant under a Z_2 x Z'_2 symmetry: that geometrically is a reflection along
the diagonal of the golden rectangle. Assuming an analogous structure in the
quark sector suggests a golden prediction for the Cabibbo angle, theta_C =
pi/4- theta_12 = 13.3 degree, up to uncertainties comparable to V_{ub}.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:17:59 GMT"
},
{
"version": "v2",
"created": "Wed, 28 Nov 2007 08:06:11 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Kajiyama",
"Yuji",
""
],
[
"Raidal",
"Martti",
""
],
[
"Strumia",
"Alessandro",
""
]
] |
0705.4560 | Harinder Singh | Arvind C. Ranade, Harinder P. Singh, Ranjan Gupta, N. M. Ashok | A Near-Infrared Stellar Spectral Library: II. K-Band Spectra | 26 pages, 10 figures. Accepted for Publication in Bulletin of
Astronomical Society of India | null | null | null | astro-ph | null | This paper is the second in the series of papers on near-infrared (NIR)
stellar spectral library produced by reducing the observations carried out with
1.2 meter Gurushikhar Infrared Telescope (GIRT), at Mt. Abu, India using a
NICMOS3 HgCdTe 256 X 256 NIR array based spectrometer. In paper I (Ranade et
al. 2004), H-band spectra of 135 stars at a resolution of ~16 Ang were
presented. The K-band library being released now consists of 114 stars covering
spectral types O7--M7 and luminosity classes I--V. The spectra have a moderate
resolution of ~22 Ang in the K band and have been continuum shape corrected to
their respective effective temperatures. We hope to release the remaining
J-band spectra soon. The complete H and K-Band library is available online at:
http://vo.iucaa.ernet.in/~voi/NIR_Header.html
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:14:03 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Ranade",
"Arvind C.",
""
],
[
"Singh",
"Harinder P.",
""
],
[
"Gupta",
"Ranjan",
""
],
[
"Ashok",
"N. M.",
""
]
] |
0705.4561 | Nils Dencker | Nils Dencker | The Pseudospectrum of Systems of Semiclassical Operators | Introduced the notion of quasi-symmetric systems and proved
invariance properties for these systems. Changed the definition of the
approximation property in Definition 5.10. Skipped erroneous Remark 3.5 and
strengthened Proposition 3.7. Corrected an error in the proof of Proposition
6.1, added Lemma A.4 and some examples. The paper has 57 pages | Anal. PDE 1 (2008), 323--373. | null | null | math.AP math.SP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The pseudospectra (or spectral instability) of non-selfadjoint operators is a
topic of current interest in applied mathematics. In fact, for non-selfadjoint
operators the resolvent could be very large outside the spectrum, making the
numerical computation of the complex eigenvalues very hard. This has
importance, for example, in quantum mechanics, random matrix theory and fluid
dynamics.
The occurence of pseudospectra for non-selfadjoint semiclassical differential
operators is due to the existence of quasimodes, i.e., approximate local
solutions to the eigenvalue problem. For scalar operators, the quasimodes
appear since the bracket condition is not satisfied for topological reasons,
see the paper by Dencker, Sjostrand and Zworski in Comm. Pure Appl. Math. 57
(2004), 384-415.
In this paper we shall investigate how these result can be generalized to
square systems of semiclassical differential operators of principal type. These
are the systems whose principal symbol vanishes of first order on its kernel.
We show that the resolvent blows up as in the scalar case, except in a nowhere
dense set of degenerate values. We also define quasi-symmetrizable systems and
systems of subelliptic type for which we prove estimates on the resolvent.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 14:24:55 GMT"
},
{
"version": "v2",
"created": "Sun, 28 Oct 2007 19:43:27 GMT"
},
{
"version": "v3",
"created": "Mon, 18 Feb 2008 18:20:08 GMT"
},
{
"version": "v4",
"created": "Sat, 24 May 2008 12:41:17 GMT"
},
{
"version": "v5",
"created": "Fri, 11 Jul 2008 20:53:09 GMT"
},
{
"version": "v6",
"created": "Sun, 28 Dec 2008 17:47:53 GMT"
}
] | 2010-03-05T00:00:00 | [
[
"Dencker",
"Nils",
""
]
] |
0705.4562 | Andrei Kirilyuk | Andrei P. Kirilyuk | The Last Scientific Revolution | 20 pages, 94 refs | In: Against the Tide: A Critical Review by Scientists of How
Physics and Astronomy Get Done, edited by M. Lopez Corredoira and C. Castro
Perelman, Universal Publishers, Boca Raton (2008), p. 179-217 | null | null | physics.gen-ph | null | Critically growing problems of fundamental science organisation and content
are analysed with examples from physics and emerging interdisciplinary fields.
Their origin is specified and new science structure (organisation and content)
is proposed as a unified solution.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:21:12 GMT"
}
] | 2008-06-01T00:00:00 | [
[
"Kirilyuk",
"Andrei P.",
""
]
] |
0705.4563 | Nachi Gupta | Nachi Gupta | Kalman Filtering in the Presence of State Space Equality Constraints | 7 pages, to appear in the IEEE Proceedings of the 26th Chinese
Control Conference (2007) | null | null | null | physics.ao-ph physics.data-an | null | We discuss two separate techniques for Kalman Filtering in the presence of
state space equality constraints. We then prove that despite the lack of
similarity in their formulations, under certain conditions, the two methods
result in mathematically equivalent constrained estimate structures. We
conclude that the potential benefits of using equality constraints in Kalman
Filtering often outweigh the computational costs, and as such, equality
constraints, when present, should be enforced by way of one of these two
methods.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 15:12:34 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Gupta",
"Nachi",
""
]
] |
0705.4564 | Alexander Kuznetsov A | Alexander Kuznetsov (Saratov State University) | Boundary behaviour of Loewner Chains | 11 pages | null | null | null | math.CV math-ph math.DS math.MP | null | In paper found conditions that guarantee that solution of Loewner-Kufarev
equation maps unit disc onto domain with quasiconformal rectifiable boundary,
or it has continuation on closed unit disc, or it's inverse function has
continuation on closure of domain.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 14:21:53 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Kuznetsov",
"Alexander",
"",
"Saratov State University"
]
] |
0705.4565 | Enrique Ruiz Arriola | R. Higa, M. Pavon Valderrama and E. Ruiz Arriola | Renormalization of NN Interaction with Relativistic Chiral Two Pion
Exchange | 13 pages, 4 figures. Reference included. Typos corrected. Appendix
and discussion added | Phys.Rev.C77:034003,2008 | 10.1103/PhysRevC.77.034003 | null | nucl-th | null | The renormalization of the NN interaction with the Chiral Two Pion Exchange
Potential computed using relativistic baryon chiral perturbation theory is
considered. The short distance singularity reduces the number of counter-terms
to about a half as those in the heavy-baryon expansion. Phase shifts and
deuteron properties are evaluated and a general overall agreement is observed.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:28:27 GMT"
},
{
"version": "v2",
"created": "Mon, 4 Jun 2007 15:17:55 GMT"
},
{
"version": "v3",
"created": "Wed, 19 Sep 2007 08:44:15 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Higa",
"R.",
""
],
[
"Valderrama",
"M. Pavon",
""
],
[
"Arriola",
"E. Ruiz",
""
]
] |
0705.4566 | Bastian Wemmenhove | Bastian Wemmenhove and Bert Kappen | Loop corrections for message passing algorithms in continuous variable
models | null | null | null | null | cs.AI cs.LG | null | In this paper we derive the equations for Loop Corrected Belief Propagation
on a continuous variable Gaussian model. Using the exactness of the averages
for belief propagation for Gaussian models, a different way of obtaining the
covariances is found, based on Belief Propagation on cavity graphs. We discuss
the relation of this loop correction algorithm to Expectation Propagation
algorithms for the case in which the model is no longer Gaussian, but slightly
perturbed by nonlinear terms.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:35:07 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Wemmenhove",
"Bastian",
""
],
[
"Kappen",
"Bert",
""
]
] |
0705.4567 | Jernej Kamenik | Jan O. Eeg, Svjetlana Fajfer and Jernej Kamenik | Chiral loop corrections to weak decays of B mesons to positive and
negative parity charmed mesons | 10 pages, 4 figures | JHEP 0707:078,2007 | 10.1088/1126-6708/2007/07/078 | null | hep-ph | null | We determine chiral loop corrections to the B meson decay amplitudes to
positive and negative parity charmed mesons within a framework which combines
heavy quark and chiral symmetries. Then we investigate the impact of the
lowest-lying positive parity heavy mesons on the determination of the
Isgur-Wise functions. The corrections due to these states are competitive with
the contributions arising from K and eta meson loops. Since lattice studies
rely on the chiral behavior of the amplitudes we discuss the chiral limit of
our results. We find that the determination of the slope at zero recoil of the
Isgur-Wise function xi for the B transition to negative parity charm mesons is
moderately affected by the inclusion of new states, while the slope of
tau_{1/2} is affected significantly more.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 13:04:34 GMT"
}
] | 2009-04-17T00:00:00 | [
[
"Eeg",
"Jan O.",
""
],
[
"Fajfer",
"Svjetlana",
""
],
[
"Kamenik",
"Jernej",
""
]
] |
0705.4568 | Teodoro Mu\~noz-Darias | T. Mu\~noz-Darias, I.G. Martinez-Pais, J. Casares, V.S. Dhillon, T.R.
Marsh, R. Cornelisse, D. Steeghs and P.A. Charles | Echoes from the companion star in Sco X-1 | Accepted for publication in MNRAS | Mon.Not.Roy.Astron.Soc.379:1637-1646,2007 | 10.1111/j.1365-2966.2007.12045.x | null | astro-ph | null | We present simultaneous X-ray (RXTE) and optical (ULTRACAM) narrow band
(Bowen blend/HeII and nearby continuum) observations of Sco X-1 at 2-10 Hz time
resolution. We find that the Bowen/HeII emission lags the X-ray light-curves
with a light travel time of ~11-16s which is consistent with reprocessing in
the companion star. The echo from the donor is detected at orbital phase ~0.5
when Sco X-1 is at the top of the Flaring Branch. Evidence of echoes is also
seen at the bottom of the Flaring Branch but with time-lags of 5-10s which are
consistent with reprocessing in an accretion disc with a radial temperature
profile. We discuss the implication of our results for the orbital parameters
of Sco X-1.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:14:01 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Muñoz-Darias",
"T.",
""
],
[
"Martinez-Pais",
"I. G.",
""
],
[
"Casares",
"J.",
""
],
[
"Dhillon",
"V. S.",
""
],
[
"Marsh",
"T. R.",
""
],
[
"Cornelisse",
"R.",
""
],
[
"Steeghs",
"D.",
""
],
[
"Charles",
"P. A.",
""
]
] |
0705.4569 | Michael Olschewsky | Michael Olschewsky | Gauge-Higgs unification with broken flavor symmetry | null | null | null | null | hep-ph | null | We study Gauge-Higgs unification model on the orbifold $S^{1}/Z_{2}$ based on
the extended SM gauge group $G_{SM}^{ex}=SU(2)_{L} \times U(1)_{Y} \times
SO(3)_{F}$. The group $SO(3)_{F}$ is treated as a chiral gauged flavour
symmetry. Electroweak-, flavour- and Higgs interactions are unified in one
single gauge group SU(7) which is broken again down to $G_{SM}^{ex}$ by
orbifolding and imposing additional boundary conditions. The compactification
scale is O(1) TeV. The orbifold $S^{1}/Z_{2}$ is put on a lattice. This setting
gives a staring point for RG-transformations. As a result the bulk is
integrated out and the extra dimension consist of only two points: the orbifold
fixed points. Parallel transporters (PT) in the extra dimension become
nonunitary as a result of the blockspin transformations. In addition, a Higgs
potential emerges naturally. The PTs can be written as a product $e^{A_{y}}
e^{\eta} e^{A_{y}}$ of unitary factors $e^{A_{y}}$ and a selfadjoint factor
$e^{\eta}$. The reduction $48 \to 35 + 6 + \bar{6} + 1$ of the adjoint reps of
SU(7) with respect to $SU(6) \supset G_{SM}^{ex}$ leads to three $SU(2)_{L}$
Higgs doublets: one for each flavour. Their zero modes serve as a substitute
for the SM Higgs. When $G_{SM}^{ex}$ is spontaneously broken down to
$U(1)_{em}$, an exponential gauge boson mass splitting occurs naturally. This
breaking leads to $SO(3)_{F}$ flavour gauge boson masses much above the
compactification scale. Thus tree-level FCNC are naturally suppressed. Making
some simplifying assumptions we also calculate fermion masses and CKM mixing
angles. As for the gauge bosons an exponential fermion mass splitting occurs
naturally. The model predicts a large Higgs sector consisting of 30 Higgs
particles and in its simplest form the weak mixing angle $\theta=0.125$.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:48:52 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Olschewsky",
"Michael",
""
]
] |
0705.4570 | Muktish Acharyya | Muktish Acharyya and Ajanta Bhowal Acharyya | Inflection point as a manifestation of tricritical point on the dynamic
phase boundary in Ising meanfield dynamics | Plain Latex 12 pages. Communications in Computational Physics (2007)
(in press) | Communications in Computational Physics 3 (2008) 397 | null | Presi-col-2007 | cond-mat.stat-mech | null | We studied the dynamical phase transition in kinetic Ising ferromagnet driven
by oscillating magnetic field in meanfield approximation. The meanfield
differential equation was solved by sixth order Runge-Kutta-Felberg method. We
calculated the transition temperature as a function of amplitude and frequency
of the oscillating field. This was plotted against field amplitude taking
frequency as a parameter. As frequency increases the phase boundary is observed
to become inflated. The phase boundary shows an inflection point which
separates the nature of the transition. On the dynamic phase boundary a
tricritical point (TCP) was found, which separates the nature
(continuous/discontinuous) of the dynamic transition across the phase boundary.
The inflection point is identified as the TCP and hence a simpler method of
determining the position of TCP was found. TCP was observed to shift towards
high field for higher frequency. As frequency decreases the dynamic phase
boundary is observe to shrink. In the zero frequency limit this boundary shows
a tendency to merge to the temperature variation of the coercive field.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:50:59 GMT"
},
{
"version": "v2",
"created": "Mon, 9 Jul 2007 08:52:23 GMT"
}
] | 2011-05-02T00:00:00 | [
[
"Acharyya",
"Muktish",
""
],
[
"Acharyya",
"Ajanta Bhowal",
""
]
] |
0705.4571 | Dennis Gaitsgory | Dennis Gaitsgory | Twisted Whittaker model and factorizable sheaves | null | null | null | null | math.RT math.QA | null | Let G be a reductive group. The geometric Satake equivalence realized the
category of representations of the Langlands dual group ^LG in terms of
spherical perverse sheaves (or D-modules) on the affine Grassmannian
Gr_G=G((t))/G[[t]] of the original group G.
In the present paper we perform a first step in realizing the category of
representations of the quantum group corresponding to ^LG in terms of the
geometry of Gr_G.
The idea of the construction belongs to Jacob Lurie.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:57:52 GMT"
},
{
"version": "v2",
"created": "Tue, 5 Feb 2008 18:19:05 GMT"
},
{
"version": "v3",
"created": "Fri, 21 Mar 2008 20:14:52 GMT"
},
{
"version": "v4",
"created": "Thu, 27 Mar 2008 18:50:20 GMT"
}
] | 2008-03-27T00:00:00 | [
[
"Gaitsgory",
"Dennis",
""
]
] |
0705.4572 | Katrin Gelfert | Katrin Gelfert, Christian Wolf | Topological pressure for one-dimensional holomorphic dynamical systems | null | Bull. Polish Acad. Sci. Math. 55 (2007), 53-62 | null | null | math.DS | null | For a class of one-dimensional holomorphic maps f of the Riemann sphere we
prove that for a wide class of potentials h the topological pressure is
entirely determined by the values of h on the repelling periodic points of f.
This is a version of a classical result of Bowen for hyperbolic diffeomorphisms
in the holomorphic non-uniformly hyperbolic setting.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 10:58:58 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Gelfert",
"Katrin",
""
],
[
"Wolf",
"Christian",
""
]
] |
0705.4573 | Par M. Kurlberg | Par Kurlberg | Bounds on exponential sums over small multiplicative subgroups | 15 pages. To appear in Proceedings of CRM-Clay workshop on Additive
Combinatorics, Montreal 2006 | null | null | null | math.NT | null | We show that there is significant cancellation in certain exponential sums
over small multiplicative subgroups of finite fields, giving an exposition of
the arguments by Bourgain and Chang.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:02:49 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Kurlberg",
"Par",
""
]
] |
0705.4574 | Zaza Osmanov | Z. Osmanov, G. Dalakishvili and G. Machabeli | On the reconstruction of a magnetosphere of pulsars nearby the light
cylinder surface | 6 pages, 2 figures | AIPConf.Proc.983:127-129,2008 | 10.1063/1.2900123 | null | astro-ph | null | A mechanism of generation of a toroidal component of large scale magnetic
field, leading to the reconstruction of the pulsar magnetospheres is presented.
In order to understand twisting of magnetic field lines, we investigate
kinematics of a plasma stream rotating in the pulsar magnetosphere. Studying an
exact set of equations describing the behavior of relativistic plasma flows,
the increment of the curvature drift instability is derived, and estimated for
$1s$ pulsars. It is shown that a new parametric mechanism is very efficient and
can explain rotation energy pumping in the pulsar magnetospheres.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:03:00 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Osmanov",
"Z.",
""
],
[
"Dalakishvili",
"G.",
""
],
[
"Machabeli",
"G.",
""
]
] |
0705.4575 | Nikolay Gromov | N.A. Gromov | Higgsless Electroweak Theory following from the Spherical Geometry | 6 pages | J.Phys.Conf.Ser.128:012005,2008 | 10.1088/1742-6596/128/1/012005 | null | hep-th | null | A new formulation of the Electroweak Model with 3-dimensional spherical
geometry in the target space is suggested. The free Lagrangian in the spherical
field space along with the standard gauge field Lagrangian form the full
Higgsless Lagrangian of the model, whose second order terms reproduce the same
fields with the same masses as the Standard Electroweak Model. The vector
bosons and electron masses are generated automatically, so there is no need in
special mechanism.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:10:29 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Gromov",
"N. A.",
""
]
] |
0705.4576 | Viacheslav Egorov | A.G. Beda, V.B. Brudanin, E.V. Demidova, V.G. Egorov, M.G. Gavrilov,
M.V. Shirchenko, A.S. Starostin, Ts. Vylov | The first result of the neutrino magnetic moment measurement in the
GEMMA experiment | 9 pages, 10 figures, 2 tables | Phys.Atom.Nucl.70:1873-1884,2007 | 10.1134/S1063778807110063 | null | hep-ex | null | The first result of the neutrino magnetic moment measurement at the
Kalininskaya Nuclear Power Plant (KNPP) with the GEMMA spectrometer is
presented. An antineutrino-electron scattering is investigated. A high-purity
germanium detector of 1.5 kg placed 13.9 m away from the 3 GW reactor core is
used in the spectrometer. The antineutrino flux is $2.73\times 10^{13} \nu_e /
cm^2 / s$. The differential method is used to extract the $\nu$-e
electromagnetic scattering events. The scattered electron spectra taken in 6200
and 2064 hours for the reactor ON and OFF periods are compared. The upper limit
for the neutrino magnetic moment $\mu_\nu < 5.8\times 10^{-11}$ Bohr magnetons
at 90{%} CL is derived from the data processing.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:21:00 GMT"
}
] | 2009-11-16T00:00:00 | [
[
"Beda",
"A. G.",
""
],
[
"Brudanin",
"V. B.",
""
],
[
"Demidova",
"E. V.",
""
],
[
"Egorov",
"V. G.",
""
],
[
"Gavrilov",
"M. G.",
""
],
[
"Shirchenko",
"M. V.",
""
],
[
"Starostin",
"A. S.",
""
],
[
"Vylov",
"Ts.",
""
]
] |
0705.4577 | Stefan H\"oche | Stefan H\"oche (1), Frank Krauss (1), Thomas Teubner (2) ((1) Durham
University, (2) University of Liverpool) | Multijet events in the k_T-factorisation scheme | null | Eur.Phys.J.C58:17-28,2008 | 10.1140/epjc/s10052-008-0735-y | IPPP/07/20, DCPT/07/40, LTH 744 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Markovian Monte Carlo algorithm for multi-parton production in the
high-energy limit is proposed and the matching with unintegrated parton
densities is discussed.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 17:11:34 GMT"
},
{
"version": "v2",
"created": "Wed, 27 Aug 2008 17:49:16 GMT"
}
] | 2010-03-25T00:00:00 | [
[
"Höche",
"Stefan",
""
],
[
"Krauss",
"Frank",
""
],
[
"Teubner",
"Thomas",
""
]
] |
0705.4578 | Michael Eisermann | Michael Eisermann, Christoph Lamm | Equivalence of symmetric union diagrams | 19 pages, 20 figures; v2 corrected signs in section 3 | J. Knot Theory Ramifications 16 (2007) 879-898 | 10.1142/S0218216507005555 | null | math.GT | null | Motivated by the study of ribbon knots we explore symmetric unions, a
beautiful construction introduced by Kinoshita and Terasaka 50 years ago. It is
easy to see that every symmetric union represents a ribbon knot, but the
converse is still an open problem. Besides existence it is natural to consider
the question of uniqueness. In order to attack this question we extend the
usual Reidemeister moves to a family of moves respecting the symmetry, and
consider the symmetric equivalence thus generated. This notion being in place,
we discuss several situations in which a knot can have essentially distinct
symmetric union representations. We exhibit an infinite family of ribbon
two-bridge knots each of which allows two different symmetric union
representations.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:05:08 GMT"
},
{
"version": "v2",
"created": "Fri, 10 Aug 2007 09:15:19 GMT"
}
] | 2007-09-19T00:00:00 | [
[
"Eisermann",
"Michael",
""
],
[
"Lamm",
"Christoph",
""
]
] |
0705.4579 | Pierre-Henri Chavanis | Pierre-Henri Chavanis | Hamiltonian and Brownian systems with long-range interactions: IV.
General kinetic equations from the quasilinear theory | null | Physica A, 387, 1504 (2008) | 10.1016/j.physa.2007.10.034 | null | cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop the kinetic theory of Hamiltonian systems with weak long-range
interactions. Starting from the Klimontovich equation and using a quasilinear
theory, we obtain a general kinetic equation that can be applied to spatially
inhomogeneous systems and that takes into account memory effects. This equation
is valid at order 1/N in a proper thermodynamic limit and it coincides with the
kinetic equation obtained from the BBGKY hierarchy. For N tending to infinity,
it reduces to the Vlasov equation describing collisionless systems. We describe
the process of phase mixing and violent relaxation leading to the formation of
a quasi stationary state (QSS) on the coarse-grained scale. We interprete the
physical nature of the QSS in relation to Lynden-Bell's statistical theory and
discuss the problem of incomplete relaxation. In the second part of the paper,
we consider the relaxation of a test particle in a thermal bath. We derive a
Fokker-Planck equation by directly calculating the diffusion tensor and the
friction force from the Klimontovich equation. We give general expressions of
these quantities that are valid for possibly spatially inhomogeneous systems
with long correlation time. We show that the diffusion and friction terms have
a very similar structure given by a sort of generalized Kubo formula. We also
obtain non-markovian kinetic equations that can be relevant when the
auto-correlation function of the force decreases slowly with time. An interest
of our approach is to develop a formalism that remains in physical space
(instead of Fourier space) and that can deal with spatially inhomogeneous
systems.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:49:29 GMT"
},
{
"version": "v2",
"created": "Wed, 29 Apr 2009 16:57:46 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Chavanis",
"Pierre-Henri",
""
]
] |
0705.4580 | Yuriy Kuzovlev E. | Yuriy E. Kuzovlev | From shock waves to Brownian motion and 1/f-noise in gas | 8 pages, no figures, RevTex4 | null | null | DonPTI-07-YUK-02 | cond-mat.stat-mech cond-mat.soft | null | A formally exact relation is derived which connects thermodynamically
non-equilibrium evolution of gas density distribution after its arbitrary
strong spatially non-uniform perturbation and evolution of many-particle
correlations between path of some marked particle and its surroundings in
equilibrium gas. This relation directly confirms significance of the
many-particle correlations even under the Boltzmann-Grad limit and thus
validates the earlier suggested revision of kinetics.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:52:08 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Kuzovlev",
"Yuriy E.",
""
]
] |
0705.4581 | Vishnu Jejjala | Vishnu Jejjala, Michael Kavic, Djordje Minic | Fine Structure of Dark Energy and New Physics | 14 pages, LaTeX, typos fixed, comments, references, and footnotes
added, Sec. 4 revised | Adv.HighEnergyPhys.2007:21586,2007 | 10.1155/2007/21586 | DCPT-07/23, VPI-IPNAS-07-04 | hep-th | null | Following our recent work on the cosmological constant problem, in this
letter we make a specific proposal regarding the fine structure (i.e., the
spectrum) of dark energy. The proposal is motivated by a deep analogy between
the blackbody radiation problem, which led to the development of quantum
theory, and the cosmological constant problem, which we have recently argued
calls for a conceptual extension of the quantum theory. We argue that the fine
structure of dark energy is governed by a Wien distribution, indicating its
dual quantum and classical nature. We discuss a few observational consequences
of such a picture of dark energy.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 15:27:58 GMT"
},
{
"version": "v2",
"created": "Mon, 11 Jun 2007 21:47:58 GMT"
},
{
"version": "v3",
"created": "Wed, 5 Sep 2007 12:07:13 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Jejjala",
"Vishnu",
""
],
[
"Kavic",
"Michael",
""
],
[
"Minic",
"Djordje",
""
]
] |
0705.4582 | Rajendra Bhandari | Rajendra Bhandari | Light propagation through a coiled optical fiber and Pancharatnam phase | 16 pages, 3 figures, to appear in J.Opt.Soc.Am. B | J. Opt. Soc. Am. B 24, 2343-2348 (2007) | 10.1364/JOSAB.24.002343 | null | physics.optics physics.gen-ph | null | The nature of changes in the interference pattern caused by the presence of
polarization-changing elements in one or both beams of an interferometer, in
particular those caused by an effective optical activity due to passage of a
polarized beam through a coiled optical fiber are clarified. It is pointed out
that for an incident state that is not circularly polarized so that the two
interfering beams go to different polarization states, there is an observable
nonzero Pancharatnam phase shift between them which depends on the incident
polarization state and on the solid angle subtended by the track of the
$\vec{k}$-vector at the centre of the sphere of k-vectors. The behaviour of
this phase shift is singular when the two interfering states are nearly
orthogonal. It is shown that for zero path difference between the two beams,
the amplitude of intensity modulation as a function of optical activity is
independent of the incident polarization state.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:53:48 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Bhandari",
"Rajendra",
""
]
] |
0705.4583 | Joerg Jaeckel | Joerg Jaeckel | Photons as a Probe of Minicharged Particles | 7 pages, 5 figures. Proceedings for the ``Rencontres de Moriond:
Electroweak Interactions and Unified Theories'' (2007) | null | null | IPPP 07/24; DCPT 07/48 | hep-ph | null | Low energy experiments with photons can provide deep insights into
fundamental physics. In this note we concentrate on minicharged particles. We
discuss how they can arise in extensions of the standard model and how we can
search for them using a variety of laboratory experiments.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 11:59:42 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Jaeckel",
"Joerg",
""
]
] |
0705.4584 | Stefan Johansson | Magnus Boman and Stefan J. Johansson | Modeling Epidemic Spread in Synthetic Populations - Virtual Plagues in
Massively Multiplayer Online Games | Accepted for presentation at Digital Games Research Association
(DiGRA) conference in Tokyo in September 2007. All comments to the authors
(mail addresses are in the paper) are welcome | null | null | null | cs.CY cs.AI cs.MA | null | A virtual plague is a process in which a behavior-affecting property spreads
among characters in a Massively Multiplayer Online Game (MMOG). The MMOG
individuals constitute a synthetic population, and the game can be seen as a
form of interactive executable model for studying disease spread, albeit of a
very special kind. To a game developer maintaining an MMOG, recognizing,
monitoring, and ultimately controlling a virtual plague is important,
regardless of how it was initiated. The prospect of using tools, methods and
theory from the field of epidemiology to do this seems natural and appealing.
We will address the feasibility of such a prospect, first by considering some
basic measures used in epidemiology, then by pointing out the differences
between real world epidemics and virtual plagues. We also suggest directions
for MMOG developer control through epidemiological modeling. Our aim is
understanding the properties of virtual plagues, rather than trying to
eliminate them or mitigate their effects, as would be in the case of real
infectious disease.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:15:05 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Boman",
"Magnus",
""
],
[
"Johansson",
"Stefan J.",
""
]
] |
0705.4585 | Lars Samuelsson | Lars Samuelsson, Nils Andersson, Asimina Maniopoulou | A characteristic approach to the quasi-normal mode problem | 14 pages, 3 figures, 3 tables. v2: Minor revisions, matches published
version | Class.Quant.Grav.24:4147-4160,2007 | 10.1088/0264-9381/24/16/010 | null | gr-qc | null | In this paper we discuss a new approach to the quasinormal-mode problem in
general relativity. By combining a characteristic formulation of the
perturbation equations with the integration of a suitable phase-function for a
complex valued radial coordinate, we reformulate the standard outgoing-wave
boundary condition as a zero Dirichlet condition. This has a number of
important advantages over previous strategies. The characteristic formulation
permits coordinate compactification, which means that we can impose the
boundary condition at future null infinity. The phase function avoids
oscillatory behaviour in the solution, and the use of a complex radial variable
allows a clean distinction between out- and ingoing waves. We demonstrate that
the method is easy to implement, and that it leads to high precision numerical
results. Finally, we argue that the method should generalise to the important
problem of rapidly rotating neutron star spacetimes.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:21:03 GMT"
},
{
"version": "v2",
"created": "Mon, 13 Aug 2007 10:57:20 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Samuelsson",
"Lars",
""
],
[
"Andersson",
"Nils",
""
],
[
"Maniopoulou",
"Asimina",
""
]
] |
0705.4586 | Marek Wezgowiec | M. Wezgowiec, M. Urbanik, B. Vollmer, R. Beck, K. T. Chyzy, M. Soida,
Ch. Balkowski | The magnetic fields of large Virgo Cluster spirals | 13 pages, 12 figures | null | 10.1051/0004-6361:20066972 | null | astro-ph | null | Because of its proximity the Virgo Cluster is an excellent target for
studying interactions of galaxies with the cluster environment. Both the
high-velocity tidal interactions and effects of ram pressure stripping by the
intracluster gas can be investigated. Optical and/or \ion{H}{i} observations do
not always show effects of weak interactions between galaxies and their
encounters with the cluster medium. For this reason we searched for possible
anomalies in the magnetic field structure in Virgo Cluster spirals which could
be attributed to perturbations in their gas distribution and kinematics. Five
angularly large Virgo Cluster spiral galaxies (NGC 4501, NGC 4438, NGC 4535,
NGC 4548 and NGC 4654) were the targets for a sensitive total power and
polarization study using the 100-m radio telescope in Effelsberg at 4.85 GHz.
For two objects polarization data at higher frequencies have been obtained
allowing Faraday rotation analysis. Distorted magnetic field structures were
identified in all galaxies. Interaction-induced magnetized outflows were found
in NGC 4438 (due to nuclear activity) and NGC 4654 (a combination of tidal
tails and ram pressure effects). Almost all objects (except the anaemic NGC
4548) exhibit distortions in polarized radio continuum attributable to
influence of the ambient gas. For some galaxies they agree with observations of
other species, but sometimes (NGC 4535) the magnetic field is the only tracer
of the interaction with the cluster environment. The cluster environment
clearly affects the evolution of the galaxies due to ram pressure and tidal
effects. Magnetic fields provide a very long-lasting memory of past
interactions. Therefore, they are a good tracer of weak interactions which are
difficult to detect by other observations.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:23:11 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Wezgowiec",
"M.",
""
],
[
"Urbanik",
"M.",
""
],
[
"Vollmer",
"B.",
""
],
[
"Beck",
"R.",
""
],
[
"Chyzy",
"K. T.",
""
],
[
"Soida",
"M.",
""
],
[
"Balkowski",
"Ch.",
""
]
] |
0705.4587 | Yves Fremat | Yves Fremat (ROB), P. Lampens (ROB), P. Van Cauteren (BHO), S. Kleidis
(ZO), K. Gazeas (DAAMP), P. Niarchos (DAAMP), C. Neiner (GEPI), D. Dimitrov
(IA), J. Cuypers (ROB), J. Montalban (IALG), P. De Cat (ROB), C.W. Robertson
(SETEC) | Search for pulsation among suspected A-type binaries and the new
multiperiodic Delta Scuti star HD217860 | 16 pages, 12 Postscript figures, 1 long table. Table 2 is only
available in electronic form. Journal-ref: Astronomy and Astrophysics, in
press (2007) | null | 10.1051/0004-6361:20065574 | null | astro-ph | null | We have explored a sample of suspected A-type binaries in a systematic way,
both spectroscopically and photometrically. Due to their location in the H-R
diagram, indications of pulsation and/or chemical peculiarities among these
suspected binary (or multiple) systems may be found. High-resolution
spectroscopy obtained with the ELODIE and MUSICOS spectrographs was used in
combination with a few nights of differential CCD photometry in order to search
for pulsation(s). Of the 32 investigated targets, eight are spectroscopic
binaries, one of which is a close binary also showing eclipses, and three have
been identified as Delta Scuti pulsators with rapid line-profile variations.
Among the latter stars, HD 217860 reveals interesting multiperiodic photometric
and spectroscopic variations, with up to eight frequencies common to two large
photometric data sets. We suggest that at least one radial overtone mode is
excited among the two most dominant frequencies. We furthermore found evidence
for a strong modulation of the amplitude(s) and/or the (radial) frequency
content of this intriguing Delta Scuti star.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:25:08 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Fremat",
"Yves",
"",
"ROB"
],
[
"Lampens",
"P.",
"",
"ROB"
],
[
"Van Cauteren",
"P.",
"",
"BHO"
],
[
"Kleidis",
"S.",
"",
"ZO"
],
[
"Gazeas",
"K.",
"",
"DAAMP"
],
[
"Niarchos",
"P.",
"",
"DAAMP"
],
[
"Neiner",
"C.",
"",
"GEPI"
],
[
"Dimitrov",
"D.",
"",
"IA"
],
[
"Cuypers",
"J.",
"",
"ROB"
],
[
"Montalban",
"J.",
"",
"IALG"
],
[
"De Cat",
"P.",
"",
"ROB"
],
[
"Robertson",
"C. W.",
"",
"SETEC"
]
] |
0705.4588 | Shurong Zheng | Shurong Zheng, Guodong Song, Ning-Zhong Shi | Variable Selection Incorporating Prior Constraint Information into Lasso | 15 pages | null | null | null | stat.ME | null | We propose the variable selection procedure incorporating prior constraint
information into lasso. The proposed procedure combines the sample and prior
information, and selects significant variables for responses in a narrower
region where the true parameters lie. It increases the efficiency to choose the
true model correctly. The proposed procedure can be executed by many
constrained quadratic programming methods and the initial estimator can be
found by least square or Monte Carlo method. The proposed procedure also enjoys
good theoretical properties. Moreover, the proposed procedure is not only used
for linear models but also can be used for generalized linear models({\sl
GLM}), Cox models, quantile regression models and many others with the help of
Wang and Leng (2007)'s LSA, which changes these models as the approximation of
linear models. The idea of combining sample and prior constraint information
can be also used for other modified lasso procedures. Some examples are used
for illustration of the idea of incorporating prior constraint information in
variable selection procedures.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:25:47 GMT"
}
] | 2011-02-19T00:00:00 | [
[
"Zheng",
"Shurong",
""
],
[
"Song",
"Guodong",
""
],
[
"Shi",
"Ning-Zhong",
""
]
] |
0705.4589 | Tobias Lamm | Tobias Lamm | Energy identity for approximations of harmonic maps from surfaces | 21 pages, statement of Theorem 1.1 corrected, to appear in Trans.
Amer. Math. Soc | null | null | null | math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the energy identity for min-max sequences of the Sacks-Uhlenbeck and
the biharmonic approximation of harmonic maps from surfaces into general target
manifolds. The proof relies on Hopf-differential type estimates for the two
approximations and on estimates for the concentration radius of bubbles.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:28:46 GMT"
},
{
"version": "v2",
"created": "Thu, 11 Sep 2008 18:33:16 GMT"
}
] | 2008-09-11T00:00:00 | [
[
"Lamm",
"Tobias",
""
]
] |
0705.4590 | Juana Sendra | J. Rafael Sendra, Juana Sendra | An Algebraic Analysis of Conchoids to Algebraic Curves | 8 figures | Applicable Algebra in Engineering, Communication and Computing
vol. 19, pp. 413-428 (2008) | null | null | math.AG | null | We study conchoids to algebraic curve from the perspective of algebraic
geometry, analyzing their main algebraic properties. We introduce the formal
definition of conchoid of an algebraic curve by means of incidence diagrams. We
prove that, with the exception of a circle centered at the focus and taking $d$
as its radius, the conchoid is an algebraic curve having at most two
irreducible components. In addition, we introduce the notions of special and
simple components of a conchoid. Moreover we state that, with the exception of
lines passing through the focus, the conchoid always has at least one simple
component and that, for almost every distance, all the components of the
conchoid are simple. We state that, in the reducible case, simple conchoid
components are birationally equivalent to the initial curve, and we show how
special components can be used to decide whether a given algebraic curve is the
conchoid of another curve.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:40:32 GMT"
}
] | 2014-01-08T00:00:00 | [
[
"Sendra",
"J. Rafael",
""
],
[
"Sendra",
"Juana",
""
]
] |
0705.4591 | Kazumi Suematsu | Kazumi Suematsu | Theory of Gel Formation | 11 pages, 4 figures, 2 Tables | null | null | null | cond-mat.soft | null | A theory of drop-wise addition polymerization is developed. Because of the
linear growth of the reaction volume V, the system gives rise to a new type of
distribution function for cyclic species that can be expressed by the sum of
two terms: the conventional distribution term and a extra term due to the
dilution effect. The present result is an extension of the conventional
homogeneous polymerization that corresponds to a special case without the extra
term. Making use of the result we derive the gel point formula for this unique
polymerization. The theoretical result is compared with the recent
observations.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:40:37 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Suematsu",
"Kazumi",
""
]
] |
0705.4592 | Victor S. L'vov | Victor S. L'vov, Itamar Procaccia and Oleksii Rudenko (Department of
Chemical Physics, The Weizmann Institute of Science, Rehovot, Israel) | Universal Model of Finite-Reynolds Number Turbulent Flow in Channels and
Pipes | 4 pages, 6 figs, re-submitted PRL according to referees comments | Physical Review Letters 100, 054504 (2008) | 10.1103/PhysRevLett.100.054504 | null | nlin.CD physics.flu-dyn | null | In this Letter we suggest a simple and physically transparent analytical
model of the pressure driven turbulent wall-bounded flows at high but finite
Reynolds numbers Re. The model gives accurate qualitative description of the
profiles of the mean-velocity and Reynolds-stresses (second order correlations
of velocity fluctuations) throughout the entire channel or pipe in the wide
range of Re, using only three Re-independent parameters. The model sheds light
on the long-standing controversy between supporters of the century-old log-law
theory of von-K\`arm\`an and Prandtl and proposers of a newer theory promoting
power laws to describe the intermediate region of the mean velocity profile.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:41:16 GMT"
},
{
"version": "v2",
"created": "Sun, 2 Sep 2007 08:36:38 GMT"
},
{
"version": "v3",
"created": "Fri, 7 Dec 2007 14:55:30 GMT"
}
] | 2009-02-18T00:00:00 | [
[
"L'vov",
"Victor S.",
"",
"Department of\n Chemical Physics, The Weizmann Institute of Science, Rehovot, Israel"
],
[
"Procaccia",
"Itamar",
"",
"Department of\n Chemical Physics, The Weizmann Institute of Science, Rehovot, Israel"
],
[
"Rudenko",
"Oleksii",
"",
"Department of\n Chemical Physics, The Weizmann Institute of Science, Rehovot, Israel"
]
] |
0705.4593 | Anthony Csizmazia | Anthony Csizmazia | On the Riemann zeta-function, Parts IV-V | 12 pages Added Part V to a contracted version of Part IV | null | null | null | math.GM | null | In Part I an odd meromorphic function f(s) has been constructed from the
Riemann zeta-function evaluated at one-half plus s. The conjunction of the
Riemann hypothesis and hypotheses advanced by the author in Part I is assumed.
In Part IV we derive the two-sided Laplace transform representation of f(s) on
the open vertical strip V of all s with real part between zero and four. An
additional hypothesis is used to prove that the Laplace density of f(s) on the
strip V is positive. Let z(n) be the nth critical zero of the Riemann
zeta-function of positive imaginary part in order of magnitude thereof. In Part
V an expression is derived for z(1). A relation is obtained of the pair z(n)
and the first derivative thereat of the zeta-function to the preceding such
pairs.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:44:53 GMT"
},
{
"version": "v2",
"created": "Thu, 12 Jul 2007 12:53:11 GMT"
}
] | 2007-07-12T00:00:00 | [
[
"Csizmazia",
"Anthony",
""
]
] |
0705.4594 | Michal Bejger | P. Haensel, M. Bejger, J.L. Zdunik | Two branches of neutron stars - reconciling a 2M_sun pulsar and SN1987A | 4 pages, 5 figures, submitted to A&A Letters | null | null | null | astro-ph | null | The analysis of SN1987A led Brown and Bethe (1995) to conclusion, that the
maximum mass of cold neutron stars is low, M_max ~ 1.5M_sun. Such a low M_max,
due to a kaon condensation in the stellar core, implies collapse of a too
massive deleptonized protoneutron star into a black hole. This would naturally
explain the lack of a neutron star in the SN1987A remnant. On the other hand,
recent evaluation of mass of PSR J0751+1807 gives M_max > 2M_sun. This
contradicts the original Bethe-Brown model, but can be reconciled within
scenarios proposed in the present Letter. We consider two types of dense matter
models with high-density softening, due to a transition from a non-strange
N-phase of matter to a strangeness carrying phase S: kaon condensation and
deconfinement of quarks. Two scenarios of neutron star formation in stellar
core collapse are considered. In the first scenario, realized in sufficiently
hot and dense supernova cores, nucleation of an S-phase is sufficiently rapid
so as to form an S-phase core, and implying M_max = M^S_max =~ 1.5M_sun. In the
second scenario, nucleation of the S-phase at neutron star birth is too slow to
materialize, and the star becomes cold without forming an S-phase core. Then,
stellar mass can increase via accretion, until central density \rho_crit is
reached, and the S phase forms. This N branch of neutron stars ends at
M=M_crit. We select several models of N-phase satifying the necessary condition
M^N_max > 2M_sun and combine them with models of kaon condensation and quark
deconfinement. For kaon condensation, we get M_crit =~ M^S_max =~ 1.5M_sun,
which is ruled out by PSR J0751+1807. On the contrary, for the EOSs with quark
deconfinement we get M_crit =~ M^N_max > 2M_sun, which reconciles SN1987A and
PSR J0751+1807.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 13:12:44 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Haensel",
"P.",
""
],
[
"Bejger",
"M.",
""
],
[
"Zdunik",
"J. L.",
""
]
] |
0705.4595 | Hidehiro Yonezawa | Hidehiro Yonezawa, Samuel L. Braunstein and Akira Furusawa | Experimental demonstration of quantum teleportation of broadband
squeezing | null | Phys. Rev. Lett. 99, 110503 (2007) | 10.1103/PhysRevLett.99.110503 | null | quant-ph | null | We demonstrate an unconditional high-fidelity teleporter capable of
preserving the broadband entanglement in an optical squeezed state. In
particular, we teleport a squeezed state of light and observe $-0.8 \pm 0.2$dB
of squeezing in the teleported (output) state. We show that the squeezing
criterion translates directly into a sufficient criterion for entanglement of
the upper and lower sidebands of the optical field. Thus, this result
demonstrates the first unconditional teleportation of broadband entanglement.
Our teleporter achieves sufficiently high fidelity to allow the teleportation
to be cascaded, enabling, in principle, the construction of deterministic
non-Gaussian operations.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 14:43:52 GMT"
},
{
"version": "v2",
"created": "Wed, 2 Apr 2008 11:27:29 GMT"
},
{
"version": "v3",
"created": "Mon, 7 Apr 2008 04:20:27 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Yonezawa",
"Hidehiro",
""
],
[
"Braunstein",
"Samuel L.",
""
],
[
"Furusawa",
"Akira",
""
]
] |
0705.4596 | Francesca Ianni | F. Ianni, R. Di Leonardo, S. Gentilini and G. Ruocco | Shear banding phenomena in a Laponite suspension | 5 pages, 3 figures | null | null | null | physics.flu-dyn | null | Shear localization in an aqueous clay suspension of Laponite is investigated
through dynamic light scattering, which provides access both to the dynamics of
the system (homodyne mode) and to the local velocity profile (heterodyne mode).
When the shear bands form, a relaxation of the dynamics typical of a gel phase
is observed in the unsheared band soon after flow stop, suggesting that an
arrested dynamics is present during the shear localization regime. Periodic
oscillations of the flow behavior, typical of a stick-slip phenomenon, are also
observed when shear localization occurs. Both results are discussed in the
light of various theoretical models for soft glassy materials.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:53:38 GMT"
}
] | 2007-06-01T00:00:00 | [
[
"Ianni",
"F.",
""
],
[
"Di Leonardo",
"R.",
""
],
[
"Gentilini",
"S.",
""
],
[
"Ruocco",
"G.",
""
]
] |
0705.4597 | James Urquhart | J. S. Urquhart, A. L. Busfield, M. G. Hoare, S. L. Lumsden, R. D.
Oudmaijer, T. J. T. Moore, A. G. Gibb, C. R. Purcell, M. G. Burton and L. J.
L. Marechal | The RMS Survey: 13CO observations of candidate massive YSOs in the
southern hemisphere | Summitted to A&A, the resolution of figure 1 has been reduced,
samples of Table 3 and Figure 11 are now included but the full version will
only be available in the online version of the journal | null | 10.1017/S1743921307002700 | null | astro-ph | null | Abridged: The Red MSX Source (RMS) survey is an ongoing multi-wavelength
observational programme designed to return a large, well-selected sample of
massive young stellar objects (MYSOs). Here we present 13CO observations made
towards 854 MYSOs candidates located in the 3rd and 4th quadrants. We detected
13CO emission towards a total of 751 of the 854 RMS sources observed (~88%). In
total 2185 emission components are detected above 3$\sigma$ level. Multiple
emission profiles are observed towards the majority of these sources - 455
sources (~60%) - with an average of ~4 molecular clouds along the line of
sight. These multiple emission features make it difficult to assign a kinematic
velocity to many of our sample. We have used archival CS (J=2-1) and maser
velocities to resolved the component multiplicity towards 82 sources and have
derived a criterion which is used to identify the most likely component for a
further 202 multiple component sources. Combined with the single component
detections we have obtained unambiguous kinematic velocities towards 580
sources (~80% of the detections). The 171 sources for which we have not been
able to determine the kinematic velocity will require additional line data.
Using the rotation curve of Brand and Blitz (1993) and their radial velocities
we calculate kinematic distances for all components detected.
| [
{
"version": "v1",
"created": "Thu, 31 May 2007 12:57:45 GMT"
},
{
"version": "v2",
"created": "Wed, 6 Jun 2007 12:54:45 GMT"
},
{
"version": "v3",
"created": "Sun, 10 Jun 2007 14:10:20 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Urquhart",
"J. S.",
""
],
[
"Busfield",
"A. L.",
""
],
[
"Hoare",
"M. G.",
""
],
[
"Lumsden",
"S. L.",
""
],
[
"Oudmaijer",
"R. D.",
""
],
[
"Moore",
"T. J. T.",
""
],
[
"Gibb",
"A. G.",
""
],
[
"Purcell",
"C. R.",
""
],
[
"Burton",
"M. G.",
""
],
[
"Marechal",
"L. J. L.",
""
]
] |
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