id
stringlengths 9
16
| submitter
stringlengths 1
64
⌀ | authors
stringlengths 3
36.7k
| title
stringlengths 1
382
| comments
stringlengths 1
1.15k
⌀ | journal-ref
stringlengths 1
557
⌀ | doi
stringlengths 7
153
⌀ | report-no
stringlengths 1
479
⌀ | categories
stringlengths 5
125
| license
stringclasses 9
values | abstract
stringlengths 6
6.09k
| versions
list | update_date
timestamp[s] | authors_parsed
sequence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0705.1798 | Andrei Gritsan | The BABAR Collaboration, B. Aubert, et al | Amplitude Analysis of the B+- ->phi K*(892)+- Decay | 7 pages, 8 postscript figures, submitted to Phys. Rev. Lett | Phys.Rev.Lett.99:201802,2007 | 10.1103/PhysRevLett.99.201802 | BABAR-CONF-07/026, SLAC-PUB-12462 | hep-ex | null | We perform an amplitude analysis of B+- -> phi(1020) K*(892)+- decay with a
sample of about 384 million BBbar pairs recorded with the BABAR detector.
Overall, twelve parameters are measured, including the fractions of
longitudinal f_L and parity-odd transverse f_perp amplitudes, branching
fraction, strong phases, and six parameters sensitive to CP-violation. We use
the dependence on the Kpi invariant mass of the interference between the JP=1-
and 0+ Kpi components to resolve the discrete ambiguity in the determination of
the strong and weak phases. Our measurements of f_L=0.49+-0.05+-0.03,
f_perp=0.21+-0.05+-0.02, and the strong phases point to the presence of a
substantial helicity-plus amplitude from a presently unknown source.
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 20:46:31 GMT"
}
] | 2010-04-08T00:00:00 | [
[
"The BABAR Collaboration",
"",
""
],
[
"Aubert",
"B.",
""
]
] |
0705.1799 | Florentin Smarandache | Florentin Smarandache | Subjective Questions and Answers for a Mathematics Instructor of Higher
Education | 15 pages | In the book "Collected Papers", by F. Smarandache, Vol. II, pp.
32-48, Moldova State University Press at Kishinev, 1997 | null | null | math.GM | null | This article of mathematical education reflects author's experience with job
applications and teaching methods and procedures to employ in the American
Higher Education. It is organized as a standard questionnaire.
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 20:52:01 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Smarandache",
"Florentin",
""
]
] |
0705.1800 | Vivek Dhawan | V. Dhawan, I. F. Mirabel, M. Ribo, I. Rodrigues | Kinematics of Black Hole X-ray Binary GRS 1915+105 | 16 pages, 4 figures. ApJ accepted | null | 10.1086/520111 | null | astro-ph | null | The space velocity of a stellar black hole encodes the history of its
formation and evolution. Here we measure the 3-dimensional motion of the
microquasar GRS 1915+105, using a decade of astrometry with the NRAO Very Long
Baseline Array, together with the published radial velocity. The velocity in
the Galactic Plane deviates from circular rotation by 53-80 +_ 8 km/s, where
the range covers any specific distance from 6-12 kpc. Perpendicular to the
plane, the velocity is only 10 +_ 4 km/s. The peculiar velocity is minimized at
a distance 9-10 kpc, and is then nearly in the radial direction towards the
Galactic Center. We discuss mechanisms for the origin of the peculiar velocity,
and conclude that it is most likely a consequence of Galactic velocity
diffusion on this old binary, rather than the result of a supernova kick during
the formation of the 14 Mo black hole. Finally, a brief comparison is made with
4 other BH binaries whose kinematics are well determined.
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 20:58:38 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Dhawan",
"V.",
""
],
[
"Mirabel",
"I. F.",
""
],
[
"Ribo",
"M.",
""
],
[
"Rodrigues",
"I.",
""
]
] |
0705.1801 | Fabian Heidrich-Meisner | F. Heidrich-Meisner, G.B. Martins, C.A. Busser, K.A. Al-Hassanieh,
A.E. Feiguin, G. Chiappe, E.V. Anda, E. Dagotto | Transport through quantum dots: A combined DMRG and cluster-embedding
study | 16 pages, 14 figures, revised version to appear in Eur. Phys. J. B,
additional references | Eur. Phys. J. B 67, 527 (2009) | 10.1140/epjb/e2009-00036-4 | null | cond-mat.str-el | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The numerical analysis of strongly interacting nanostructures requires
powerful techniques. Recently developed methods, such as the time-dependent
density matrix renormalization group (tDMRG) approach or the embedded-cluster
approximation (ECA), rely on the numerical solution of clusters of finite size.
For the interpretation of numerical results, it is therefore crucial to
understand finite-size effects in detail. In this work, we present a careful
finite-size analysis for the examples of one quantum dot, as well as three
serially connected quantum dots. Depending on odd-even effects, physically
quite different results may emerge from clusters that do not differ much in
their size. We provide a solution to a recent controversy over results obtained
with ECA for three quantum dots. In particular, using the optimum clusters
discussed in this paper, the parameter range in which ECA can reliably be
applied is increased, as we show for the case of three quantum dots. As a
practical procedure, we propose that a comparison of results for static
quantities against those of quasi-exact methods, such as the ground-state
density matrix renormalization group (DMRG) method or exact diagonalization,
serves to identify the optimum cluster type. In the examples studied here, we
find that to observe signatures of the Kondo effect in finite systems, the best
clusters involving dots and leads must have a total z-component of the spin
equal to zero.
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 21:20:55 GMT"
},
{
"version": "v2",
"created": "Sat, 17 May 2008 14:50:48 GMT"
},
{
"version": "v3",
"created": "Tue, 18 Nov 2008 17:21:48 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Heidrich-Meisner",
"F.",
""
],
[
"Martins",
"G. B.",
""
],
[
"Busser",
"C. A.",
""
],
[
"Al-Hassanieh",
"K. A.",
""
],
[
"Feiguin",
"A. E.",
""
],
[
"Chiappe",
"G.",
""
],
[
"Anda",
"E. V.",
""
],
[
"Dagotto",
"E.",
""
]
] |
0705.1802 | Ofir Alon | Lorenz S. Cederbaum, Alexej I. Streltsov, and Ofir E. Alon | On-top fragmentation stabilizes atom-rich attractive Bose-Einstein
condensates | 12 pages, 4 figures | Phys. Rev. Lett. 100, 040402 (2008); [published with modified
title] | 10.1103/PhysRevLett.100.040402 | null | cond-mat.other | null | It is well known that attractive condensates do not posses a stable ground
state in three dimensions. The widely used Gross-Pitaevskii theory predicts the
existence of metastable states up to some critical number
$N_{\mathrm{cr}}^{\mathrm{GP}}$ of atoms. It is demonstrated here that
fragmented metastable states exist for atom numbers well above
$N_{\mathrm{cr}}^{\mathrm{GP}}$. The fragments are strongly overlapping in
space. The results are obtained and analyzed analytically as well as
numerically. The implications are discussed.
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 21:11:30 GMT"
}
] | 2009-11-27T00:00:00 | [
[
"Cederbaum",
"Lorenz S.",
""
],
[
"Streltsov",
"Alexej I.",
""
],
[
"Alon",
"Ofir E.",
""
]
] |
0705.1803 | Asterios Pantokratoras | Asterios Pantokratoras | Comment on six papers published by M.A. El-Hakiem and his co-workers in
International Communications in Heat and Mass Transfer, Journal of Magnetism
and Magnetic Materials and Heat and Mass Transfer | Comment on six papers published by M.A. El-Hakiem and his co-workers
in International Communications in Heat and Mass Transfer, Journal of
Magnetism and Magnetic Materials and Heat and Mass Transfer | null | null | null | physics.flu-dyn | null | Comment on six papers published by M.A. El-Hakiem and his co-workers in
International Communications in Heat and Mass Transfer, Journal of Magnetism
and Magnetic Materials and Heat and Mass Transfer
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 21:39:47 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Pantokratoras",
"Asterios",
""
]
] |
0705.1804 | Reinhard Kremer | M. Cardona, R. K. Kremer, R. Lauck, G. Siegle, J.Serrano, A.H. Romero | Heat Capacity of PbS: Isotope Effects | 17 pages including 10 Figs | null | 10.1103/PhysRevB.76.075211 | null | cond-mat.mtrl-sci | null | In recent years, the availability of highly pure stable isotopes has made
possible the investigation of the dependence of the physical properties of
crystals, in particular semiconductors, on their isotopic composition.
Following the investigation of the specific heat ($C_p$, $C_v$) of monatomic
crystals such as diamond, silicon, and germanium, similar investigations have
been undertaken for the tetrahedral diatomic systems ZnO and GaN (wurtzite
structure), for which the effect of the mass of the cation differs from that of
the anion. In this article we present measurements for a semiconductor with
rock salt structure, namely lead sulfide. Because of the large difference in
the atomic mass of both constituents ($M_{\rm Pb}$= 207.21 and ($M_{\rm
S}$=32.06 a.m.u., for the natural isotopic abundance) the effects of varying
the cation and that of the anion mass are very different for this canonical
semiconductor. We compare the measured temperature dependence of $C_p \approx
C_v$, and the corresponding derivatives with respect to ($M_{\rm Pb}$ and
$M_{\rm S}$), with \textit{\textit{ab initio}} calculations based on the
lattice dynamics obtained from the local density approximation (LDA) electronic
band structure. Quantitative deviations between theory and experiment are
attributed to the absence of spin-orbit interaction in the ABINIT program used
for the electronic band structure calculations.
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 21:39:47 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Cardona",
"M.",
""
],
[
"Kremer",
"R. K.",
""
],
[
"Lauck",
"R.",
""
],
[
"Siegle",
"G.",
""
],
[
"Serrano",
"J.",
""
],
[
"Romero",
"A. H.",
""
]
] |
0705.1805 | Daniele Fargion | D. Fargion | Asteroid Deflection: How, where and when? | 14 pages, 5 figures; editorial corrections and answer to referee open
questions on project time scale | ChinChin. J. Astron. Astrophys. Vol. 8 (2008), Suppl | null | null | astro-ph physics.space-ph | null | To deflect impact-trajectory of massive km^3 and spinning asteroid by a few
terrestrial radius one need a large momentum exchange. The dragging of huge
spinning bodies in space by external engine seems difficult or impossible. Our
solution is based on the landing of multi screw-rockets, powered by
mini-nuclear engines, on the body, that dig a small fraction of the soil
surface, to use as an exhaust propeller, ejecting it vertically in phase among
themselves. Such a mass ejection increases the momentum exchange, their number
redundancy guarantees the stability of the system. The slow landing (below 40
cm s^-1) of each engine-unity at those lowest gravity field, may be achieved by
save rolling and bouncing along the surface. The engine array tuned activity,
overcomes the asteroid angular velocity. Coherent turning of the jet heads
increases the deflection efficiency. A procession along its surface may
compensate at best the asteroid spin. A small skin-mass (about 2 10^4 tons) may
be ejected by mini nuclear engines. Such prototypes may also build first save
galleries for humans on the Moon. Conclusive deflecting tests might be
performed on remote asteroids. The incoming asteroid 99942 Apophis (just 2% of
km^3) may be deflected safely a few Earth radius. How to tag its trajectory is
described. Its encounter maybe not just a hazard but an opportunity, learning
how to land, dig, build and also to nest save human station inside. Asteroids
amplified deflections by gravity swing maybe driven into longest planetary
journeys. Mars journey may benefict by Phobos natural asteroid parking and
fueling role.
| [
{
"version": "v1",
"created": "Sat, 12 May 2007 23:50:03 GMT"
},
{
"version": "v2",
"created": "Fri, 27 Jul 2007 11:39:36 GMT"
},
{
"version": "v3",
"created": "Mon, 3 Sep 2007 22:06:50 GMT"
},
{
"version": "v4",
"created": "Sun, 4 Nov 2007 20:42:18 GMT"
}
] | 2008-03-11T00:00:00 | [
[
"Fargion",
"D.",
""
]
] |
0705.1806 | Va\v{s}ek Chv\'atal | Victor Campos, Vasek Chvatal, Luc Devroye, Perouz Taslakian | Transversals in trees | null | Journal of Graph Theory 73 (2013), 32 -- 43 | null | null | math.CO | null | A transversal in a rooted tree is any set of nodes that meets every path from
the root to a leaf. We let c(T,k) denote the number of transversals of size k
in a rooted tree T. We define a partial order on the set of all rooted trees
with n nodes by saying that a tree T succeeds a tree T' if c(T,k) is at least
c(T',k) for all k and strictly greater than c(T',k) for at least one k. We
prove that, for every choice of positive integers d and n, the set of all
rooted trees on n nodes where each node has at most d children has a unique
minimal element with respect to this partial order and we describe this tree.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 01:10:38 GMT"
}
] | 2013-08-20T00:00:00 | [
[
"Campos",
"Victor",
""
],
[
"Chvatal",
"Vasek",
""
],
[
"Devroye",
"Luc",
""
],
[
"Taslakian",
"Perouz",
""
]
] |
0705.1807 | Maria de Sousa Vieira | Maria de Sousa Vieira | Properties of Zero-Lag Long-Range Synchronization via Dynamical Relaying | 5 pages, 4 figures | null | null | null | cond-mat.stat-mech | null | In a recent letter, Fisher et al. reported the phenomenon of zero-lag long
range isochronous synchronization via dynamical relaying in systems with delay
[Phys. Rev. Lett. bf 97, 123902 (2006)]. They reported that when one has two
coupled systems A and C, with delay between them, then the introduction of a
third element B between A and C will allow them to synchronize even in regions
of the parameter space where this was not possible without the presence of B.
Here we study in detail the phenomenon and verify that in all the cases studied
(including the ones reported by Fisher et al.) this occurs due to the tendency
of A and B and B and C to be in antiphase synchronization and if A is in
antiphase with B and B is in antiphase with C, it will imply that A and C are
inphase. We show this in coupled quadratic maps, Kuramoto and R\"ossler
oscillators. We also report that there is a simpler configuration where the
same phenomenon occurs and has nearly the same features of the cases studied by
Fisher et al.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 21:40:49 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Vieira",
"Maria de Sousa",
""
]
] |
0705.1808 | Louiza Fouli | Louiza Fouli (University of Texas, Austin) | Computing the core of ideals in arbitrary characteristic | 13 pages, revised. To appear in the Journal of Algebra | null | null | null | math.AC | null | Let $R$ be a local Gorenstein ring with infinite residue field of arbitrary
characteristic. Let $I$ be an $R$--ideal with $g=\height I >0$, analytic spread
$\ell$, and let $J$ be a minimal reduction of $I$. We further assume that $I$
satisfies $G_{\ell}$ and ${\depth}
R/I^j \geq \dim R/I -j+1$ for $1 \leq j \leq \ell-g$. The question we are
interested in is whether $\core{I}=J^{n+1}:\ds \sum_{b \in I} (J,b)^n$ for $n
\gg 0$. In the case of analytic spread one Polini and Ulrich show that this is
true with even weaker assumptions (\cite[Theorem 3.4]{PU}). We give a negative
answer to this question for higher analytic spreads and suggest a formula for
the core of such ideals.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 01:43:50 GMT"
},
{
"version": "v2",
"created": "Wed, 10 Oct 2007 22:17:52 GMT"
}
] | 2007-10-11T00:00:00 | [
[
"Fouli",
"Louiza",
"",
"University of Texas, Austin"
]
] |
0705.1809 | Rainer Sommer | Damiano Guazzini, Harvey B. Meyer, Rainer Sommer | Non-perturbative renormalization of the chromo-magnetic operator in
Heavy Quark Effective Theory and the B* - B mass splitting | 15 pages + appendices | JHEP 0710:081,2007 | 10.1088/1126-6708/2007/10/081 | DESY-07-059, SFB/CPP-07-17, MIT-CTP 3838 | hep-lat | null | We carry out the non-perturbative renormalization of the chromo-magnetic
operator in Heavy Quark Effective Theory. At order 1/m of the expansion, the
operator is responsible for the mass splitting between the pseudoscalar and
vector B mesons. We obtain its two-loop anomalous dimension in a Schr"odinger
functional scheme by successive one-loop conversions to the lattice MS scheme
and the MS-bar scheme. We then compute the scale evolution of the operator
non-perturbatively in the N_f=0 theory between $\mu \approx 0.3$ GeV and $\mu
\approx 100$ GeV, where contact is made with perturbation theory. The overall
renormalization factor that converts the bare lattice operator to its
renormalization group invariant form is given for the Wilson gauge action and
two standard discretizations of the heavy-quark action. As an application, we
find that this factor brings the previous quenched predictions of the B* - B
mass splitting closer to the experimental value than found with a perturbative
renormalization. The same renormalization factor is applicable to the
spin-dependent potentials of Eichten and Feinberg.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 17:23:22 GMT"
}
] | 2009-04-21T00:00:00 | [
[
"Guazzini",
"Damiano",
""
],
[
"Meyer",
"Harvey B.",
""
],
[
"Sommer",
"Rainer",
""
]
] |
0705.1810 | Belinda Kalomeni Dr. | B. Kalomeni, K. Yakut, V. Keskin, O. L.Degirmenci, B. Ulas, and O.
Kose | Absolute properties of the binary system BB Pegasi | 17 pages, 3 figures, accepted for Astronomical Journal | Astron.J.134:642-647,2007 | 10.1086/519493 | null | astro-ph | null | We present a ground based photometry of the low-temperature contact binary BB
Peg. We collected all times of mid-eclipses available in literature and
combined them with those obtained in this study. Analyses of the data indicate
a period increase of 3.0(1) x 10^{-8} days/yr. This period increase of BB Peg
can be interpreted in terms of the mass transfer 2.4 x 10^{-8} Ms yr^{-1} from
the less massive to the more massive component. The physical parameters have
been determined as Mc = 1.42 Ms, Mh = 0.53 Ms, Rc = 1.29 Rs, Rh = 0.83 Rs, Lc =
1.86 Ls, and Lh = 0.94 Ls through simultaneous solution of light and of the
radial velocity curves. The orbital parameters of the third body, that orbits
the contact system in an eccentric orbit, were obtained from the period
variation analysis. The system is compared to the similar binaries in the
Hertzsprung-Russell and Mass-Radius diagram.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 14:21:48 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Kalomeni",
"B.",
""
],
[
"Yakut",
"K.",
""
],
[
"Keskin",
"V.",
""
],
[
"Degirmenci",
"O. L.",
""
],
[
"Ulas",
"B.",
""
],
[
"Kose",
"O.",
""
]
] |
0705.1811 | Yujun Dong | Yujun Dong | Index theory for linear self-adjoint operator equations and nontrivial
solutions for asymptotically linear operator equations | null | null | null | null | math.CA | null | We will first establish an index theory for linear self-adjoint operator
equations. And then with the help of this index theory we will discuss
existence and multiplicity of solutions for asymptotically linear operator
equations by making use of the dual variational methods and Morse theory.
Finally, some interesting examples concerning second order Hamiltonian systems,
first order Hamiltonian systems and elliptical partial differential equations
will be presented to illustrate our results.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 02:20:38 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Dong",
"Yujun",
""
]
] |
0705.1812 | Nancy Gu | Vincent Y. B. Chen and Nancy S. S. Gu | The Cauchy Operator for Basic Hypergeometric Series | 21 pages, to appear in Advances in Applied Mathematics | null | null | null | math.CO | null | We introduce the Cauchy augmentation operator for basic hypergeometric
series. Heine's ${}_2\phi_1$ transformation formula and Sears' ${}_3\phi_2$
transformation formula can be easily obtained by the symmetric property of some
parameters in operator identities. The Cauchy operator involves two parameters,
and it can be considered as a generalization of the operator $T(bD_q)$. Using
this operator, we obtain extensions of the Askey-Wilson integral, the Askey-Roy
integral, Sears' two-term summation formula, as well as the $q$-analogues of
Barnes' lemmas. Finally, we find that the Cauchy operator is also suitable for
the study of the bivariate Rogers-Szeg\"o polynomials, or the continuous big
$q$-Hermite polynomials.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 02:27:58 GMT"
},
{
"version": "v2",
"created": "Mon, 20 Aug 2007 08:32:04 GMT"
},
{
"version": "v3",
"created": "Tue, 21 Aug 2007 06:49:48 GMT"
}
] | 2007-08-21T00:00:00 | [
[
"Chen",
"Vincent Y. B.",
""
],
[
"Gu",
"Nancy S. S.",
""
]
] |
0705.1813 | Yang Xiang | Yang Xiang and Shi-Jie Xiong | Entropy exchange, coherent information and concurrence | 4 pages, 8 figures v2: version accepted for publication in Phys. Rev.
A | Phys. Rev. A 76, 014306 (2007) | 10.1103/PhysRevA.76.014306 | null | quant-ph | null | For a simple model we derive analytic expressions of entropy exchange and
coherent information, from which relations between them and the concurrence are
drawn. We find that in the quantum evolution the entropy exchange exhibits
behavior \textsl{opposite} to that of the concurrence, whereas the coherent
information shows features very similar to those of the concurrence. The
meaning of this result for general systems is discussed.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 13:15:50 GMT"
},
{
"version": "v2",
"created": "Sat, 30 Jun 2007 04:16:05 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Xiang",
"Yang",
""
],
[
"Xiong",
"Shi-Jie",
""
]
] |
0705.1814 | Xiang-Fa Zhou | Xiangfa Zhou, Yongsheng Zhang, Guangcan Guo | Unitary transformations can be identified locally | 6 pages, 1 figure, errors modified | null | 10.1103/PhysRevLett.99.170401 | null | quant-ph | null | We show that in principle, $N$-partite unitary transformations can be
perfectly discriminated under local measurement and classical communication
(LOCC) despite of their nonlocal properties. Based on this result, some related
topics, including the construction of the appropriate quantum circuit together
with the extension to general completely positive trace preserving operations,
are discussed.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 03:53:47 GMT"
},
{
"version": "v2",
"created": "Sat, 19 May 2007 02:02:47 GMT"
},
{
"version": "v3",
"created": "Thu, 31 May 2007 01:04:01 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Zhou",
"Xiangfa",
""
],
[
"Zhang",
"Yongsheng",
""
],
[
"Guo",
"Guangcan",
""
]
] |
0705.1815 | Yuli Lyanda-Geller | Y. Lyanda-Geller, I. A. Shelykh, N.T. Bagraev and N.G. Galkin | Comment on "Experimental Demonstration of the Time Reversal
Aharonov-Casher Effect" | Comment, submitted to Physical Review Letters | null | null | null | cond-mat.mes-hall | null | In a recent Letter, Bergsten and co-authors have studied the resistance
oscillations with gate voltage and magnetic field in arrays of semiconductor
rings and interpreted the oscillatory magnetic field dependence as
Altshuler-Aronov-Spivak (AAS) oscillations and oscillatory dependence on gate
voltage as the Aharonov-Casher (AC) effect. This Comment shows that Bergsten
and co-authors incorrectly identified AAS effect as a source of resistance
oscillations in magnetic field, that spin relaxation in their experimental
setting is strong enough to destroy oscillatory effects of spin origin, and
that the oscillations are caused by changes in carrier density and the Fermi
energy by gate, and are unrelated to spin.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 19:07:26 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Lyanda-Geller",
"Y.",
""
],
[
"Shelykh",
"I. A.",
""
],
[
"Bagraev",
"N. T.",
""
],
[
"Galkin",
"N. G.",
""
]
] |
0705.1816 | Steven B. Giddings | Steven B. Giddings, David J. Gross, and Anshuman Maharana | Gravitational effects in ultrahigh-energy string scattering | 19 pages, harvmac. v2: fixed typos, added refs and discussion of
longitudinal spread. v3: minor changes to agree with published version | Phys.Rev.D77:046001,2008 | 10.1103/PhysRevD.77.046001 | NSF-KITP-07-115 | hep-th gr-qc | null | Ultrahigh-energy string scattering is investigated to clarify the relative
role of string and gravitational effects, and their possible contributions to
nonlocal behavior. Different regimes can be characterized by varying the impact
parameter at fixed energy. In the regime where momentum transfers reach the
string scale, string effects appear subdominant to higher-loop gravitational
processes, approximated via the eikonal. At smaller impact parameters,
"diffractive" or "tidal" string excitation leads to processes dominated by
highly excited strings. However, new evidence is presented that these
excitation effects do not play a direct role in black hole formation, which
corresponds to breakdown of gravitational perturbation theory and appears to
dominate at sufficiently small impact parameters. The estimated amplitudes
violate expected bounds on high-energy behavior for local theories.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 05:21:12 GMT"
},
{
"version": "v2",
"created": "Wed, 22 Aug 2007 17:34:14 GMT"
},
{
"version": "v3",
"created": "Wed, 6 Feb 2008 00:30:05 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Giddings",
"Steven B.",
""
],
[
"Gross",
"David J.",
""
],
[
"Maharana",
"Anshuman",
""
]
] |
0705.1817 | Dragomir Neshev | Dragomir N. Neshev, Andrey A. Sukhorukov, Wieslaw Krolikowski, and
Yuri S. Kivshar | Nonlinear optics and light localization in periodic photonic lattices | to appear in Journal of Nonlinear Optical Physics & Materials (JNOPM) | J. Nonlinear Opt. Phys. Mater. 16, 1-25 (2007) | 10.1142/S0218863507003548 | null | physics.optics | null | We review the recent developments in the field of photonic lattices
emphasizing their unique properties for controlling linear and nonlinear
propagation of light. We draw some important links between optical lattices and
photonic crystals pointing towards practical applications in optical
communications and computing, beam shaping, and bio-sensing.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 05:25:32 GMT"
}
] | 2011-11-09T00:00:00 | [
[
"Neshev",
"Dragomir N.",
""
],
[
"Sukhorukov",
"Andrey A.",
""
],
[
"Krolikowski",
"Wieslaw",
""
],
[
"Kivshar",
"Yuri S.",
""
]
] |
0705.1818 | Basak Gurel | Viktor L. Ginzburg, Basak Z. Gurel | Periodic Orbits of Twisted Geodesic Flows and The Weinstein-Moser
Theorem | 34 pages, 2 figures | null | null | null | math.SG math.DS | null | In this paper, we establish the existence of periodic orbits of a twisted
geodesic flow on all low energy levels and in all dimensions whenever the
magnetic field form is symplectic and spherically rational. This is a
consequence of a more general theorem concerning periodic orbits of autonomous
Hamiltonian flows near Morse-Bott non-degenerate, symplectic extrema. Namely,
we show that all energy levels near such extrema carry periodic orbits,
provided that the ambient manifold meets certain topological requirements. This
result is a partial generalization of the Weinstein-Moser theorem. The proof of
the generalized Weinstein-Moser theorem is a combination of a Sturm-theoretic
argument and a Floer homology calculation.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 06:22:08 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Ginzburg",
"Viktor L.",
""
],
[
"Gurel",
"Basak Z.",
""
]
] |
0705.1819 | Christian Iniotakis | C. Iniotakis, T. Dahm, and N. Schopohl | Effect of Surface Andreev Bound States on the Bean-Livingston Barrier in
d-Wave Superconductors | 4 pages, 3 figures; minor changes; accepted for publication in Phys.
Rev. Lett. | Phys. Rev. Lett. 100, 037002 (2008) | 10.1103/PhysRevLett.100.037002 | null | cond-mat.supr-con | null | We study the influence of surface Andreev bound states in d-wave
superconductors on the Bean-Livingston surface barrier for entry of a vortex
line into a strongly type-II superconductor. Starting from Eilenberger theory
we derive a generalization of London theory to incorporate the anomalous
surface currents arising from the Andreev bound states. This allows us to find
an analytical expression for the modification of the Bean-Livingston barrier in
terms of a single parameter describing the influence of the Andreev bound
states. We find that the field of first vortex entry is significantly enhanced.
Also, the depinning field for vortices near the surface is renormalized. Both
effects are temperature dependent and depend on the orientation of the surface
relative to the d-wave gap function.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 07:55:30 GMT"
},
{
"version": "v2",
"created": "Wed, 5 Dec 2007 09:46:56 GMT"
}
] | 2008-01-23T00:00:00 | [
[
"Iniotakis",
"C.",
""
],
[
"Dahm",
"T.",
""
],
[
"Schopohl",
"N.",
""
]
] |
0705.1820 | Paul D. Jackson | The BABAR Collaboration, B. Aubert, et al | A Search for B+ -> tau+ nu | 13 pages, 12 postscript figures, submitted to Physical Review D | Phys.Rev.D76:052002,2007 | 10.1103/PhysRevD.76.052002 | BABAR-PUB-07/007 | hep-ex | null | We present a search for the decay B+ -> tau+ nu using 383x10^6 BBbar pairs
collected at the Y(4S) resonance with the BABAR detector at the SLAC PEP-II
B-Factory. A sample of events with one reconstructed semileptonic B decay (B-
-> D0 l nu X)) is selected, and in the recoil a search for B+ -> tau+ nu is
performed. The tau is identified in the following channels: tau+ -> e nu nubar,
tau+ -> mu nu nubar, tau+ -> pi+ nu, and tau+ -> pi+ pi0 nu. We measure a
branching fraction of B(B+ -> tau+ nu)=(0.9 +- 0.6(stat.) +- 0.1(syst.)) x
10^-4. In the absence of a significant signal, we calculate an upper limit at
the 90% confidence level of B(B+ -> tau+ nu) < 1.7 x 10^-4. We calculate the
product of the B meson decay constant f_B and |V_ub| to be f_B x |V_ub| =
(7.2^{+2.0}_{-2.8}(stat.) +- 0.2 (syst.)) x 10^-4 GeV.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 09:15:00 GMT"
}
] | 2010-04-12T00:00:00 | [
[
"The BABAR Collaboration",
"",
""
],
[
"Aubert",
"B.",
""
]
] |
0705.1821 | Zheng-Tao Wei | Xue-Qian Li and Zheng-Tao Wei | Unparticle Physics Effects on D0-anti-D0 Mixing | 9 pages, some errors corrected, published version | Phys.Lett.B651:380-383,2007 | 10.1016/j.physletb.2007.06.045 | null | hep-ph | null | The mixing of $K^0-\bar{K^0}$, $D^0-\bar{D^0}$ and
$B_{(s)}^0-\bar{B^0_{(s)}}$ provides a sensitive probe to explore new physics
beyond the Standard Model. The scale invariant unparticle physics recently
proposed by Georgi can induce flavor-changing neutral current and contribute to
the mixing at tree level. We investigate the unparticle effects on
$B^0-\bar{B^0}$ and $D^0-\bar{D^0}$ mixing. Especially, the newly observed
$D^0-\bar{D^0}$ mixing sets the most stringent constraints on the coupling of
the unparticle to quarks.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 09:58:45 GMT"
},
{
"version": "v2",
"created": "Wed, 16 May 2007 02:53:15 GMT"
},
{
"version": "v3",
"created": "Thu, 21 Jun 2007 07:44:47 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Li",
"Xue-Qian",
""
],
[
"Wei",
"Zheng-Tao",
""
]
] |
0705.1822 | Zhe Yang | Shige Peng, Zhe Yang | Anticipated backward stochastic differential equations | Published in at http://dx.doi.org/10.1214/08-AOP423 the Annals of
Probability (http://www.imstat.org/aop/) by the Institute of Mathematical
Statistics (http://www.imstat.org) | Annals of Probability 2009, Vol. 37, No. 3, 877-902 | 10.1214/08-AOP423 | IMS-AOP-AOP423 | math.PR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss new types of differential equations which we call
anticipated backward stochastic differential equations (anticipated BSDEs). In
these equations the generator includes not only the values of solutions of the
present but also the future. We show that these anticipated BSDEs have unique
solutions, a comparison theorem for their solutions, and a duality between them
and stochastic differential delay equations.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 10:12:24 GMT"
},
{
"version": "v2",
"created": "Fri, 26 Jun 2009 10:04:49 GMT"
}
] | 2014-06-30T00:00:00 | [
[
"Peng",
"Shige",
""
],
[
"Yang",
"Zhe",
""
]
] |
0705.1823 | Mark Andrews | Mark Andrews | Bounds to unitary evolution | 5 pages, 8 figures | null | 10.1103/PhysRevA.75.062112 | null | quant-ph | null | Upper and lower bounds are established for the survival probability
$|<\psi(0)|\psi(t)>|^{2}$ of a quantum state, in terms of the energy moments
$<\psi(0)|H^{n}|\psi(0)>$. Introducing a cut-off in the energy generally
enables considerable improvement in these bounds and allows the method to be
used where the exact energy moments do not exist.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 10:14:01 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Andrews",
"Mark",
""
]
] |
0705.1824 | Wieslaw Kubi\'s | Robert Bonnet, Latifa Faouzi, Wies{\l}aw Kubi\'s | Free Boolean algebras over unions of two well orderings | 19 pages | Topology Appl. 156 (2009), no. 7, 1177--1185 | 10.1016/j.topol.2008.12.012 | null | math.GN | null | Given a partially ordered set $P$ there exists the most general Boolean
algebra $F(P)$ which contains $P$ as a generating set, called the {\it free
Boolean algebra} over $P$. We study free Boolean algebras over posets of the
form $P=P_0\cup P_1$, where $P_0,P_1$ are well orderings. We call them {\it
nearly ordinal algebras}.
Answering a question of Maurice Pouzet, we show that for every uncountable
cardinal $\kappa$ there are $2^\kappa$ pairwise non-isomorphic nearly ordinal
algebras of cardinality $\kappa$.
Topologically, free Boolean algebras over posets correspond to compact
0-dimensional distributive lattices. In this context, we classify all closed
sublattices of the product $(\omega_1+1)\times(\omega_1+1)$, thus showing that
there are only $\aleph_1$ many of them. In contrast with the last result, we
show that there are $2^{\aleph_1}$ topological types of closed subsets of the
Tikhonov plank $(\omega_1+1)\times(\omega+1)$.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 10:32:04 GMT"
}
] | 2012-10-23T00:00:00 | [
[
"Bonnet",
"Robert",
""
],
[
"Faouzi",
"Latifa",
""
],
[
"Kubiś",
"Wiesław",
""
]
] |
0705.1825 | Stuart Wyithe | Stuart Wyithe, Avi Loeb and Brian Schmidt | The Correlation Between Star Formation and 21cm Emission During the
Reionization Epoch | 12 pages. 5 figures. Submitted to MNRAS | null | 10.1111/j.1365-2966.2007.12149.x | null | astro-ph | null | Reionization is thought to be dominated by low mass galaxies, while direct
observations of resolved galaxies probe only the most massive, rarest objects.
The cross-correlation between fluctuations in the surface brightness of the
cumulative Ly-alpha emission (which serves as a proxy for the star formation
rate) and the redshifted 21cm signal from neutral hydrogen in the intergalactic
medium (IGM), will directly probe the causal link between the production of
ionizing photons in galaxies and the reionization of the IGM. We discuss the
prospects for detecting this cross-correlation for unresolved galaxies. We find
that on angular scales <10 arc-minutes, detection will be practical using
widefield near-IR imaging from space in combination with the forthcoming
Mileura Widefield Array - Low Frequency Demonstrator. When redshifted 21cm
observations of the neutral IGM are combined with space-based near-IR imaging
of Ly-alpha emission, the detection on angular scales <3 arc-minutes will be
limited by the sensitivity of the 21cm signal, even when a small aperture
optical telescope (~2m) and a moderate field of view (~10 square degrees) are
used. On scales >3 arc-minutes, the measurement of cross-correlation will be
limited by the accuracy of the foreground sky subtraction.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 10:58:57 GMT"
}
] | 2019-08-19T00:00:00 | [
[
"Wyithe",
"Stuart",
""
],
[
"Loeb",
"Avi",
""
],
[
"Schmidt",
"Brian",
""
]
] |
0705.1826 | Gian Mario Manca | G. M. Manca, L. Baiotti, R. De Pietri, L. Rezzolla | Dynamical non-axisymmetric instabilities in rotating relativistic stars | To appear on CQG, NFNR special issue. 16 pages, 5 color figures,
movies from http://www.fis.unipr.it/numrel/BarMode/ResearchBarMode.html | Class.Quant.Grav.24:S171-S186,2007 | 10.1088/0264-9381/24/12/S12 | null | astro-ph gr-qc | null | We present new results on dynamical instabilities in rapidly rotating
neutron-stars. In particular, using numerical simulations in full General
Relativity, we analyse the effects that the stellar compactness has on the
threshold for the onset of the dynamical bar-mode instability, as well as on
the appearance of other dynamical instabilities. By using an extrapolation
technique developed and tested in our previous study [1], we explicitly
determine the threshold for a wide range of compactnesses using four sequences
of models of constant baryonic mass comprising a total of 59 stellar models.
Our calculation of the threshold is in good agreement with the Newtonian
prediction and improves the previous post-Newtonian estimates. In addition, we
find that for stars with sufficiently large mass and compactness, the m=3
deformation is the fastest growing one. For all of the models considered, the
non-axisymmetric instability is suppressed on a dynamical timescale with an m=1
deformation dominating the final stages of the instability. These results,
together with those presented in [1], suggest that an m=1 deformation
represents a general and late-time feature of non-axisymmetric dynamical
instabilities both in full General Relativity and in Newtonian gravity.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 11:46:53 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Manca",
"G. M.",
""
],
[
"Baiotti",
"L.",
""
],
[
"De Pietri",
"R.",
""
],
[
"Rezzolla",
"L.",
""
]
] |
0705.1827 | Bernhard Kroetz | Bernhard Kroetz | Radon transform on real symmetric varieties: kernel and cokernel | Final, fully revised version. 22 pages | Funktsional. Anal. i Prilozhen. 43 (2009), no. 1, 37--54 | null | null | math.RT | null | We define and study the (minimal) Radon transform on a real symmetric
variety.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 11:42:38 GMT"
},
{
"version": "v2",
"created": "Wed, 20 Jun 2007 09:10:09 GMT"
},
{
"version": "v3",
"created": "Mon, 31 Dec 2007 09:56:01 GMT"
}
] | 2009-10-21T00:00:00 | [
[
"Kroetz",
"Bernhard",
""
]
] |
0705.1828 | Gao-Feng Zheng | Ting Cheng, Gao-Feng Zheng | Some Blow-Up Problems for a Semilinear Parabolic Equation with a
Potential | 29 pages | null | null | null | math.AP | null | The blow-up rate estimate for the solution to a semilinear parabolic equation
$u_t=\Delta u+V(x) |u|^{p-1}u$ in $\Omega \times (0,T)$ with 0-Dirichlet
boundary condition is obtained. As an application, it is shown that the
asymptotic behavior of blow-up time and blow-up set of the problem with
nonnegative initial data $u(x,0)=M\vf (x)$ as $M$ goes to infinity, which have
been found in \cite{cer}, are improved under some reasonable and weaker
conditions compared with \cite{cer}.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 12:19:25 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Cheng",
"Ting",
""
],
[
"Zheng",
"Gao-Feng",
""
]
] |
0705.1829 | Moshe Dayan | Moshe Dayan | The Field Perturbation Theory of the Double Correlated Phase in High
Temperature Superconductors | 23 pages Of MSWord in PDF format, 1 figure | J. Supercond. Nov. Mag. 21, 29 (2008) | 10.1007/s10948-007-0293-9 | null | cond-mat.supr-con | null | The Double-Correlated phase in HTSC, and its treatment by field perturbation
theory, is established. In particular, we define the ground state, the
quasi-particle excitations, and construct an appropriate field. We also derive
the unperturbed Hamiltonian, and the propagators for the unperturbed state.
Then we discuss the perturbation Hamiltonian, and show that the Hartree diagram
is significant for both the pseudogap and the superconductive order parameter,
and suggest that it yields the major contribution to these parameters.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 12:37:51 GMT"
},
{
"version": "v2",
"created": "Tue, 17 Jul 2007 07:24:36 GMT"
}
] | 2015-02-20T00:00:00 | [
[
"Dayan",
"Moshe",
""
]
] |
0705.1830 | Georg Raffelt | Georg G. Raffelt (MPI Physik), Alexei Yu. Smirnov (ICTP Trieste) | Self-induced spectral splits in supernova neutrino fluxes | 5 pages, 2 figures, Misprint in Eq.(14) corrected relative to
published version | Phys.Rev.D76:081301,2007; Erratum-ibid.D77:029903,2008 | 10.1103/PhysRevD.76.081301 10.1103/PhysRevD.77.029903 | MPP-2007-53 | hep-ph astro-ph hep-ex | null | In the dense-neutrino region above the neutrino sphere of a supernova (r >
400 km), neutrino-neutrino refraction causes collective flavor transformations.
They can lead to "spectral splits" where an energy E_split splits the
transformed spectrum sharply into parts of almost pure but different flavors.
Unless there is an ordinary MSW resonance in the dense-neutrino region, E_split
is determined by flavor-lepton number conservation alone. Spectral splits are
created by an adiabatic transition between regions of large and small neutrino
density. We solve the equations of motion in the adiabatic limit explicitly and
provide analytic expressions for a generic example.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 13:20:24 GMT"
},
{
"version": "v2",
"created": "Tue, 14 Aug 2007 15:09:08 GMT"
},
{
"version": "v3",
"created": "Fri, 7 Dec 2007 22:50:37 GMT"
}
] | 2014-11-18T00:00:00 | [
[
"Raffelt",
"Georg G.",
"",
"MPI Physik"
],
[
"Smirnov",
"Alexei Yu.",
"",
"ICTP Trieste"
]
] |
0705.1831 | Edward Furlani | E. P. Furlani | Continuous Magnetophoretic Separation of Blood Cells from Plasma at the
Microscale | Submitted to Journal of Applied Physics | null | 10.1088/0022-3727/40/5/001 | null | physics.bio-ph physics.med-ph | null | We present a method for the direct and continuous separation of red and white
blood cells from plasma at the microscale. The method is implemented in a
microfluidic system with magnetic functionality. The fluidic structure within
the microsystem consists of an inlet and a single microfluidic channel with
multiple outlets. The magnetic functionality is provided by an array of
integrated soft-magnetic elements that are embedded transverse and adjacent to
the microchannel. The elements are magnetized using an external field, and once
magnetized they produce a magnetic force on blood cells as they flow through
the microchannel. In whole blood, white blood cells (WBCs) behave as
diamagnetic microparticles, while red blood cells (RBCs) exhibit diamagnetic or
paramagnetic behavior depending on the oxygenation of their hemoglobin. We
study the motion of blood cells through the microchannel using a mathematical
model that takes into account the magnetic, fluidic and gravitational forces on
the cells. We use the model to study blood cell separation, and our analysis
indicates that the microsystem is capable of separating WBC-rich plasma,
deoxygenated RBC-rich plasma and cell-depleted plasma into respective outlets.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 14:02:05 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Furlani",
"E. P.",
""
]
] |
0705.1832 | Cheng-Jie Zhang | Cheng-Jie Zhang, Yong-Sheng Zhang, Shun Zhang, Guang-Can Guo | Optimal entanglement witnesses based on local orthogonal observables | 6 pages, 1 figure; minor changes, references added | Phys. Rev. A 76, 012334 (2007) | 10.1103/PhysRevA.76.012334 | null | quant-ph | null | We show that the entanglement witnesses based on local orthogonal observables
which are introduced in [S. Yu and N.-L. Liu, Phys. Rev. Lett. 95, 150504
(2005)] and [O. G\"uhne, M. Mechler, G. T\'oth and P. Adam, Phys. Rev. A 74,
010301 (2006)] in linear and nonlinear forms can be optimized, respectively. As
applications, we calculate the optimal nonlinear witnesses of pure bipartite
states and show a lower bound on the I-concurrence of bipartite higher
dimensional systems with our method.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 14:05:35 GMT"
},
{
"version": "v2",
"created": "Tue, 15 May 2007 12:38:23 GMT"
},
{
"version": "v3",
"created": "Thu, 2 Aug 2007 04:40:43 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Zhang",
"Cheng-Jie",
""
],
[
"Zhang",
"Yong-Sheng",
""
],
[
"Zhang",
"Shun",
""
],
[
"Guo",
"Guang-Can",
""
]
] |
0705.1833 | Yusuke Sasano | Yusuke Sasano | Remark on the Garnier system in two variables | 4 pages | null | null | null | math.AG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We remark on the Garnier system in two variables.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 17:33:43 GMT"
},
{
"version": "v2",
"created": "Mon, 16 Nov 2009 16:15:54 GMT"
},
{
"version": "v3",
"created": "Wed, 27 Apr 2016 16:17:59 GMT"
}
] | 2016-04-28T00:00:00 | [
[
"Sasano",
"Yusuke",
""
]
] |
0705.1834 | Valery Ilyin | Valery Ilyin, Nataliya Makedonska, Itamar Procaccia and Nurith
Schupper | Mechanical Properties of Glass Forming Systems | null | null | 10.1103/PhysRevE.76.052401 | null | cond-mat.stat-mech cond-mat.mtrl-sci | null | We address the interesting temperature range of a glass forming system where
the mechanical properties are intermediate between those of a liquid and a
solid. We employ an efficient Monte-Carlo method to calculate the elastic
moduli, and show that in this range of temperatures the moduli are finite for
short times and vanish for long times, where `short' and `long' depend on the
temperature. By invoking some exact results from statistical mechanics we offer
an alternative method to compute shear moduli using Molecular Dynamics
simulations, and compare those to the Monte-Carlo method. The final conclusion
is that these systems are not "viscous fluids" in the usual sense, as their
actual time-dependence concatenates solid-like materials with varying local
shear moduli.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 14:08:57 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ilyin",
"Valery",
""
],
[
"Makedonska",
"Nataliya",
""
],
[
"Procaccia",
"Itamar",
""
],
[
"Schupper",
"Nurith",
""
]
] |
0705.1835 | Gennaro Amendola | Gennaro Amendola | Decomposition and Enumeration of Triangulated Surfaces | 22 pages, 11 figures, 2 tables; exposition improved | Experiment. Math. 17-2 (2008) 153-166 | 10.1080/10586458.2008.10129027 | null | math.CO | null | We describe some theoretical results on triangulations of surfaces and we
develop a theory on roots, decompositions and genus-surfaces. We apply this
theory to describe an algorithm to list all triangulations of closed surfaces
with at most a fixed number of vertices. We specialize the theory for the case
where the number of vertices is at most 11 and we get theoretical restrictions
on genus-surfaces allowing us to get the list of triangulations of closed
surfaces with at most 11 vertices.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 15:28:39 GMT"
},
{
"version": "v2",
"created": "Thu, 6 Dec 2007 12:26:00 GMT"
}
] | 2019-01-30T00:00:00 | [
[
"Amendola",
"Gennaro",
""
]
] |
0705.1836 | Saibal Ray | Saibal Ray, Utpal Mukhopadhyay and Partha Pratim Ghosh | Large Number Hypothesis: A Review | 21 pages Latex, 0 figures, submitted to GRG | null | null | null | gr-qc astro-ph | null | Large dimensionless numbers, arising out of ratios of various physical
constants, intrigued many scientists, especially Dirac. Relying on the
coincidence of large numbers, Dirac arrived at the revolutionary hypothesis
that the gravitational constant $G$ should vary inversely as the cosmic time
$t$. This hypothesis of Dirac, known as Large Number Hypothesis (LNH), sparked
off many speculations, arguments and new ideas in terms of applications. Works
done by several authors with LNH as their basic platform are reviewed in this
work. Relationship between some of those works are pointed out here.
Possibility of time-variations of physical constants other than $G$ are also
discussed.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 15:40:03 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Ray",
"Saibal",
""
],
[
"Mukhopadhyay",
"Utpal",
""
],
[
"Ghosh",
"Partha Pratim",
""
]
] |
0705.1837 | Athanase Papadopoulos | Athanase Papadopoulos (IRMA) | A rigidity theorem for the mapping class group action on the space of
unmeasured foliations on a surface | null | null | null | null | math.GT | null | Let $S$ be a surface of finite type which is not a sphere with at most four
punctures, a torus with at most two punctures, or a closed surface of genus
two. Let $\mathcal{MF}$ be the space of equivalence classes of measured
foliations of compact support on $S$ and let $\mathcal{UMF}$ be the quotient
space of $\mathcal{MF}$ obtained by identifying two equivalence classes
whenever they can be represented by topologically equivalent foliations, that
is, forgetting the transverse measure. The extended mapping class group
$\Gamma^*$ of $S$ acts as by homeomorphisms of $\mathcal{UMF}$. We show that
the restriction of the action of the whole homeomorphism group of
$\mathcal{UMF}$ on some dense subset of $\mathcal{UMF}$ coincides with the
action of $\Gamma^*$ on that subset. More precisely, let $\mathcal{D}$ be the
natural image in $\mathcal{UMF}$ of the set of homotopy classes of not
necessarily connected essential disjoint and pairwise nonhomotopic simple
closed curves on $S$. The set $\mathcal{D}$ is dense in $\mathcal{UMF}$, it is
invariant by the action of $\Gamma^*$ on $\mathcal{UMF}$ and the restriction of
the action of $\Gamma^*$ on $\mathcal{D}$ is faithful. We prove that the
restriction of the action on $\mathcal{D}$ of the group
$\mathrm{Homeo}(\mathcal{UMF})$ coincides with the action of $\Gamma^*(S)$ on
that subspace.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 16:13:38 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Papadopoulos",
"Athanase",
"",
"IRMA"
]
] |
0705.1838 | Dietrich Stauffer | C. Tuncay | Physics of randomness and regularities for cities, languages, and their
lifetimes and family trees | 22 pages including all figures; for Int. J. Mod. Phys. C 18 (2007) | null | 10.1142/S0129183107011625 | null | physics.soc-ph | null | Time evolution of the cities and of the languages is considered in terms of
multiplicative noise and fragmentation processes; where power law (Pareto-Zipf
law) and slightly asymmetric log-normal (Gauss) distribution result for the
size distribution of the cities and for that of the languages, respectively.
The cities and the languages are treated differently (and as connected; for
example, the languages split in terms of splitting the cities, etc.) and thus
two distributions are obtained in the same computation at the same time.
Evolutions of lifetimes and families for the cities and the languages are also
studied. We suggest that the regularities may be evolving out of randomness, in
terms of the relevant processes.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 16:28:40 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Tuncay",
"C.",
""
]
] |
0705.1839 | Huy Tai Ha | C-Y. Jean Chan, Christine Cumming, Huy Tai Ha | Cohen-Macaulay multigraded modules | 16 pages | null | null | null | math.AC math.AG | null | Let S be a standard N^r-graded algebra over a local ring A, and let M be a
finitely generated Z^r-graded S-module. We characterize the Cohen-Macaulayness
of M in terms of the vanishing of certain sheaf cohomology modules. As a
consequence, we apply our result to study the Cohen-Macaulayness of multi-Rees
modules (also called Rees modification). Our work extends previous studies on
the Cohen-Macaulayness of multi-Rees algebras.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 16:31:35 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Chan",
"C-Y. Jean",
""
],
[
"Cumming",
"Christine",
""
],
[
"Ha",
"Huy Tai",
""
]
] |
0705.1840 | Stoytcho Yazadjiev | Stoytcho Yazadjiev | Black Saturn with dipole ring | 15 pages, LaTex; v2 some typos corrected; v3 minor changes; v4
references added | Phys.Rev.D76:064011,2007 | 10.1103/PhysRevD.76.064011 | null | hep-th | null | We present a new stationary, asymptotically flat solution of 5D
Einstein-Maxwell gravity describing a Saturn-like black object: a rotating
black hole surrounded by a rotating dipole black ring. The solution is
generated by combining the vacuum black Saturn solution and the vacuum black
ring solution with appropriately chosen parameters. Some basic properties of
the solution are analyzed and the basic quantities are calculated.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 16:34:46 GMT"
},
{
"version": "v2",
"created": "Sun, 3 Jun 2007 17:11:56 GMT"
},
{
"version": "v3",
"created": "Tue, 2 Oct 2007 11:28:47 GMT"
},
{
"version": "v4",
"created": "Sun, 7 Oct 2007 16:39:55 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Yazadjiev",
"Stoytcho",
""
]
] |
0705.1841 | Merav Opher | M. Opher, E. C. Stone and T. I. Gombosi | The Orientation of the Local Interstellar Magnetic Field | null | Science 316:875-878,2007 | 10.1126/science.1139480 | null | astro-ph | null | The orientation of the local interstellar magnetic field introduces
asymmetries in the heliosphere that affect the location of heliospheric radio
emissions and the streaming direction of ions from the termination shock of the
solar wind. We combine observations of radio emissions and energetic particle
streaming with extensive 3D MHD computer simulations of magnetic field draping
over the heliopause to show that the plane of the local interstellar field is ~
60-90 degrees from the galactic plane. This suggests that the field orientation
in the Local Interstellar Cloud differs from that of a larger scale
interstellar magnetic field thought to parallel the galactic plane.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 17:38:45 GMT"
}
] | 2019-08-19T00:00:00 | [
[
"Opher",
"M.",
""
],
[
"Stone",
"E. C.",
""
],
[
"Gombosi",
"T. I.",
""
]
] |
0705.1842 | Victor Goncalves | F. Carvalho, F.O. Duraes, V.P. Goncalves, F.S. Navarra | Gluon saturation and the Froissart bound: a simple approach | 6 pages, 5 figures. Includes additional figures, discussion and
references | Mod. Phys. Lett. A 23 (2008) 2847 | 10.1142/S0217732308028417 | null | hep-ph | null | At very high energies we expect that the hadronic cross sections satisfy the
Froissart bound, which is a well-established property of the strong
interactions. In this energy regime we also expect the formation of the Color
Glass Condensate, characterized by gluon saturation and a typical momentum
scale: the saturation scale $Q_s$. In this paper we show that if a saturation
window exists between the nonperturbative and perturbative regimes of Quantum
Chromodynamics (QCD), the total cross sections satisfy the Froissart bound.
Furthermore, we show that our approach allows us to describe the high energy
experimental data on $pp/p\bar{p}$ total cross sections.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 17:50:10 GMT"
},
{
"version": "v2",
"created": "Wed, 31 Oct 2007 22:56:55 GMT"
}
] | 2014-07-18T00:00:00 | [
[
"Carvalho",
"F.",
""
],
[
"Duraes",
"F. O.",
""
],
[
"Goncalves",
"V. P.",
""
],
[
"Navarra",
"F. S.",
""
]
] |
0705.1843 | Gert H\"utsi | Gert Huetsi | Power spectrum of the maxBCG cluster sample: new evidence for the
acoustic features | 10 pages, submitted to MNRAS | null | null | null | astro-ph | null | We use the direct Fourier method to calculate the redshift-space power
spectrum of the maxBCG cluster catalog (Koester et al. 2007) -- currently by
far the largest existing galaxy cluster sample. The total number of clusters
used in our analysis is 12,616. After accounting for the radial smearing effect
caused by photometric redshift errors and also introducing a simple treatment
for the nonlinear effects, we show that currently favored low matter density
``concordance'' LambdaCDM cosmology provides a very good fit to the estimated
power. Thanks to the large volume (~ 0.4 h^{-3} Gpc^3), high clustering
amplitude (linear effective bias parameter b_{eff} ~ 3x(0.85/sigma_8)), and
sufficiently high sampling density (~ 3x10^{-5} h^{3} Mpc^{-3}) the recovered
power spectrum has high enough signal to noise to allow us to find weak
evidence (~ 2sigma CL) for the acoustic features. These results are encouraging
in light of the several proposed large cluster surveys. In case we use the
photometric redshift errors as suggested in Koester et al. (2007) we are left
with the excess large-scale power which has previously been noticed by several
other authors.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 18:08:02 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Huetsi",
"Gert",
""
]
] |
0705.1844 | Simone Melchionna | Simone Melchionna | Design of quasi-symplectic propagators for Langevin dynamics | null | null | 10.1063/1.2753496 | null | physics.comp-ph | null | A vector field splitting approach is discussed for the systematic derivation
of numerical propagators for deterministic dynamics. Based on the formalism, a
class of numerical integrators for Langevin dynamics are presented for single
and multiple timestep algorithms.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 12:49:00 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Melchionna",
"Simone",
""
]
] |
0705.1845 | Pablo Echenique | Pablo Echenique | Introduction to protein folding for physicists | 53 pages, 18 figures, the figures are at a low resolution due to
arXiv restrictions, for high-res figures, go to http://www.pabloechenique.com | Contemporary Physics 48 (2007) 81-108 | 10.1080/00107510701520843 | null | physics.bio-ph cond-mat.soft physics.chem-ph q-bio.BM | null | The prediction of the three-dimensional native structure of proteins from the
knowledge of their amino acid sequence, known as the protein folding problem,
is one of the most important yet unsolved issues of modern science. Since the
conformational behaviour of flexible molecules is nothing more than a complex
physical problem, increasingly more physicists are moving into the study of
protein systems, bringing with them powerful mathematical and computational
tools, as well as the sharp intuition and deep images inherent to the physics
discipline. This work attempts to facilitate the first steps of such a
transition. In order to achieve this goal, we provide an exhaustive account of
the reasons underlying the protein folding problem enormous relevance and
summarize the present-day status of the methods aimed to solving it. We also
provide an introduction to the particular structure of these biological
heteropolymers, and we physically define the problem stating the assumptions
behind this (commonly implicit) definition. Finally, we review the 'special
flavor' of statistical mechanics that is typically used to study the
astronomically large phase spaces of macromolecules. Throughout the whole work,
much material that is found scattered in the literature has been put together
here to improve comprehension and to serve as a handy reference.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 18:33:50 GMT"
}
] | 2008-11-24T00:00:00 | [
[
"Echenique",
"Pablo",
""
]
] |
0705.1846 | Marcelo Ara\'ujo | M.E. Ara\'ujo and W.R. Stoeger | The Angular-Diameter-Distance-Maximum and Its Redshift as Constraints on
$\Lambda \neq 0$ FLRW Models | 17 Pages, 1 Figure | Mon.Not.Roy.Astron.Soc.394:438-442,2009 | 10.1111/j.1365-2966.2008.14321.x | null | astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The plethora of recent cosmologically relevant data has indicated that our
universe is very well fit by a standard Friedmann-Lema\^{i}tre-Robertson-Walker
(FLRW) model, with $\Omega_{M} \approx 0.27$ and $\Omega_{\Lambda} \approx
0.73$ -- or, more generally, by nearly flat FLRW models with parameters close
to these values. Additional independent cosmological information, particularly
the maximum of the angular-diameter (observer-area) distance and the redshift
at which it occurs, would improve and confirm these results, once sufficient
precise Supernovae Ia data in the range $1.5 < z < 1.8$ become available. We
obtain characteristic FLRW closed functional forms for $C = C(z)$ and
$\hat{M}_0 = \hat{M}_0(z)$, the angular-diameter distance and the density per
source counted, respectively, when $\Lambda \neq 0$, analogous to those we have
for $\Lambda = 0$. More importantly, we verify that for flat FLRW models
$z_{max}$ -- as is already known but rarely recognized -- the redshift of
$C_{max}$, the maximum of the angular-diameter-distance, uniquely gives
$\Omega_{\Lambda}$, the amount of vacuum energy in the universe, independently
of $H_0$, the Hubble parameter. For non-flat models determination of both
$z_{max}$ and $C_{max}$ gives both $\Omega_{\Lambda}$ and $\Omega_M$, the
amount of matter in the universe, as long as we know $H_0$ independently.
Finally, determination of $C_{max}$ automatically gives a very simple
observational criterion for whether or not the universe is flat -- presuming
that it is FLRW.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 19:37:00 GMT"
},
{
"version": "v2",
"created": "Sat, 19 Jul 2008 20:37:35 GMT"
},
{
"version": "v3",
"created": "Thu, 12 Mar 2009 23:56:37 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Araújo",
"M. E.",
""
],
[
"Stoeger",
"W. R.",
""
]
] |
0705.1847 | Alejandra Castro | Alejandra Castro, Joshua L. Davis, Per Kraus and Finn Larsen | Precision Entropy of Spinning Black Holes | 30 pages. v2: typos corrected | JHEP 0709:003,2007 | 10.1088/1126-6708/2007/09/003 | null | hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct spinning black hole solutions in five dimensions that take into
account the mixed gauge-gravitational Chern-Simons term and its supersymmetric
completion. The resulting entropy formula is discussed from several points of
view. We include a Taub-NUT base space in order to test recent conjectures
relating 5D black holes to 4D black holes and the topological string. Our
explicit results show that certain charge shifts have to be taken into account
for these relations to hold. We also compute corrections to the entropy of
black rings in terms of near horizon data.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 19:18:17 GMT"
},
{
"version": "v2",
"created": "Tue, 1 Jul 2008 01:58:29 GMT"
}
] | 2010-02-03T00:00:00 | [
[
"Castro",
"Alejandra",
""
],
[
"Davis",
"Joshua L.",
""
],
[
"Kraus",
"Per",
""
],
[
"Larsen",
"Finn",
""
]
] |
0705.1848 | Oskar Steiner | Oskar Steiner | Recent progresses in the simulation of small-scale magnetic fields | to be published in Modern Solar Facilities - Advanced Solar Science,
F. Kneer, K.G. Puschmann, and A.D. Wittmann (eds.), Universit\"atsverlag
G\"ottingen, 2007, p. 321 - 337, please download pdf-file of better quality
figures from http://www.kis.uni-freiburg.de/~steiner/goettingen.pdf | null | null | null | astro-ph | null | New high-resolution observations reveal that small-scale magnetic flux
concentrations have a delicate substructure on a spatial scale of 0.1''. Its
basic structure can be interpreted in terms of a magnetic flux sheet or tube
that vertically extends through the ambient weak-field or field-free atmosphere
with which it is in mechanical equilibrium. A more refined interpretation comes
from new three-dimensional magnetohydrodynamic simulations that are capable of
reproducing the corrugated shape of magnetic flux concentrations and their
signature in the visible continuum. Furthermore it is shown that the
characteristic asymmetric shape of the contrast profile of facular granules is
an effect of radiative transfer across the rarefied atmosphere of the magnetic
flux concentration. I also discuss three-dimensional radiation
magnetohydrodynamic simulations of the integral layers from the top of the
convection zone to the mid-chromosphere. They show a highly dynamic
chromospheric magnetic field, marked by rapidly moving filaments of stronger
than average magnetic field that form in the compression zone downstream and
along propagating shock fronts. The simulations confirm the picture of flux
concentrations that strongly expand through the photosphere into a more
homogeneous, space filling chromospheric field. Future directions in the
simulation of small-scale magnetic fields are indicated by a few examples of
very recent work.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 19:24:18 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Steiner",
"Oskar",
""
]
] |
0705.1849 | John Goodrick | John Goodrick | When does elementary bi-embeddability imply isomorphism? | 24 pages | null | null | null | math.LO | null | A first-order theory has the Schroder-Bernstein property if any two of its
models that are elementarily bi-embeddable are isomorphic. We prove that if a
countable theory T has the Schroder-Bernstein property then it is classifiable
(it is superstable and has NDOP and NOTOP) and satisfies a slightly stronger
condition than nonmultidimensionality, namely: there cannot be a model M of T,
a type p over M, and an automorphism f of M such that for every two distinct
natural numbers i and j, f^i(p) is orthogonal to f^j(p). We also make some
conjectures about how the class of theories with the Schroder-Bernstein
property can be characterized.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 19:54:03 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Goodrick",
"John",
""
]
] |
0705.1850 | John Goodrick | John Goodrick | The Schroder-Bernstein property for theories of abelian groups | 17 pages | null | null | null | math.LO math.GR | null | A first-order theory has the Schroder-Bernstein property if any two of its
models that are elementarily bi-embeddable are isomorphic. We prove that if G
is an abelian group, then the follwing are equivalent:
1. Th(G, +) has the Schroder-Bernstein property;
2. Th(G, +) is omega-stable;
3. G is the direct sum of a divisible group and a torsion group of bounded
exponent;
4. Th(G, +) is superstable, and if (H, +) is a saturated elementary extension
of (G,+), every map in Aut(H/H^0) is unipotent.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 20:23:51 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Goodrick",
"John",
""
]
] |
0705.1851 | Tobias Kaiser | Tobias Kaiser | The Riemann Mapping Theorem for semianalytic domains and o-minimality | 22 pages | null | 10.1112/plms/pdn034 | null | math.LO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Riemann Mapping Theorem in the case of a bounded simply
connected and semianalytic domain. We show that the germ at 0 of the Riemann
map (i.e. biholomorphic map) from the upper half plane to such a domain can be
realized in a certain quasianalytic class if the angle of the boundary at the
point to which 0 is mapped, is greater than 0. This quasianalytic class was
introduced and used by Ilyashenko in his work on Hilbert's 16th problem. With
this result we can prove that the Riemann map from a bounded simply connected
semianalytic domain onto the unit ball is definable in an o-minimal structure,
provided that at singular boundary points the angles of the boundary are
irrational multiples of $\pi$.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 12:21:52 GMT"
},
{
"version": "v2",
"created": "Mon, 21 Jul 2008 11:44:20 GMT"
}
] | 2014-02-26T00:00:00 | [
[
"Kaiser",
"Tobias",
""
]
] |
0705.1852 | Dapeng Zhan | Dapeng Zhan | Revesibility of chordal SLE | 23 pages; the 2nd version has longer introduction; in the 3rd
version, some typos are corrected thanks to the referee's careful review. The
3rd version is accepted by the Annals of Probability | null | null | null | math.PR | null | We prove that the chordal SLE$_\kappa$ trace is reversible for
$\kappa\in(0,4]$.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 21:24:08 GMT"
},
{
"version": "v2",
"created": "Wed, 16 May 2007 05:41:53 GMT"
},
{
"version": "v3",
"created": "Sun, 23 Sep 2007 01:19:34 GMT"
}
] | 2007-09-23T00:00:00 | [
[
"Zhan",
"Dapeng",
""
]
] |
0705.1853 | David Constantine | David Constantine | 2-Frame flow dynamics and hyperbolic rank rigidity in nonpositive
curvature | 27 pages, 3 figures | null | null | null | math.DG math.DS | null | This paper presents hyperbolic rank rigidity results for rank 1,
nonpositively curved spaces. Let $M$ be a compact, rank 1 manifold with
nonpositive sectional curvature and suppose that along every geodesic in $M$
there is a parallel vector field making curvature $-a^2$ with the geodesic
direction. We prove that $M$ has constant curvature equal to $-a^2$ if $M$ is
odd dimensional, or if $M$ is even dimensional and has sectional curvature
pinched as follows: $-\Lambda^2 < K < -\lambda^2$ where $\lambda/\Lambda >
>.93$. When $-a^2$ is the upper curvature bound this gives a shorter proof of
the hyperbolic rank rigidity theorem of Hamenst\"{a}dt, subject to the pinching
condition in even dimension; in all other cases it is a new result. We also
present a rigidity result using only an assumption on maximal Lyapunov
exponents in direct analogy with work done by Connell. The proof of the main
theorem is simplified considerably by assuming strict negative curvature; in
fact, in all dimensions but 7 and 8 it is then an immediate consequence of
ergodicity of the $(dim(M)-1)$-frame flow. In these exceptional dimensions,
recourse to the dynamics of the 2-frame flow must be made and the scheme of
proof developed there can be generalized to deal with rank 1, nonpositively
curved spaces.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 22:33:53 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Constantine",
"David",
""
]
] |
0705.1854 | Anthony Csizmazia | Anthony Csizmazia | On the Riemann zeta-function, Part I: Outline | 47 pages. PDF. Corrected a few typos | null | null | null | math.GM | null | Results of a multipart work are outlined. Use is made therein of the
conjunction of the Riemann hypothesis, RH, and hypotheses advanced by the
author. Let z(n) be the nth nonreal zero of the Riemann zeta-function with
positive imaginary part in order of magnitude thereof. A relation is obtained,
of the pair z(n) and the first derivative thereat of the zeta-function, to the
preceding such pairs and the values of zeta at the points one-half plus a
nonnegative multiple of four. That relation is derived from two forms of the
density of the Laplace representation, on a certain vertical strip, of a
meromorphic function constructed from zeta. Specific functions which play a
central role therein are proven to have analytic extensions to the entire
complex plane. It is established that the Laplace density is positive. That
positivity implies RH and that each nonreal zero of zeta is simple. A metric
geometry expression of the positivity of the density is derived. An analogous
context is delineated relative to Dirichlet L-functions and the Ramanujan tau
Dirichlet function.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 14:57:21 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Csizmazia",
"Anthony",
""
]
] |
0705.1855 | Seick Kim | Sungwon Cho, Hongjie Dong, Seick Kim | On the Green's matrices of strongly parabolic systems of second order | 33 pages | Indiana Univ. Math. J. 57 (2008) no. 4, pp. 1633--1678. | 10.1512/iumj.2008.57.3293 | null | math.AP | null | We establish existence and various estimates of fundamental matrices and
Green's matrices for divergence form, second order strongly parabolic systems
in arbitrary cylindrical domains under the assumption that solutions of the
systems satisfy an interior H\"{o}lder continuity estimate. We present a
unified approach valid for both the scalar and the vectorial cases.
| [
{
"version": "v1",
"created": "Sun, 13 May 2007 23:54:04 GMT"
}
] | 2008-08-29T00:00:00 | [
[
"Cho",
"Sungwon",
""
],
[
"Dong",
"Hongjie",
""
],
[
"Kim",
"Seick",
""
]
] |
0705.1856 | Carla Bonifazi | C. Bonifazi, A. Letessier-Selvon, and E.M. Santos | A model for the time uncertainty measurements in the Auger surface
detector array | null | Astropart.Phys.28:523-528,2008 | 10.1016/j.astropartphys.2007.09.007 | null | astro-ph | null | The precise determination of the arrival direction of cosmic rays is a
fundamental prerequisite for the search for sources or the study of their
anisotropies on the sky. One of the most important aspects to achieve an
optimal measurement of these directions is to properly take into account the
measurement uncertainties in the estimation procedure. In this article we
present a model for the uncertainties associated with the time measurements in
the Auger surface detector array. We show that this model represents well the
measurement uncertainties and therefore provides the basis for an optimal
determination of the arrival direction. With this model and a description of
the shower front geometry it is possible to estimate, on an event by event
basis, the uncertainty associated with the determination of the arrival
directions of the cosmic rays.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 00:12:30 GMT"
}
] | 2010-04-15T00:00:00 | [
[
"Bonifazi",
"C.",
""
],
[
"Letessier-Selvon",
"A.",
""
],
[
"Santos",
"E. M.",
""
]
] |
0705.1857 | Hilmar Forkel | Hilmar Forkel, Michael Beyer and Tobias Frederico | Linear square-mass trajectories of radially and orbitally excited
hadrons in holographic QCD | 33 pages, 5 figures, updated to the extended version published in
JHEP, vector meson bulk potential and metric corrected, comments and
references added, phenomenology and conclusions unchanged | JHEP0707:077,2007 | 10.1088/1126-6708/2007/07/077 | null | hep-ph hep-th nucl-th | null | We consider a new approach towards constructing approximate holographic duals
of QCD from experimental hadron properties. This framework allows us to derive
a gravity dual which reproduces the empirically found linear square-mass
trajectories of universal slope for radially and orbitally excited hadrons.
Conformal symmetry breaking in the bulk is exclusively due to infrared
deformations of the anti-de Sitter metric and governed by one free mass scale
proportional to Lambda_QCD. The resulting background geometry exhibits dual
signatures of confinement and provides the first examples of holographically
generated linear trajectories in the baryon sector. The predictions for the
light hadron spectrum include new relations between trajectory slopes and
ground state masses and are in good overall agreement with experiment.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 13:45:25 GMT"
},
{
"version": "v2",
"created": "Thu, 2 Aug 2007 02:31:48 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Forkel",
"Hilmar",
""
],
[
"Beyer",
"Michael",
""
],
[
"Frederico",
"Tobias",
""
]
] |
0705.1858 | Krzysztof Gozdziewski | K. Gozdziewski, C. Migaszewski, M. Konacki | A dynamical analysis of the 14 Her planetary system | Revised version, 10 pages with low resolution figures suitable for
arXiv, accepted to MNRAS. The manuscript with full resolution figures may be
downloaded from http://www.astri.uni.torun.pl/~chris/14her.pdf (warning!
large file, 9MB). The definitive version will be/is available at
http://www.blackwellpublishing.com | null | 10.1111/j.1365-2966.2008.12920.x | null | astro-ph | null | Precision radial velocity (RV) measurements of the Sun-like dwarf
14 Herculis published by Naef et. al (2004), Butler et. al (2006) and
Wittenmyer et al (2007) reveal a Jovian planet in a 1760 day orbit and a
trend indicating the second distant object. On the grounds of dynamical
considerations, we test a hypothesis that the trend can be explained by the
presence of an additional giant planet. We derive dynamical limits to th
orbital parameters of the putative outer Jovian companion in an orbit within
~13 AU. In this case, the mutual interactions between the Jovian planets are
important for the long-term stability of the system. The best self-consistent
and stable Newtonian fit to an edge-on configuration of Jovian planets has the
outer planet in 9 AU orbit with a moderate eccentricity ~0.2 and confined to a
zone spanned by the low-order mean motion resonances 5:1 and 6:1. This solution
lies in a shallow minimum of \Chi and persists over a wide range of the system
inclination. Other stable configurations within 1\sigma confidence interval of
the best fit are possible for the semi-major axis of the outer planet in the
range of (6,13) AU and the eccentricity in the range of (0,0.3). The orbital
inclination cannot yet be determined but when it decreases, both planetary
masses approach ~10 Jupiter masses and for ~30 deg the hierarchy of the masses
is reversed.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 01:39:33 GMT"
},
{
"version": "v2",
"created": "Sat, 5 Jan 2008 09:07:29 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Gozdziewski",
"K.",
""
],
[
"Migaszewski",
"C.",
""
],
[
"Konacki",
"M.",
""
]
] |
0705.1859 | Q Luo | Qinghuan Luo | X-ray emission from magnetic dissipation in the magnetar magnetosphere | 12 pages, 3 figures, Advances in Space Research, in press | Adv.Space Res.40:1460-1465,2007 | 10.1016/j.asr.2007.01.056 | null | astro-ph | null | Magnetic dissipation through decay of Alfven waves in the magnetar
magnetosphere is discussed. Transport of magnetic fields in the star leads to
dissipation of the magnetic energy through either direct internal heating or
transferring of the energy in waves that decay in the magnetar magnetosphere.
In the latter case, the Alfven waves are excited by crust dislocations or
elastic waves underneath the star's surface. It is suggested that these Alfven
waves can decay into ion sound waves which can be effectively damped leading to
strong plasma heating. Hot plasmas expand producing transient X-rays.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 02:02:03 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Luo",
"Qinghuan",
""
]
] |
0705.1860 | Chris Pearson | Chris P. Pearson, Woong-Seob Jeong, S. Matsuura, H. Matsuhara, T.
Nakagawa, H. Shibai, M. Kawada, T. Takagi, H. M. Lee, M. Shirahata | Galaxy Colours in the AKARI Deep SEP Survey | Accepted for publication in Advances in Space Research. COSPAR,
Beijing, 2006, E1.6 Advances in FIR and Submillimeter Astrophysics. (13
pages, 2 colour figures) | Adv.Space Res.40:605-611,2007 | 10.1016/j.asr.2007.05.007 | null | astro-ph | null | We investigate the segregation of the extragalactic population via colour
criteria to produce an efficient and inexpensive methodology to select specific
source populations as a function of far-infrared flux. Combining galaxy
evolution scenarios and a detailed spectral library of galaxies, we produce
simulated catalogues incorporating segregation of the extragalactic population
into component types (Normal, star-forming, AGN) via color cuts. As a practical
application we apply our criteria to the deepest survey to be undertaken in the
far-infrared with the AKARI (formerly ASTRO-F) satellite. Using the
far-infrared wavebands of the Far-Infrared Surveyor (FIS, one of the
focal-plane instruments on AKARI) we successfully segregate the normal,
starburst and ULIRG populations. We also show that with additional MIR imaging
from AKARI's Infrared Camera (IRC), significant contamination and/or degeneracy
can be further decreased and show a particular example of the separation of
cool normal galaxies and cold ULIRG sources. We conclude that our criteria
provide an efficient means of selecting source populations (including rare
luminous objects) and produce colour-segregated source counts without the
requirement of time intensive ground-based follow up to differentiate between
the general galaxy population.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 02:49:58 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Pearson",
"Chris P.",
""
],
[
"Jeong",
"Woong-Seob",
""
],
[
"Matsuura",
"S.",
""
],
[
"Matsuhara",
"H.",
""
],
[
"Nakagawa",
"T.",
""
],
[
"Shibai",
"H.",
""
],
[
"Kawada",
"M.",
""
],
[
"Takagi",
"T.",
""
],
[
"Lee",
"H. M.",
""
],
[
"Shirahata",
"M.",
""
]
] |
0705.1861 | Jacob Bean | Jacob L. Bean, Barbara E. McArthur, G. Fritz Benedict, Thomas E.
Harrison, Dmitry Bizyaev, Edmund Nelan, and Verne V. Smith | The Mass of the Candidate Exoplanet Companion to HD 33636 from Hubble
Space Telescope Astrometry and High-Precision Radial Velocities | 33 pages, 6 figures, accepted for publication in AJ; added reference
to section 6 | Astron.J.134:749-758,2007 | 10.1086/519956 | null | astro-ph | null | We have determined a dynamical mass for the companion to HD 33636 which
indicates it is a low-mass star instead of an exoplanet. Our result is based on
an analysis of Hubble Space Telescope (HST) astrometry and ground-based radial
velocity data. We have obtained high-cadence radial velocity measurements
spanning 1.3 years of HD 33636 with the Hobby-Eberly Telescope at McDonald
Observatory. We combined these data with previously published velocities to
create a data set that spans nine years. We used this data set to search for,
and place mass limits on, the existence of additional companions in the HD
33636 system. Our high-precision astrometric observations of the system with
the HST Fine Guidance Sensor 1r span 1.2 years. We simultaneously modeled the
radial velocity and astrometry data to determine the parallax, proper motion,
and perturbation orbit parameters of HD 33636. Our derived parallax, pi = 35.6
+/- 0.2 mas, agrees within the uncertainties with the Hipparcos value. We find
a perturbation period P = 2117.3 +/- 0.8 days, semimajor axis a_A = 14.2 +/-
0.2 mas, and system inclination i = 4.1 +/- 0.1 deg. Assuming the mass of the
primary star M_A = 1.02 +/- 0.03 M_sun, we obtain a companion mass M_B = 142
+/- 11 M_jup = 0.14 +/- 0.01 M_sun. The much larger true mass of the companion
relative to its minimum mass estimated from the spectroscopic orbit parameters
(M sin i = 9.3 M_jup) is due to the near face-on orbit orientation. This result
demonstrates the value of follow-up astrometric observations to determine the
true masses of exoplanet candidates detected with the radial velocity method.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 13:43:04 GMT"
},
{
"version": "v2",
"created": "Mon, 21 May 2007 18:03:25 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Bean",
"Jacob L.",
""
],
[
"McArthur",
"Barbara E.",
""
],
[
"Benedict",
"G. Fritz",
""
],
[
"Harrison",
"Thomas E.",
""
],
[
"Bizyaev",
"Dmitry",
""
],
[
"Nelan",
"Edmund",
""
],
[
"Smith",
"Verne V.",
""
]
] |
0705.1862 | Woong-Seob Jeong | Woong-Seob Jeong (1), Chris P. Pearson (1 and 2), Hyung Mok Lee (3),
Shuji Matsuura (1), Mitsunobu Kawada (4), Takao Nakagawa (1), Sang Hoon Oh
(3), Mai Shirahata (1), Sungho Lee (5), Ho Seong Hwang (3), Hideo Matsuhara
(1) ((1) ISAS/JAXA, Japan, (2) ESAC, Spain, (3) Seoul Nat'l Univ., Korea, (4)
Nagoya Univ., Japan, (5) KASI, Korea) | Detection of CFIRB with AKARI/FIS Deep Observations | 12 pages, 5 figures, uses elsart.cls, Accepted for publication in
Advances in Space Research, 36th COSPAR Scientific Assembly Beijing, China,
16 ~ 23 July 2006 | Adv.Space Res.40:600-604,2007 | 10.1016/j.asr.2007.05.010 | null | astro-ph | null | The Cosmic Far-Infrared Background (CFIRB) contains information about the
number and distribution of contributing sources and thus gives us an important
key to understand the evolution of galaxies. Using a confusion study to set a
fundamental limit to the observations, we investigate the potential to explore
the CFIRB with AKARI/FIS deep observations. The Far-Infrared Surveyor (FIS) is
one of the focal-plane instruments on the AKARI (formerly known as ASTRO-F)
satellite, which was launched in early 2006. Based upon source distribution
models assuming three different cosmological evolutionary scenarios (no
evolution, weak evolution, and strong evolution), an extensive model for
diffuse emission from infrared cirrus, and instrumental noise estimates, we
present a comprehensive analysis for the determination of the confusion levels
for deep far-infrared observations. We use our derived sensitivities to suggest
the best observational strategy for the AKARI/FIS mission to detect the CFIRB
fluctuations. If the source distribution follows the evolutionary models,
observations will be mostly limited by source confusion. We find that we will
be able to detect the CFIRB fluctuations and that these will in turn provide
information to discriminate between the evolutionary scenarios of galaxies in
most low-to-medium cirrus regions.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 02:49:58 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Jeong",
"Woong-Seob",
"",
"1 and 2"
],
[
"Pearson",
"Chris P.",
"",
"1 and 2"
],
[
"Lee",
"Hyung Mok",
""
],
[
"Matsuura",
"Shuji",
""
],
[
"Kawada",
"Mitsunobu",
""
],
[
"Nakagawa",
"Takao",
""
],
[
"Oh",
"Sang Hoon",
""
],
[
"Shirahata",
"Mai",
""
],
[
"Lee",
"Sungho",
""
],
[
"Hwang",
"Ho Seong",
""
],
[
"Matsuhara",
"Hideo",
""
]
] |
0705.1863 | Konstantin Borovkov | K. A. Borovkov and G. Last | On level crossings for a general class of piecewise-deterministic Markov
processes | 25 pages | J.Appl.Probab. 40 (2008) 815-834 | null | null | math.PR | null | We consider a piecewise-deterministic Markov process governed by a jump
intensity function, a rate function that determines the behaviour between
jumps, and a stochastic kernel describing the conditional distribution of jump
sizes. We study the point process of upcrossings of a level $b$ by the Markov
process. Our main result shows that, under a suitable scaling $\nu(b)$, the
point process converges, as $b$ tends to infinity, weakly to a geometrically
compound Poisson process. We also prove a version of Rice's formula relating
the stationary density of the process to level crossing intensities. This
formula provides an interpretation of the scaling factor $\nu(b)$. While our
proof of the limit theorem requires additional assumptions, Rice's formula
holds whenever the (stationary) overall intensity of jumps is finite.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 03:06:06 GMT"
}
] | 2010-09-22T00:00:00 | [
[
"Borovkov",
"K. A.",
""
],
[
"Last",
"G.",
""
]
] |
0705.1864 | Zvi Bern | Z. Bern, J. J. M. Carrasco, H. Johansson and D. A. Kosower | Maximally Supersymmetric Planar Yang-Mills Amplitudes at Five Loops | 52 pages, 20 figures, revtex | Phys.Rev.D76:125020,2007 | 10.1103/PhysRevD.76.125020 | UCLA/07/TEP/04, ZU-TH 12/07 and Saclay/SPhT-T07/050 | hep-th | null | We present an ansatz for the planar five-loop four-point amplitude in
maximally supersymmetric Yang-Mills theory in terms of loop integrals. This
ansatz exploits the recently observed correspondence between integrals with
simple conformal properties and those found in the four-point amplitudes of the
theory through four loops. We explain how to identify all such integrals
systematically. We make use of generalized unitarity in both four and D
dimensions to determine the coefficients of each of these integrals in the
amplitude. Maximal cuts, in which we cut all propagators of a given integral,
are an especially effective means for determining these coefficients. The set
of integrals and coefficients determined here will be useful for computing the
five-loop cusp anomalous dimension of the theory which is of interest for
non-trivial checks of the AdS/CFT duality conjecture. It will also be useful
for checking a conjecture that the amplitudes have an iterative structure
allowing for their all-loop resummation, whose link to a recent string-side
computation by Alday and Maldacena opens a new venue for quantitative AdS/CFT
comparisons.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 03:29:04 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Bern",
"Z.",
""
],
[
"Carrasco",
"J. J. M.",
""
],
[
"Johansson",
"H.",
""
],
[
"Kosower",
"D. A.",
""
]
] |
0705.1865 | Thomas Vojta | J. A. Hoyos, Chetan Kotabage, Thomas Vojta | Effects of dissipation on a quantum critical point with disorder | 4 pages, 1 figure, final version, as published | Phys. Rev. Lett. 99, 230601 (2007) | 10.1103/PhysRevLett.99.230601 | null | cond-mat.str-el | null | We study the effects of dissipation on a disordered quantum phase transition
with O$(N)$ order parameter symmetry by applying a strong-disorder
renormalization group to the Landau-Ginzburg-Wilson field theory of the
problem. We find that Ohmic dissipation results in a non-perturbative
infinite-randomness critical point with unconventional activated dynamical
scaling while superohmic damping leads to conventional behavior. We discuss
applications to the superconductor-metal transition in nanowires and to Hertz'
theory of the itinerant antiferromagnetic transition.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 03:41:16 GMT"
},
{
"version": "v2",
"created": "Fri, 18 May 2007 22:19:21 GMT"
},
{
"version": "v3",
"created": "Tue, 4 Dec 2007 15:49:03 GMT"
}
] | 2007-12-04T00:00:00 | [
[
"Hoyos",
"J. A.",
""
],
[
"Kotabage",
"Chetan",
""
],
[
"Vojta",
"Thomas",
""
]
] |
0705.1866 | Wen Bin Song | W.B. Song | Large-scale solar cycle features of solar photospheric magnetic field | 6 pages, 4 figures; Accepted by AdSR; | Adv.Space Res.39:1749-1752,2007 | 10.1016/j.asr.2007.01.052 | null | astro-ph | null | It is well accepted that the solar cycle originates from a
magnetohydrodynamics dynamo deep inside the Sun. Many dynamo models have long
been proposed based on a lot of observational constraints. In this paper, using
342 NSO/Kitt Peak solar synoptic charts we study the solar cycle phases in
different solar latitudinal zones to set further constraints. Our results can
be summarized as follows. (1) The variability of solar polar regions' area has
a correlation with total unsigned magnetic flux in advance of 5 years. (2) The
high-latitude region mainly appears unipolar in the whole solar cycle and its
flux peak time lags sunspot cycle for 3 years. (3) For the activity belt, it is
not surprised that its phase be the same as sunspot's. (4) The flux peak time
of the low-latitude region shifts forward with an average gradient of 32.2
$day/deg$. These typical characteristics may provide some hints for
constructing an actual solar dynamo.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 03:46:36 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Song",
"W. B.",
""
]
] |
0705.1867 | Jorge Vitorio Pereira | Thiago Fassarella, Jorge Vit\'orio Pereira | On the degree of Polar Transformations -- An approach through
Logarithmic Foliations | null | Selecta Mathematica, Volume 13, Number 2 / October, 2007 | 10.1007/s00029-007-0040-x | null | math.AG | null | We investigate the degree of the polar transformations associated to a
certain class of multi-valued homogeneous functions. In particular we prove
that the degree of the pre-image of generic linear spaces by a polar
transformation associated to a homogeneous polynomial $F$ is determined by the
zero locus of $F$. For zero dimensional-dimensional linear spaces this was
conjecture by Dolgachev and proved by Dimca-Papadima using topological
arguments. Our methods are algebro-geometric and rely on the study of the Gauss
map of naturally associated logarithmic foliations.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 03:55:35 GMT"
}
] | 2010-04-02T00:00:00 | [
[
"Fassarella",
"Thiago",
""
],
[
"Pereira",
"Jorge Vitório",
""
]
] |
0705.1868 | Kunio Ishida | Kunio Ishida, Fumihiko Aiga, and Kazuhiko Misawa | Nonlinear optical response of wave packets on quantized potential energy
surfaces | 19 pages, 6 figures, 1 table | J. Chem. Phys. 127, 194304 (2007) | 10.1063/1.2805091 | null | physics.chem-ph | null | We calculated the dynamics of nuclear wave packets in coupled
electron-vibration systems and their nonlinear optical responses. We found that
the quantized nature of the vibrational modes is observed in pump-probe spectra
particularly in weakly interacting electron-vibration systems such as cyanine
dye molecules. Calculated results based on a harmonic potential model and
molecular orbital calculations are compared with experimental results, and we
also found that the materials parameters regarding with the geometrical
structure of potential energy surfaces are directly determined by accurate
measurement of time-resolved spectra.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 04:02:06 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ishida",
"Kunio",
""
],
[
"Aiga",
"Fumihiko",
""
],
[
"Misawa",
"Kazuhiko",
""
]
] |
0705.1869 | Stephen Ord | S. M. Ord, S. Johnston and J. Sarkissian | The Magnetic Field of the Solar Corona from Pulsar Observations | 16 pages, 4 figures (1 colour): Submitted to Solar Physics | null | 10.1007/s11207-007-9030-6 | null | astro-ph | null | We present a novel experiment with the capacity to independently measure both
the electron density and the magnetic field of the solar corona. We achieve
this through measurement of the excess Faraday rotation due to propagation of
the polarised emission from a number of pulsars through the magnetic field of
the solar corona. This method yields independent measures of the integrated
electron density, via dispersion of the pulsed signal and the magnetic field,
via the amount of Faraday rotation. In principle this allows the determination
of the integrated magnetic field through the solar corona along many lines of
sight without any assumptions regarding the electron density distribution. We
present a detection of an increase in the rotation measure of the pulsar
J1801$-$2304 of approximately 160 \rad at an elongation of 0.95$^\circ$ from
the centre of the solar disk. This corresponds to a lower limit of the magnetic
field strength along this line of sight of $> 393\mu\mathrm{G}$. The lack of
precision in the integrated electron density measurement restricts this result
to a limit, but application of coronal plasma models can further constrain this
to approximately 20mG, along a path passing 2.5 solar radii from the solar
limb. Which is consistent with predictions obtained using extensions to the
Source Surface models published by Wilcox Solar Observatory
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 04:04:00 GMT"
},
{
"version": "v2",
"created": "Mon, 14 May 2007 22:44:55 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ord",
"S. M.",
""
],
[
"Johnston",
"S.",
""
],
[
"Sarkissian",
"J.",
""
]
] |
0705.1870 | David Hume | D. B. Hume, T. Rosenband and D. J. Wineland | High-fidelity, adaptive qubit measurements through repetitive
information transfer | Added Acknowledgements 4 pages, 4 figures | null | null | null | quant-ph | null | Using two trapped ion species ($\rm{^{27}Al^+}$ and $\rm{^9Be^+}$) as primary
and ancillary systems, we implement qubit measurements based on the repetitive
transfer of information and quantum nondemolition detection. The repetition
provides a natural mechanism for an adaptive measurement strategy, which leads
to exponentially lower error rates compared to using a fixed number of
detection cycles. For a single qubit we demonstrate 99.94 % measurement
fidelity. We also demonstrate a technique for adaptively measuring multiple
qubit states using a single ancilla, and apply the technique to spectroscopy of
an optical clock transition.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 04:21:41 GMT"
},
{
"version": "v2",
"created": "Tue, 15 May 2007 16:41:30 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Hume",
"D. B.",
""
],
[
"Rosenband",
"T.",
""
],
[
"Wineland",
"D. J.",
""
]
] |
0705.1871 | Alexei Sharapov | S.L. Lyakhovich and A.A. Sharapov | Quantization of Donaldson-Uhlenbeck-Yau theory | 13pages | Phys.Lett.B656:265-271,2007 | 10.1016/j.physletb.2007.09.029 | null | hep-th | null | A covariant path-integral quantization is proposed for the non-Lagrangian
gauge theory described by the Donaldson-Uhlenbeck-Yau equation. The
corresponding partition function is shown to admit a nice path-integral
representation in terms of the gauged G/G K\"ahler WZW model. A relationship
with the $J$-formulation of the anti-self-dual Yang-Mills theory is explored.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 15:25:16 GMT"
},
{
"version": "v2",
"created": "Thu, 24 May 2007 15:19:36 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Lyakhovich",
"S. L.",
""
],
[
"Sharapov",
"A. A.",
""
]
] |
0705.1872 | Jen-Chi Lee | Jen-Chi Lee and Yi Yang | Linear Relations and their Breakdown in High Energy Massive String
Scatterings in Compact Spaces | 18 pages, 1 figure | Nucl.Phys.B784:22-35,2007 | 10.1016/j.nuclphysb.2007.06.005 | null | hep-th | null | We calculate high energy massive scattering amplitudes of closed bosonic
string compactified on the torus. For each fixed mass level with given
quantized and winding momenta ((m/R),(1/2)nR), we obtain infinite linear
relations among high energy scattering amplitudes of different string states.
For some kinematic regimes, we discover that linear relations with N_{R}=N_{L}
break down and, simultaneously, the amplitudes enhance to power-law behavior
instead of the usual expoential fall-off behavior at high energies. It is the
space-time T-duality symmetry that plays a role here. This result is consistent
with the coexistence of the linear relations and the softer exponential
fall-off behavior of high energy string scattering amplitudes as we pointed out
prevously. It is also reminiscent of our previous work on the power-law
behavior of high energy string/domain-wall scatterings.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 06:00:30 GMT"
},
{
"version": "v2",
"created": "Fri, 18 May 2007 09:26:26 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Lee",
"Jen-Chi",
""
],
[
"Yang",
"Yi",
""
]
] |
0705.1873 | Altan Baykal | U.Kiziloglu, N.Kiziloglu, A.Baykal, S.K. Yerli, M. Ozbey (Physics
Department, Middle East Technical University) | Optical variabilities in Be/X-ray binary system:GRO J2058+42 | 8 pages, 9 figures. To appear at Astronomy and Astrophysics | null | 10.1051/0004-6361:20077365 | null | astro-ph | null | We present an analysis of long-term optical monitoring observations and
optical spectroscopic observations of the counterpart to CXOU J205847.5+414637
(high mass X-ray binary system). We search for a variability in the light curve
of Be star. We used differential magnitudes in the time series analysis. The
variability search in the optical light curve was made by using different
algorithms. The reduction and analysis of spectra were done by using MIDAS and
its suitable packages. We have performed a frequency search which gave us the
value 2.404 1/day. This value is attributed to the non-radial pulsation of Be
star. H alpha emission line profiles always show double-peaked emissions with a
mean equivalent width of 2.31 \pm 0.19 \AA ~and a peak separation of 516 \pm 45
km/s. This suggests that Be star disk is still present. CXOU J205847.5+414637
is in X-ray quiescent state.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 06:15:27 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Kiziloglu",
"U.",
"",
"Physics\n Department, Middle East Technical University"
],
[
"Kiziloglu",
"N.",
"",
"Physics\n Department, Middle East Technical University"
],
[
"Baykal",
"A.",
"",
"Physics\n Department, Middle East Technical University"
],
[
"Yerli",
"S. K.",
"",
"Physics\n Department, Middle East Technical University"
],
[
"Ozbey",
"M.",
"",
"Physics\n Department, Middle East Technical University"
]
] |
0705.1874 | Sebastian M\"uller | Sebastian M\"uller | A criterion for transience of multidimensional branching random walk in
random environment | null | Electronic Journal of Probability, 13 (2008), 1189-1202 | null | null | math.PR | null | We develop a criterion for transience for a general model of branching Markov
chains. In the case of multi-dimensional branching random walk in random
environment (BRWRE) this criterion becomes explicit. In particular, we show
that \emph{Condition L} of Comets and Popov is necessary and sufficient for
transience as conjectured. Furthermore, the criterion applies to two important
classes of branching random walks and implies that the critical branching
random walk is transient resp. dies out locally.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 06:45:26 GMT"
}
] | 2008-11-12T00:00:00 | [
[
"Müller",
"Sebastian",
""
]
] |
0705.1875 | Andrej Dujella | Andrej Dujella | On Mordell-Weil groups of elliptic curves induced by Diophantine triples | 17 pages; to appear in Glasnik Matematicki 42 (2007) | Glas. Mat. Ser. III 42 (2007), 3-18 | 10.3336/gm.42.1.01 | null | math.NT | null | We study the possible structure of the groups of rational points on elliptic
curves of the form y^2=(ax+1)(bx+1)(cx+1), where a,b,c are non-zero rationals
such that the product of any two of them is one less than a square.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 06:52:37 GMT"
}
] | 2021-08-30T00:00:00 | [
[
"Dujella",
"Andrej",
""
]
] |
0705.1876 | Grzegorz Malewicz | Grzegorz Malewicz | Scheduling Dags under Uncertainty | null | null | null | null | cs.DS cs.DM | null | This paper introduces a parallel scheduling problem where a directed acyclic
graph modeling $t$ tasks and their dependencies needs to be executed on $n$
unreliable workers. Worker $i$ executes task $j$ correctly with probability
$p_{i,j}$. The goal is to find a regimen $\Sigma$, that dictates how workers
get assigned to tasks (possibly in parallel and redundantly) throughout
execution, so as to minimize the expected completion time. This fundamental
parallel scheduling problem arises in grid computing and project management
fields, and has several applications.
We show a polynomial time algorithm for the problem restricted to the case
when dag width is at most a constant and the number of workers is also at most
a constant. These two restrictions may appear to be too severe. However, they
are fundamentally required. Specifically, we demonstrate that the problem is
NP-hard with constant number of workers when dag width can grow, and is also
NP-hard with constant dag width when the number of workers can grow. When both
dag width and the number of workers are unconstrained, then the problem is
inapproximable within factor less than 5/4, unless P=NP.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 06:54:42 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Malewicz",
"Grzegorz",
""
]
] |
0705.1877 | Michael Ibison | M. Ibison | The reaction-free trajectories of a classical point charge | Extensively revised. Submitted to Found. Phys | null | null | null | physics.gen-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well-known that a classical point charge in 1+1 D hyperbolic motion in
space and time is reaction-free. But this is a special case of a larger set of
reaction-free trajectories that in general are curved paths through space, i.e.
in 2+1 D. This note catalogs the full family of reaction-free trajectories,
giving a geometrical interpretation by which means the curved path possibility
is easily related to the better known case of hyperbolic motion in 1+1 D.
Motivated by the geometry, it is shown how the catalog of motions can be
naturally extended to include the possibility of lossless reaction-free closed
spatial orbits that turn out to be classical pair creation and destruction
events. The extended theory can accommodate a vacuum plenum of classical
current that could be regarded as a classical version of the Fermionic ZPF of
QFT, reminiscent of the relationship between the Electromagnetic ZPF and the
classical imitation that characterizes `Stochastic Electrodynamics'.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 07:12:37 GMT"
},
{
"version": "v2",
"created": "Sat, 22 Dec 2007 05:10:58 GMT"
},
{
"version": "v3",
"created": "Fri, 6 Feb 2009 00:13:02 GMT"
}
] | 2009-02-06T00:00:00 | [
[
"Ibison",
"M.",
""
]
] |
0705.1878 | Hiroyuki Sagawa | H. Sagawa | Isospin asymmetry in the continuum of the A=14 mirror nuclei | 16pages,6figures | J.Phys.G34:949-960,2007 | 10.1088/0954-3899/34/5/013 | null | nucl-th | null | We study the isospin asymmetry in the isoscalar (IS) excitations in the
mirror nuclei $^{14}$O and $^{14}$C by using the Hartree-Fock(HF)+random phase
approximation (RPA) linear response function theory with a Skyrme interaction
to take into account the continuum effect properly. The asymmetry in the IS
monopole, dipole responses is pointed out in the continuum near the particle
threshold with respect to the excitation energy and the sum rule strength. On
the other hand, no clear sign of the asymmetry is found in the giant resonance
(GR) region. In the quadrupole case, the calculated strengths of the mirror
nuclei show almost the same energy dependence from the threshold to the GR
region. It is found that the transition densities of the monopole response show
an extended halo structure near the threshold, while those of GR region show a
typical radial dependence of the compressional collective mode without any halo
effect. Contrary to the transition densities of the monopole response, those of
quadrupole response do not show any sign of the extended feature of wave
functions neither near the threshold nor the GR energy region. Calculated
strength distributions of the IS multipole states are compared with recent
experimental data obtained by the multipole decomposition analysis of $\alpha $
inelastic scattering on $^{14}$O.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 07:25:23 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Sagawa",
"H.",
""
]
] |
0705.1879 | Mohammad M. Sheikh-Jabbari | Q. Exirifard, M. M. Sheikh-Jabbari | Lovelock Gravity at the Crossroads of Palatini and Metric Formulations | Revtex, 4 pp, no figures; v3: Presentation improved, a reference
added | Phys.Lett.B661:158-161,2008 | 10.1016/j.physletb.2008.02.012 | IPM/P-2007/028 | hep-th astro-ph gr-qc | null | We consider extensions of the Einstein-Hilbert Lagrangian to a general
functional of metric and Riemann curvature tensor. A given such Lagrangian
describes two different theories depending on considering connection and metric
(Palatini formulation), or only the metric (metric formulation) as independent
dynamical degrees of freedom. Equivalence of the Palatini and metric
formulations at the level of equations of motion, which as we will argue is a
manifestation of the Equivalence Principle, is the physical criterion that
restricts form of the Lagrangians of modified gravity theories. We prove that
within the class of modified gravity theories we consider, only the Lovelock
gravity satisfies this requirement.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 13:08:30 GMT"
},
{
"version": "v2",
"created": "Sun, 20 May 2007 11:09:01 GMT"
},
{
"version": "v3",
"created": "Thu, 16 Aug 2007 14:13:25 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Exirifard",
"Q.",
""
],
[
"Sheikh-Jabbari",
"M. M.",
""
]
] |
0705.1880 | Tokishiro Karasawa | Tokishiro Karasawa and Masanao Ozawa | Conservation-Law-Induced Quantum Limits for Physical Realizations of the
Quantum NOT Gate | 38 pages, 2 figures | Phys. Rev. A 75, 032324 (2007) | 10.1103/PhysRevA.75.032324 | null | quant-ph | null | In recent investigations, it has been found that conservation laws generally
lead to precision limits on quantum computing. Lower bounds of the error
probability have been obtained for various logic operations from the
commutation relation between the noise operator and the conserved quantity or
from the recently developed universal uncertainty principle for the
noise-disturbance trade-off in general measurements. However, the problem of
obtaining the precision limit to realizing the quantum NOT gate has eluded a
solution from these approaches. Here, we develop a new method for this problem
based on analyzing the trace distance between the output state from the
realization under consideration and the one from the ideal gate. Using the
mathematical apparatus of orthogonal polynomials, we obtain a general lower
bound on the error probability for the realization of the quantum NOT gate in
terms of the number of qubits in the control system under the conservation of
the total angular momentum of the computational qubit plus the the control
system along the direction used to encode the computational basis. The lower
bound turns out to be more stringent than one might expect from previous
results. The new method is expected to lead to more accurate estimates for
physical realizations of various types of quantum computations under
conservation laws, and to contribute to related problems such as the accuracy
of programmable quantum processors.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 10:25:48 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Karasawa",
"Tokishiro",
""
],
[
"Ozawa",
"Masanao",
""
]
] |
0705.1881 | Thorsten Renk | Thorsten Renk and Kari J. Eskola | Charged hadron R_AA as a function of p_T at the LHC | 2 pages, 1 figure, contribution to "Heavy Ion Collisions at the LHC -
Last Call for Predictions" | null | null | null | hep-ph | null | We compute the nuclear suppression factor R_AA for charged hadrons within a
radiative energy loss picture using a hydrodynamical evolution to describe the
soft medium inducing energy loss. A minijet + saturation picture provides
initial conditions for LHC energies and leading order perturbative QCD (LO
pQCD) is used to compute the parton spectrum before distortion by energy loss.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 07:44:57 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Renk",
"Thorsten",
""
],
[
"Eskola",
"Kari J.",
""
]
] |
0705.1882 | Shabbir Ghulam | Ghulam Shabbir | Weyl Projective Curvature Symmetry in FRW k=0 Model | 7pages. submitted | null | null | null | gr-qc | null | A study of proper Weyl projective curvature collineations in FRW k=0
space-time is given using the rank of Weyl projective curvature matrix and
direct integration techniques. It is shown that a very special class of the
above space-time admits proper Weyl projective curvature collineation.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 07:56:40 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Shabbir",
"Ghulam",
""
]
] |
0705.1883 | Jambul Gegelia | J. Gegelia | Asymptotic freedom in massive Yang-Mills theory | 3 pages, no figures | Phys.Rev.D75:087704,2007 | 10.1103/PhysRevD.75.087704 | null | hep-ph | null | An effective field theory model of the massive Yang-Mills theory is
considered. Assuming that the renormalized coupling constants of
'non-renormalizable' interactions are suppressed by a large scale parameter it
is shown that in analogy to the non-abelian gauge invariant theory the
dimensionless coupling constant vanishes logarithmically for large values of
the renormalization scale parameter.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:02:28 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Gegelia",
"J.",
""
]
] |
0705.1884 | Son-Hsien Chen | Son-Hsien Chen, Ming-Hao Liu, Kuo-Wei Chen, Ching-Ray Chang | Broken spin-Hall accumulation symmetry by magnetic field and coexisted
Rashba and Dresselhaus interactions | 3 pages, 2 figures, appears in the proceedings of 10th MMM/INTERMAG
conference | J. Appl. Phys. 101, 09D513 (2007) | 10.1063/1.2712541 | null | cond-mat.mes-hall | null | The spin-Hall effect in the two-dimensional electron gas (2DEG) generates
symmetric out-of-plane spin Sz accumulation about the current axis in the
absence of external magnetic field. Here we employ the real space
Landauer-Keldysh formalism [B. K. Nikolic et al., Phys. Rev. Lett. 95, 046601
(2005); Phys. Rev. B 73, 075303 (2006)] by considering a four-terminal setup to
investigate the circumstances in which this symmetry is broken. For the absence
of Dresselhaus interaction, starting from the applied out-of-plane B
corresponding to Zeeman splitting energy 0 - 0.5 times the Rashba hopping
energy tR, the breaking process is clearly seen. The influence of the Rashba
interaction on the magnetization of the 2DEG is studied herein. For coexisted
Rashba tR and Dresselhaus tD spin-orbit couplings in the absence of B,
interchanging tR and tD reverses the entire accumulation pattern.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:05:12 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Chen",
"Son-Hsien",
""
],
[
"Liu",
"Ming-Hao",
""
],
[
"Chen",
"Kuo-Wei",
""
],
[
"Chang",
"Ching-Ray",
""
]
] |
0705.1885 | Alessandro Papa | V.S. Fadin, R. Fiore, A.V. Grabovsky, A. Papa | The dipole form of the gluon part of the BFKL kernel | 26 pages | Nucl.Phys.B784:49-71,2007 | 10.1016/j.nuclphysb.2007.06.002 | null | hep-ph | null | The dipole form of the gluon part of the colour singlet BFKL kernel in the
next-to-leading order (NLO) is obtained in the coordinate representation by
direct transfer from the momentum representation, where the kernel was
calculated before. With this paper the transformation of the NLO BFKL kernel to
the dipole form, started a few months ago with the quark part of the kernel, is
completed.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 15:38:04 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Fadin",
"V. S.",
""
],
[
"Fiore",
"R.",
""
],
[
"Grabovsky",
"A. V.",
""
],
[
"Papa",
"A.",
""
]
] |
0705.1886 | Francoise Armand | Michel Crampes (LGI2P), Sylvie Ranwez (LGI2P) | Ontology-Supported and Ontology-Driven Conceptual Navigation on the
World Wide Web | null | Proceedings Hypertext 2000 (2000) 80 | null | null | cs.IR | null | This paper presents the principles of ontology-supported and ontology-driven
conceptual navigation. Conceptual navigation realizes the independence between
resources and links to facilitate interoperability and reusability. An engine
builds dynamic links, assembles resources under an argumentative scheme and
allows optimization with a possible constraint, such as the user's available
time. Among several strategies, two are discussed in detail with examples of
applications. On the one hand, conceptual specifications for linking and
assembling are embedded in the resource meta-description with the support of
the ontology of the domain to facilitate meta-communication. Resources are like
agents looking for conceptual acquaintances with intention. On the other hand,
the domain ontology and an argumentative ontology drive the linking and
assembling strategies.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:19:28 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Crampes",
"Michel",
"",
"LGI2P"
],
[
"Ranwez",
"Sylvie",
"",
"LGI2P"
]
] |
0705.1887 | Matteo Gatti | Matteo Gatti, Valerio Olevano, Lucia Reining, Ilya V. Tokatly | Transforming nonlocality into frequency dependence: a shortcut to
spectroscopy | null | Phys. Rev. Lett. 99, 057401 (2007) | 10.1103/PhysRevLett.99.057401 | null | cond-mat.mtrl-sci | null | Measurable spectra are theoretically very often derived from complicated
many-body Green's functions. In this way, one calculates much more information
than actually needed. Here we present an in principle exact approach to
construct effective potentials and kernels for the direct calculation of
electronic spectra. In particular, the potential that yields the spectral
function needed to describe photoemission turns out to be dynamical but {\it
local} and {\it real}. As example we illustrate this ``photoemission
potential'' for sodium and aluminium, modelled as homogeneous electron gas, and
discuss in particular its frequency dependence stemming from the nonlocality of
the corresponding self-energy. We also show that our approach leads to a very
short derivation of a kernel that is known to well describe absorption and
energy-loss spectra of a wide range of materials.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:20:02 GMT"
}
] | 2010-09-08T00:00:00 | [
[
"Gatti",
"Matteo",
""
],
[
"Olevano",
"Valerio",
""
],
[
"Reining",
"Lucia",
""
],
[
"Tokatly",
"Ilya V.",
""
]
] |
0705.1888 | Jing-Min Hou | Jing-Min Hou | Quantum Phases of Ultracold Bosonic Atoms in a Two-Dimensional Optical
Superlattice | null | null | null | null | cond-mat.other | null | We study quantum phases of ultracold bosonic atoms in a two-dimensional
optical superlattice. The extended Bose-Hubbard model derived from the system
of ultracold bosonic atoms in an optical superlattice is solved numerically
with Gutzwiller approach. We find that the modulated superfluid(MS),
Mott-insulator (MI) and density-wave(DW) phases appear in some regimes of
parameters. The experimental detection of the first order correlations and the
second order correlations of different quantum phases with time-of-flight and
noise-correlation techniques is proposed.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:25:58 GMT"
},
{
"version": "v2",
"created": "Tue, 15 May 2007 02:51:43 GMT"
},
{
"version": "v3",
"created": "Mon, 31 Mar 2008 10:04:37 GMT"
}
] | 2008-03-31T00:00:00 | [
[
"Hou",
"Jing-Min",
""
]
] |
0705.1889 | Pavel Balaz | Pavel Balaz, Denis Horvath, Martin Gmitra | The dynamical response to the node defect in thermally activated
remagnetization of magnetic dot array | 4 pages,5 figures, submitted to J. Magn. Magn. Matter | J. Magn. Magn. Mater. 320, 1083 (2008) | 10.1016/j.jmmm.2007.10.028 | null | cond-mat.other | null | The influence of nonmagnetic central node defect on dynamical properties of
regular square-shaped 5 x 5 segment of magnetic dot array under the thermal
activation is investigated via computer simulations. Using stochastic
Landau-Lifshitz-Gilbert equation we simulate hysteresis and relaxation
processes. The remarkable quantitative and qualitative differences between
magnetic dot arrays with nonmagnetic central node defect and magnetic dot
arrays without defects have been found.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:26:39 GMT"
}
] | 2008-09-26T00:00:00 | [
[
"Balaz",
"Pavel",
""
],
[
"Horvath",
"Denis",
""
],
[
"Gmitra",
"Martin",
""
]
] |
0705.1890 | Nayana Shah | N. Shah, A. V. Lopatin | Microscopic analysis of the superconducting quantum critical point:
Finite temperature crossovers in transport near a pair-breaking quantum phase
transition | 20 pages, 9 figures | Phys. Rev. B 76, 094511 (2007) | 10.1103/PhysRevB.76.094511 | null | cond-mat.supr-con cond-mat.mes-hall | null | A microscopic analysis of the superconducting quantum critical point realized
via a pair-breaking quantum phase transition is presented. Finite temperature
crossovers are derived for the electrical conductivity, which is a key probe of
superconducting fluctuations. By using the diagrammatic formalism for
disordered systems, we are able to incorporate the interplay between
fluctuating Cooper pairs and electrons, that is outside the scope of a
time-dependent Ginzburg Landau or effective bosonic action formalism. It is
essential to go beyond the standard approximation in order to capture the zero
temperature correction which results purely from the (dynamic) quantum
fluctuations and dictates the behavior of the conductivity in an entire low
temperature quantum regime. All dynamic contributions are of the same order and
conspire to add up to a negative total, thereby inhibiting the conductivity as
a result of superconducting fluctuations. On the contrary, the classical and
the intermediate regimes are dominated by the positive bosonic channel. Our
theory is applicable in one, two and three dimensions and is relevant for
experiments on superconducting nanowires, doubly-connected cylinders, thin
films and bulk in the presence of magnetic impurities, magnetic field or other
pair-breakers. A window of non-monotonic behavior is predicted to exist as
either the temperature or the pair-breaking parameter is swept.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:27:20 GMT"
}
] | 2007-09-19T00:00:00 | [
[
"Shah",
"N.",
""
],
[
"Lopatin",
"A. V.",
""
]
] |
0705.1891 | Margrethe Wold | M. Wold (1), M. Lacy (2), L. Armus (2) ((1) Institute of Theoretical
Astrophysics, Univ. of Oslo, (2) Spitzer Science Center/Caltech) | The influence of AGN nuclear parameters on the FRI/FRII dichotomy | Accepted for publication in A&A | null | 10.1051/0004-6361:20065266 | null | astro-ph | null | We have investigated the influence of nuclear parameters such as black hole
(BH) mass and photoionizing luminosity on the FRI/FRII transition in a sample
of nearby (z<0.2) 3CR radio galaxies. The sample was observed with
medium-resolution, optical spectroscopy and contains some galaxies with
unpublished velocity dispersion measurements and emission-line fluxes. Measured
velocity dispersions are 130-340 km/s with a mean of 216 km/s. Converting to BH
mass, we find that the BH mass distribution is identical for FRIs and FRIIs,
with a mean of approximately 2.5x10^8 Msun. We convert [OII] and [OIII]
emission-line luminosities to photoionizing luminosity under the assumption
that the gas is ionized by the nuclear UV continuum. Most of the galaxies with
FRI morphology and/or low-excitation emission-line spectra have progressively
lower BH masses at lower photoionizing (and jet) luminosities. This agrees with
the Ledlow-Owen relation which states that the radio luminosity at the FRI/FRII
transition depends on the optical luminosity of the host, L_radio ~
L_optical^1.8, because both L_radio and L_optical relate to AGN nuclear
parameters. When recasting the Ledlow-Owen relation into BH mass versus
photoionizing and jet luminosity, we find that the recasted relation describes
the sample quite well. The FRI/FRII transition occurs at approximately an order
of magnitude lower luminosity relative to the Eddington luminosity than the
soft-to-hard transition in X-ray binaries. This difference is consistent with
the Ledlow-Owen relation, which predicts a weak BH mass dependence in the
transition luminosity. We conclude that the FRI/FRII dichotomy is caused by a
combination of external and nuclear factors, with the latter dominating.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:31:17 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Wold",
"M.",
""
],
[
"Lacy",
"M.",
""
],
[
"Armus",
"L.",
""
]
] |
0705.1892 | Richard Tasgal | Richard S. Tasgal, Y. B. Band, and Boris A. Malomed | Optoacoustic solitons in Bragg gratings | 5 pages, 3 figures | Physical Review Letters 98, 243902 (2007) | 10.1103/PhysRevLett.98.243902 | null | nlin.PS physics.optics | null | Optical gap solitons, which exist due to a balance of nonlinearity and
dispersion due to a Bragg grating, can couple to acoustic waves through
electrostriction. This gives rise to a new species of ``gap-acoustic'' solitons
(GASs), for which we find exact analytic solutions. The GAS consists of an
optical pulse similar to the optical gap soliton, dressed by an accompanying
phonon pulse. Close to the speed of sound, the phonon component is large. In
subsonic (supersonic) solitons, the phonon pulse is a positive (negative)
density variation. Coupling to the acoustic field damps the solitons'
oscillatory instability, and gives rise to a distinct instability for
supersonic solitons, which may make the GAS decelerate and change direction,
ultimately making the soliton subsonic.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:34:40 GMT"
},
{
"version": "v2",
"created": "Wed, 20 Jun 2007 15:58:55 GMT"
}
] | 2007-06-20T00:00:00 | [
[
"Tasgal",
"Richard S.",
""
],
[
"Band",
"Y. B.",
""
],
[
"Malomed",
"Boris A.",
""
]
] |
0705.1893 | V. V. Sinev | G.V. Domogatsky, V.I. Kopeikin, L.A. Mikaelyan, V.V. Sinev | On Possibilities of Studying of Supernova Neutrinos at BAKSAN | null | Phys.Atom.Nucl.70:1081-1087,2007; Yad.Fiz.70:1116-1122,2007 | 10.1134/S1063778807060105 | null | hep-ph | null | We consider the possibilities of studying a supernova collapse neutrino burst
at Baksan Neutrino Observatory (Institute for Nuclear Research, Russian Academy
of Sciences) using the prposed 5-kt target-mass liquid scintillation
spectrometer. Attention is given to the influence of mixing angle
${\theta}_{13}$ on the expected rates and spectra of neutrino events.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 08:49:05 GMT"
}
] | 2010-11-11T00:00:00 | [
[
"Domogatsky",
"G. V.",
""
],
[
"Kopeikin",
"V. I.",
""
],
[
"Mikaelyan",
"L. A.",
""
],
[
"Sinev",
"V. V.",
""
]
] |
0705.1894 | Shahn Majid | Tatiana Gateva-Ivanova and Shahn Majid | Set theoretic solutions of the Yang-Baxter equation, graphs and
computations | 33 pages, 6 .eps figures | null | null | null | math.QA math.CO | null | We extend our recent work on set-theoretic solutions of the Yang-Baxter or
braid relations with new results about their automorphism groups, strong
twisted unions of solutions and multipermutation solutions. We introduce and
study graphs of solutions and use our graphical methods for the computation of
solutions of finite order and their automorphisms. Results include a detailed
study of solutions of multipermutation level 2.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 09:15:07 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Gateva-Ivanova",
"Tatiana",
""
],
[
"Majid",
"Shahn",
""
]
] |
0705.1895 | Paola Marziani | Jack W. Sulentic, Rumen Bachev, Paola Marziani, C. Alenka Negrete,
Deborah Dultzin | CIV 1549 as an Eigenvector 1 Parameter for Active Galactic Nuclei | Accepted for publication in the Astrophysical Journal | Astrophys.J.666:757-777,2007 | 10.1086/519916 | null | astro-ph | null | [Abridged] We have been exploring a spectroscopic unification for all known
types of broad line emitting AGN. The 4D Eigenvector 1 (4DE1) parameter space
shows promise as a unification capable of organizing quasar diversity on a
sequence primarily governed by Eddington ratio. This paper considers the role
of CIV 1549 measures with special emphasis on the CIV 1549 line shift as a
principal 4DE1 diagnostic. We use HST archival spectra for 130 sources with S/N
high enough to permit reliable CIV 1549 broad component (BC) measures. We find
a CIV 1549 BC profile blueshift that is strongly concentrated among (largely
radio-quiet: RQ) sources with FWHM(H beta BC) < 4000 km/s (which we call
Population A). Narrow line Seyfert 1 (NLSy1, with FWHM H beta < 2000 km/s)
sources belong to this population but do not emerge as a distinct class. The
systematic blueshift, widely interpreted as arising in a disk wind/outflow, is
not observed in broader lined AGN which we call Population B. We find new
correlations between FWHM(CIV 1549 BC) and CIV 1549 line shift as well as the
equivalent width of CIV 1549. They are seen only in Pop. A sources. CIV 1549
measures enhance the apparent dichotomy at FWHM(Hbeta BC) approx. 4000 \kms\
(Sulentic et al. 2000) suggesting that it has more significance in the context
of Broad Line Region structure than the more commonly discussed RL vs. RQ
dichotomy. Black hole masses computed from FWHM CIV 1549 BC for about 80 AGN
indicate that the CIV 1549 width is a poor virial estimator. Comparison of mass
estimates derived from Hbeta BC and CIV 1549 reveals that the latter show
different and nonlinear offsets for population A and B sources. A significant
number of sources also show narrow line CIV 1549 emission. We present a recipe
for CIV 1549 narrow component extraction.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 09:15:30 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Sulentic",
"Jack W.",
""
],
[
"Bachev",
"Rumen",
""
],
[
"Marziani",
"Paola",
""
],
[
"Negrete",
"C. Alenka",
""
],
[
"Dultzin",
"Deborah",
""
]
] |
0705.1896 | Keitaro Nagata | Keitaro Nagata, Atsushi Hosaka, V. Dmitra\v{s}inovi\' c | Chiral Properties of Baryon Interpolating Fields | 14 pages | Mod.Phys.Lett.A23:2381-2384,2008 | 10.1142/S0217732308029423 | null | hep-ph | null | We study the chiral transformation properties of all possible local
(non-derivative) interpolating field operators for baryons consisting of three
quarks with two flavors, assuming good isospin symmetry. We derive and use the
relations/identities among the baryon operators with identical quantum numbers
that follow from the combined colour, Dirac and isospin Fierz transformations.
These relations reduce the number of independent baryon operators with any
given spin and isospin. The Fierz identities also effectively restrict allowed
baryon chiral multiplets. It turns out that the chiral multiplets of the
baryons are equivalent to their Lorentz representation. For the two independent
nucleon operators the only permissible chiral multiplet is the fundamental one
$(\frac12,0)\oplus(0,\frac12)$. For the $\Delta$, admissible Lorentz
representations are $(1,\frac12)\oplus (\frac12,1)$ and
$(\frac32,0)\oplus(0,\frac32)$. In the case of the $(1,\frac12)\oplus
(\frac12,1)$ chiral multiplet the $I(J)=\frac32(\frac32)$ $\Delta$ field has
one $I(J)=\frac12(\frac32)$ chiral partner; otherwise it has none. We also
consider the Abelian ($U_A(1)$) chiral transformation properties of fields and
show that each baryon comes in two varieties: 1) with Abelian axial charge +3;
and 2) with Abelian axial charge -1. In case of the nucleon these are the two
Ioffe's fields; in case of the $\Delta$, the $(1,\frac12)\oplus (\frac12,1)$
multiplet has Abelian axial charge -1 and the $(\frac32,0)\oplus(0,\frac32)$
multiplet has Abelian axial charge +3.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 09:43:56 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Nagata",
"Keitaro",
""
],
[
"Hosaka",
"Atsushi",
""
],
[
"c",
"V. Dmitrašinovi\\'",
""
]
] |
0705.1897 | Dean Morgan | Dean Morgan, Elizabeth Winstanley, Jurgen Brunner and Lee F. Thompson | Neutrino telescope modelling of Lorentz invariance violation in
oscillations of atmospheric neutrinos | Title and other presentational changes as requested by the referee;
version accepted for publication in Astroparticle Physics; 22 pages, 11
figures | null | 10.1016/j.astropartphys.2008.03.005 | null | astro-ph hep-ph | null | One possible feature of quantum gravity may be the violation of Lorentz
invariance. In this paper we consider one particular manifestation of the
violation of Lorentz invariance, namely modified dispersion relations for
massive neutrinos. We show how such modified dispersion relations may affect
atmospheric neutrino oscillations. We then consider how neutrino telescopes,
such as ANTARES, may be able to place bounds on the magnitude of this type of
Lorentz invariance violation.
| [
{
"version": "v1",
"created": "Mon, 14 May 2007 09:37:35 GMT"
},
{
"version": "v2",
"created": "Fri, 29 Jun 2007 08:43:48 GMT"
},
{
"version": "v3",
"created": "Wed, 16 Apr 2008 11:42:55 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Morgan",
"Dean",
""
],
[
"Winstanley",
"Elizabeth",
""
],
[
"Brunner",
"Jurgen",
""
],
[
"Thompson",
"Lee F.",
""
]
] |
Subsets and Splits
No saved queries yet
Save your SQL queries to embed, download, and access them later. Queries will appear here once saved.