From: Matthew Davis <mdavis_at_physics.uq.edu.au>

Date: Mon, 18 Jan 2010 22:41:58 +1000

Date: Mon, 18 Jan 2010 22:41:58 +1000

Dear subscribers,

This week's selection was compiled by Chao Feng. It contains 43 new abstracts

and 20 replacements.

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arXiv:0812.3567 (*cross-listing*)

Date: Thu, 18 Dec 2008 16:02:20 GMT (165kb)

Title: Feshbach Resonances and Limiting Thermodynamics of Strongly Correlated

Nucleons

Authors: A.Z.Mekjian

Categories: nucl-th cond-mat.quant-gas

Comments: 8 pages, 4 figures

Journal-ref: Phys.Rev.C80:031601,2009

DOI: 10.1103/PhysRevC.80.031601

\\

A finite temperature model of strongly correlated nucleons with underlying

isospin symmetries is developed. The model can be used to study the role of

bound states and Feshbach resonances on the thermal properties of a spin 1/2,

isospin 1/2 system of protons and neutrons by varying the proton fraction. An

analysis of features associated with a universal thermodynamic limit or unitary

limit is given. In the limit of very large scattering length, the effective

range to quantum thermal wavelength appears as a limiting scale in an

interaction energy and equation of state.

\\ ( http://arxiv.org/abs/0812.3567 , 165kb)

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arXiv:0910.1652

Date: Fri, 9 Oct 2009 05:32:16 GMT (27kb)

Title: Realization of effective super Tonks-Girardeau gases via strongly

attractive one-dimensional Fermi gases

Authors: Shu Chen, Xi-Wen Guan, Xiangguo Yin, Liming Guan and Murray T

Batchelor

Categories: cond-mat.quant-gas cond-mat.stat-mech

Comments: 4 pages, 2 figures

\\

A significant feature of the one-dimensional super Tonks-Girardeau gas is its

metastable gas-like state with a stronger Fermi-like pressure than for free

fermions which prevents a collapse of atoms. This naturally suggests a way to

search for such strongly correlated behaviour in systems of interacting

fermions in one dimension. We thus show that the strongly attractive Fermi gas

without polarization can be effectively described by a super Tonks-Girardeau

gas composed of bosonic Fermi pairs with attractive pair-pair interaction. A

natural description of such super Tonks-Girardeau gases is provided by Haldane

generalized exclusion statistics. In particular, we find that they are

equivalent to ideal particles obeying more exclusive statistics than

Fermi-Dirac statistics.

\\ ( http://arxiv.org/abs/0910.1652 , 27kb)

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arXiv:0910.1658

Date: Fri, 9 Oct 2009 06:49:34 GMT (23kb)

Title: Separability of N-particle Fermionic States for Arbitrary Partitions

Authors: Tsubasa Ichikawa, Toshihiko Sasaki, Izumi Tsutsui

Categories: quant-ph

Comments: 17 pages, 1 figure

\\

We present a criterion of separability for arbitrary s partitions of

N-particle fermionic pure states. We show that, despite the superficial

non-factorizability due to the antisymmetry required by the

indistinguishability of the particles, the states which meet our criterion have

factorizable correlations for a class of observables which are specified

consistently with the states. The separable states and the associated class of

observables share an orthogonal structure, whose non-uniqueness is found to be

intrinsic to the multi-partite separability and leads to the non-transitivity

in the factorizability in general. Our result generalizes the previous result

obtained by Ghirardi et. al. [J. Stat. Phys. 108 (2002) 49] for the s = 2 and s

= N case.

\\ ( http://arxiv.org/abs/0910.1658 , 23kb)

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arXiv:0910.1689

Date: Fri, 9 Oct 2009 09:13:48 GMT (1259kb)

Title: Excitation of coherent polaritons in a two-dimensional atomic lattice

Authors: I.O. Barinov, A.P. Alodjants, S.M. Arakelian

Categories: quant-ph

Comments: 8 pages, 3 figures

Journal-ref: I.O. Barinov, A.P. Alodjants, S.M. Arakelian, Excitation of

coherent polaritons, Quantum Electronics 39 (7) 685 - 690 (2009)

DOI: 10.1070/QE2009v039n07ABEH014020

\\

We describe a new type of spatially periodic structure (lattice models): a

polaritonic crystal (PolC) formed by a two-dimensional lattice of trapped

two-level atoms interacting with quantised electromagnetic field in a cavity

(or in a one-dimensional array of tunnelling-coupled microcavities), which

allows polaritons to be fully localised. Using a one-dimensional polaritonic

crystal as an example, we analyse conditions for quantum degeneracy of a

low-branch polariton gas and those for quantum optical information recording

and storage.

\\ ( http://arxiv.org/abs/0910.1689 , 1259kb)

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arXiv:0910.1717

Date: Fri, 9 Oct 2009 11:45:04 GMT (56kb)

Title: Constructing classical field for a Bose-Einstein condensate in arbitrary

trapping potential; quadrupole oscillations at nonzero temperatures

Authors: Tomasz Karpiuk, Miroslaw Brewczyk, Mariusz Gajda, Kazimierz Rzazewski

Categories: cond-mat.quant-gas

Comments: 9 pages, 9 figures

\\

We optimize the classical field approximation in a version described in J.

Phys. B 40, R1 (2007) for the oscillations of a Bose gas trapped in a harmonic

potential at nonzero temperatures as experimentally investigated by Jin et al.

[Phys. Rev. Lett. 78, 764 (1997)]. Similarly to experiment, the system response

to external perturbation strongly depends on the initial temperature and on the

symmetry of perturbation. While for lower temperatures the thermal cloud

follows the condensed part, for higher temperatures the thermal atoms rather

oscillate with their natural frequency whereas the condensate exhibits the

frequency shift toward the thermal cloud frequency (m=0 mode) or in the

opposite direction (m=2 mode). In the latter case for temperatures approaching

the critical one we find that the condensate begins to oscillate, as in m=0

mode, with the frequency of the thermal atoms.

\\ ( http://arxiv.org/abs/0910.1717 , 56kb)

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arXiv:0910.1749

Date: Fri, 9 Oct 2009 14:41:16 GMT (186kb)

Title: Local and non-local relaxation of a 1D Bose gas with finite interactions

Authors: Dominik Muth, Bernd Schmidt, and Michael Fleischhauer

Categories: quant-ph cond-mat.quant-gas

Comments: 4 pages, 4 figures

\\

We study the relaxation dynamics of a one-dimensional Bose gas after a sudden

change of the interaction strength from zero to a finite value using the

numerical time-evolving block decimation (TEBD) algorithm. It is shown that

local quantities equilibrate to a steady-state value on a short universal time

scale if the interactions are sufficiently strong, i.e. for Tonks parameter

larger than unity. The relaxation of non-local quantities such as

density-density correlations on the other hand is determined by the finite

propagation velocity of oscillatory correlation waves. Although the system is

integrable the steady-state values of local quantities match within the

achievable accuracy to predictions from finite-temperature Bethe-Ansatz in the

grand canonical ensemble.

\\ ( http://arxiv.org/abs/0910.1749 , 186kb)

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arXiv:0910.1765

Date: Fri, 9 Oct 2009 14:49:16 GMT (234kb)

Title: Entanglement of two interacting bosons in a two dimensional isotropic

harmonic trap

Authors: B. Sun and M. Pindzola

Categories: quant-ph cond-mat.quant-gas

Comments: 5 figures

Journal-ref: Physics Letters A, Volume 373, Issue 42, 12 October 2009, Pages

3833-3837

DOI: 10.1016/j.physleta.2009.08.035

\\

We compute the pair entanglement between two interacting bosons in a two

dimensional (2D)isotropic harmonic trap. The interaction potential is modeled

by a 2D regularized pseudo-potential. By analytically decomposing the wave

function into the single particle basis, we show the dependency of the pair

entanglement on the scattering length. Our results turn out to be in good

agreements with earlier results using a quasi-2D geometry.

\\ ( http://arxiv.org/abs/0910.1765 , 234kb)

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arXiv:0910.1773

Date: Fri, 9 Oct 2009 15:08:58 GMT (65kb)

Title: Dynamics of a two-species Bose-Einstein condensate in a double well

Authors: B. Sun and M. S. Pindzola

Categories: cond-mat.stat-mech cond-mat.quant-gas

Comments: 7 pages, 5 figures

Journal-ref: Phys. Rev. A 80, 033616 (2009)

DOI: 10.1103/PhysRevA.80.033616

\\

We study the dynamics of a two-species Bose-Einstein condensate in a double

well. Such a system is characterized by the intraspecies and interspecies

s-wave scattering as well as the Josephson tunneling between the two wells and

the population transfer between the two species. We investigate the dynamics

for some interesting regimes and present numerical results to support our

conclusions. In the case of vanishing intraspecies scattering lengths and a

weak interspecies scattering length, we find collapses and revivals in the

population dynamics. A possible experimental implementation of our proposal is

briefly discussed.

\\ ( http://arxiv.org/abs/0910.1773 , 65kb)

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arXiv:0910.1776

Date: Fri, 9 Oct 2009 15:16:43 GMT (82kb)

Title: Observing collapse in two colliding dipolar Bose-Einstein condensates

Authors: B. Sun and M. S. Pindzola

Categories: cond-mat.stat-mech cond-mat.quant-gas

Comments: 6 pages, 7 figures

Journal-ref: J. Phys. B: At. Mol. Opt. Phys. 42 No 17 (14 September 2009)

175301

DOI: 10.1088/0953-4075/42/17/175301

\\

We study the collision of two Bose-Einstein condensates with pure dipolar

interaction. A stationary pure dipolar condensate is known to be stable when

the atom number is below a critical value. However, collapse can occur during

the collision between two condensates due to local density fluctuations even if

the total atom number is only a fraction of the critical value. Using full

three-dimensional numerical simulations, we observe the collapse induced by

local density fluctuations. For the purpose of future experiments, we present

the time dependence of the density distribution, energy per particle and the

maximal density of the condensate. We also discuss the collapse time as a

function of the relative phase between the two condensates.

\\ ( http://arxiv.org/abs/0910.1776 , 82kb)

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arXiv:0910.1803

Date: Fri, 9 Oct 2009 17:55:36 GMT (478kb,D)

Title: Pi-phases in balanced fermionic superfluids on spin-dependent optical

lattices

Authors: I. Zapata and B. Wunsch and N. T. Zinner and E. Demler

Categories: cond-mat.quant-gas cond-mat.str-el

Comments: 4 pages, 4 figures

\\

We study a balanced two-component system of ultracold fermions in one

dimension with attractive interactions and subject to a spin-dependent optical

lattice potential of opposite sign for the two components. The ground-state

develops a non-trivial superconducting order parameter as the depth of the

lattice is increased. The real-space gap parameter changes sign and is

analogous to the Fulde-Ferrell-Larkin-Ovchnnikov states discussed in the

context of superconductors in magnetic fields. We discuss how to observe these

$\pi$-phases using the rapid-ramp technique. In addition we discuss laser

setups that can produce the required lattices needed for these novel phases to

appear.

\\ ( http://arxiv.org/abs/0910.1803 , 478kb)

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arXiv:0910.1827

Date: Fri, 9 Oct 2009 19:41:19 GMT (142kb)

Title: Tracking spin and charge with spectroscopy in spin-polarised 1D systems

Authors: Tobias Ulbricht and Peter Schmitteckert

Categories: cond-mat.str-el

Comments: 5 pages, 4 figures

\\

We calculate the spectral function of a one-dimensional strongly interacting

chain of fermions, where the response can be well understood in terms of spinon

and holon excitations. Upon increasing the spin imbalance between the spin

species, we observe the single-electron response of the fully polarised system

to emanate from the holon peak while the spinon response vanishes. For

experimental setups that probe one-dimensional properties, we propose this

method as an additional generic tool to aid the identification of spectral

structures, e.g. in ARPES measurements. We show that this applies even to

trapped systems having cold atomic gas experiments in mind.

\\ ( http://arxiv.org/abs/0910.1827 , 142kb)

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arXiv:0910.1859

Date: Fri, 9 Oct 2009 20:52:55 GMT (625kb,D)

Title: Observability of Quantum Criticality and a Continuous Supersolid in

Atomic Gases

Authors: S. Diehl, M. Baranov, A. J. Daley, P. Zoller

Categories: cond-mat.quant-gas

Comments: 4+ pages, 2 figures

\\

We analyze the Bose-Hubbard model with three-body onsite hardcore constraint,

which stabilizes the system for an attractive interparticle interaction and

allows, in particular, the formation of a superfluid phase of bosonic dimers.

Our approach is based on an exact mapping of the constrained Hamiltonian to a

theory of two coupled bosonic degrees of freedom. We demonstrate that the phase

transition between atomic and dimer superfluidity is generically of the first

order as a result of the Coleman-Weinberg phenomenon, while at unit filling we

identify an Ising quantum critical point. At this filling, furthermore, a

symmetry enhancement in the strong coupling limit leads to a continuous

supersolid phase for deeply bound dimers, observable in experiments.

\\ ( http://arxiv.org/abs/0910.1859 , 625kb)

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arXiv:0910.1873

Date: Fri, 9 Oct 2009 22:43:20 GMT (185kb,D)

Title: Matter Wave Scattering from Ultracold Atoms in an Optical Lattice

Authors: Scott N. Sanders (1 and 2), Florian Mintert (3), Eric J. Heller (1)

((1) Harvard University, (2) Massachusetts Institute of Technology, (3)

Albert-Ludwigs-Universit\"at Freiburg)

Categories: cond-mat.quant-gas

Comments: 4 pages, 2 figures

\\

We study matter wave scattering from an ultracold, many body atomic system

trapped in an optical lattice. We determine the angular cross section that a

matter wave probe sees and show that it is strongly affected by the many body

phase, superfluid or Mott insulator, of the target lattice. We determine these

cross sections analytically in the first Born approximation, and we examine the

variation at intermediate points in the phase transition by numerically

diagonalizing the Bose Hubbard Hamiltonian for a small lattice. We show that

matter wave scattering offers a convenient method for non-destructively probing

the quantum many body phase transition of atoms in an optical lattice.

\\ ( http://arxiv.org/abs/0910.1873 , 185kb)

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arXiv:0910.1973

Date: Sun, 11 Oct 2009 06:01:44 GMT (850kb)

Title: Studying the normal-fluid flow in Helium-II using metastable helium

molecules

Authors: W. Guo, J.D. Wright, S.B. Cahn, J.A. Nikkel, D.N. McKinsey

Categories: physics.atom-ph physics.gen-ph

Comments: 6 pages, 4 figures. Accepted by Journal of Low Temperature Physics

\\

We demonstrate that metastable helium molecules can be used as tracers to

visualize the flow of the normal fluid in superfluid $^{4}$He using a

laser-induced-fluorescence technique. The flow pattern of a normal-fluid jet

impinging on the center of a copper disc is imaged. A ring-shaped circulation

structure of the normal fluid is observed as the jet passes across the disc

surface. The fluorescence signal for the molecules trapped in the circulation

structure is measured as a function of time after we turn off the molecule

source. The radiative lifetime and density of the molecules can be determined

by fitting the measured data using a simple analytic model. We also discuss a

proposed experiment on using a previously developed molecule tagging-imaging

technique to visualize the normal-fluid velocity profile during the transition

of quantum turbulence in a thermal counterflow channel.

\\ ( http://arxiv.org/abs/0910.1973 , 850kb)

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arXiv:0910.2064

Date: Mon, 12 Oct 2009 00:57:53 GMT (284kb)

Title: Magnetic blackbody shift of hyperfine transitions for atomic clocks

Authors: J. C. Berengut, V. V. Flambaum, J. King-Lacroix

Categories: physics.atom-ph

\\

We derive an expression for the magnetic blackbody shift of hyperfine

transitions such as the cesium primary reference transition which defines the

second. The shift is found to be a complicated function of temperature, and has

a T^2 dependence only in the high-temperature limit. We also calculate the

shift of ground-state p_1/2 hyperfine transitions which have been proposed as

new atomic clock transitions. In this case interaction with the p_3/2

fine-structure multiplet may be the dominant effect.

\\ ( http://arxiv.org/abs/0910.2064 , 284kb)

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arXiv:0910.2074

Date: Mon, 12 Oct 2009 03:38:47 GMT (146kb)

Title: Precession of Vortices in Dilute Bose-Einstein Condensates at Finite

Temperature

Authors: B. G. Wild and D. A. W. Hutchinson

Categories: cond-mat.quant-gas

Comments: 5 pages, 2 figures

Journal-ref: Phys. Rev. A 80, 035603 (2009)

DOI: 10.1103/PhysRev.140.A452

\\

We demonstrate that the precessional frequencies of vortices in Bose Einstein

condensates (BECs) are determined by a conservation law, and not by the lowest

lying excitation energy mode. We determine the precessional frequency for a

single off-axis vortex and vortex lattices in BECs using the continuity

equation, and solve this self-consistently with the time-independent

Hartree-Fock-Bogoliubov (HFB) equations in the rotating frame. We find

agreement with zero temperature calculations (Bogoliubov approximation), and a

smooth variation in the precession frequency as the temperature is increased.

Time-dependent solutions confirm the validity of these predictions.

\\ ( http://arxiv.org/abs/0910.2074 , 146kb)

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arXiv:0910.2165

Date: Mon, 12 Oct 2009 13:49:59 GMT (36kb)

Title: Condensation transition in a model with attractive particles and

non-local hops

Authors: Apoorva Nagar

Categories: cond-mat.stat-mech

Comments: 11 Pages, 6 Figures. Published in Journal of Statistical Mechanics:

Theory and Experiment

Journal-ref: J. Stat. Mech. (2009) P10003

\\

We study a one dimensional nonequilibrium lattice model with competing

features of particle attraction and non-local hops. The system is similar to a

zero range process (ZRP) with attractive particles but the particles can make

both local and non-local hops. The length of the non-local hop is dependent on

the occupancy of the chosen site and its probability is given by the parameter

$p$. Our numerical results show that the system undergoes a phase transition

from a condensate phase to a homogeneous density phase as $p$ is increased

beyond a critical value $p_c$. A mean-field approximation does not predict a

phase transition and describes only the condensate phase. We provide heuristic

arguments for understanding the numerical results.

\\ ( http://arxiv.org/abs/0910.2165 , 36kb)

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arXiv:0910.2191 (*cross-listing*)

Date: Mon, 12 Oct 2009 16:12:42 GMT (70kb)

Title: On the modification of the Efimov spectrum in a finite cubic box

Authors: Simon Kreuzer, H.-W. Hammer (Bonn U.)

Categories: nucl-th cond-mat.quant-gas hep-lat

Comments: 20 pages, 8 figures

Report-no: HISKP-TH-09-32

\\

Three particles with large scattering length display a universal spectrum of

three-body bound states called "Efimov trimers''. We calculate the modification

of the Efimov trimers of three identical bosons in a finite cubic box and

compute the dependence of their energies on the box size using effective field

theory. Previous calculations for positive scattering length that were

perturbative in the finite volume energy shift are extended to arbitrarily

large shifts and negative scattering lengths. The renormalization of the

effective field theory in the finite volume is explicitly verified. Moreover,

we investigate the effects of partial wave mixing and study the behavior of

shallow trimers near the dimer energy. Finally, we provide numerical evidence

for universal scaling of the finite volume corrections.

\\ ( http://arxiv.org/abs/0910.2191 , 70kb)

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arXiv:0910.2203

Date: Mon, 12 Oct 2009 17:17:49 GMT (35kb)

Title: Phase diagram of the triangular lattice spin-1/2 XXZ model: A

variational viewpoint

Authors: Dariush Heidarian and Arun Paramekanti

Categories: cond-mat.str-el

Comments: 4 pages and 4 figures

\\

We study the spin-1/2 XXZ model on the triangular lattice with a nearest

neighbor antiferromagnetic Ising coupling $J_z>0$ and unfrustrated

($J_\perp<0$) or frustrated ($J_\perp>0$) kinetic terms in zero magnetic field.

Incorporating long-range Jastrow correlations over a mean field spin state, we

obtain the variational phase diagram of this model on large lattices for

arbitrary $J_z$ and either sign of $J_\perp$. For $J_\perp<0$, we find a

$\sqrt{3}\times\sqrt{3}$ supersolid for $J_z/|J_\perp| \gtrsim 4.7$, in

excellent agreement with quantum Monte Carlo data. For $J_\perp >0$, a distinct

$\sqrt{3}\times\sqrt{3}$ supersolid is found to emerge for $J_z/J_\perp \geq

1$. Both supersolids exhibit a spontaneous density deviation from half-filling.

At $J_z/J_\perp=\infty$, the crystalline order parameters of these two

supersolids are nearly identical, consistent with exact results.

\\ ( http://arxiv.org/abs/0910.2203 , 35kb)

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arXiv:0910.2269

Date: Mon, 12 Oct 2009 23:32:43 GMT (633kb)

Title: Exact Solution for 1D Spin-Polarized Fermions with Resonant Interactions

Authors: Adilet Imambekov, Alexander A. Lukyanov, Leonid I. Glazman, Vladimir

Gritsev

Categories: cond-mat.quant-gas cond-mat.str-el

\\

Using asymptotic Bethe Ansatz, we obtain an exact solution of the many-body

problem for 1D spin-polarized fermions with resonant p-wave interactions,

taking into account effects of both scattering volume and effective range.

Under typical experimental conditions, accounting for the effective range

significantly modifies the properties of the system in the resonant regime.

Excitation spectrum of the considered model has several unexpected features,

such as the inverted position of particle-like and hole-like branches at small

momenta, and roton-like minima. We find that the frequency of the "breathing"

mode under harmonic confinement provides an unambiguous signature of the

effective range of interactions at resonant scattering.

\\ ( http://arxiv.org/abs/0910.2269 , 633kb)

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arXiv:0910.2332

Date: Tue, 13 Oct 2009 08:28:41 GMT (268kb)

Title: Trapping of ultra-cold atoms with the magnetic field of vortices in a

thin film superconducting micro-structure

Authors: T. M\"uller, B. Zhang, R. Fermani, K.S. Chan, Z.W. Wang, C.B. Zhang,

M.J. Lim, R. Dumke

Categories: physics.atom-ph

Comments: 4pages, comments are welcome

\\

We store and control ultra-cold atoms in a new type of trap using magnetic

fields of vortices in a high temperature superconducting micro-structure. This

is the first time ultra-cold atoms have been trapped in the field of magnetic

flux quanta. We generate the attractive trapping potential for the atoms by

combining the magnetic field of a superconductor in the remanent state with

external homogeneous magnetic fields. We show the control of crucial atom trap

characteristics such as an efficient intrinsic loading mechanism, spatial

positioning of the trapped atoms and the vortex density in the superconductor.

The measured trap characteristics are in good agreement with our numerical

simulations.

\\ ( http://arxiv.org/abs/0910.2332 , 268kb)

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arXiv:0910.2345

Date: Tue, 13 Oct 2009 09:28:40 GMT (268kb)

Title: Giant Variations of Cooper-Pair Size in Nanoscale Superconductors

Authors: A. A. Shanenko, M. D. Croitoru, A. Vagov, and F. M. Peeters

Categories: cond-mat.supr-con cond-mat.mes-hall

\\

The Cooper-pair size (i.e., the BCS coherence length) in low-dimensional

superconductors is dramatically modified by quantum-size effects. In

particular, for nanowires made of conventional superconducting materials, we

show that the coherence length exhibits size-dependent drops by two-three

orders of magnitude and reaches values found in high-$T_c$ superconductors.

This phenomenon is surprisingly similar to the well-known BCS-BEC crossover but

with one important exception: it is driven by the transverse quantization of

the electron spectrum rather than by the strength of the fermion-fermion

interaction. Similar results can be expected for other systems with the same

structure of the single-particle spectrum, e.g, for superfluid Fermi gases

confined in a quantum-wire or quantum-well geometry.

\\ ( http://arxiv.org/abs/0910.2345 , 268kb)

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arXiv:0910.2431

Date: Tue, 13 Oct 2009 16:24:10 GMT (70kb)

Title: Crystalline phase of fermion pairs made in the p-wave Wannier orbital

Authors: Zixu Zhang, Hsiang-Hsuan Hung, Chiu Man Ho, Erhai Zhao, W. Vincent Liu

Categories: cond-mat.quant-gas cond-mat.str-el

\\

We study an attractive Fermi gas in a quasi-1D optical lattice under a new

condition of large spin imbalance--the spin up and down Fermi levels are

adjusted in the different $p_x$ and $s$ Wannier orbital bands, respectively.

This triggers a new pairing state with two distinctive features absent in

previously known superfluids. First, the interaction between different spins

produces unconventional fermion pairs, which are in the p-wave Wannier orbital,

not the usual nodeless s-wave. Second, the condensate of such pairs leads to a

modulated superfluid with wave vector $Q=k_{F\uparrow}+k_{F\downarrow}$, rather

than the Fermi wavevector difference characteristic of the

Fulde-Ferrell-Larkin-Ovchinnikov phase. Our analysis combines the methods of

mean field theory and density matrix renormalization group. Unique features of

this state are predicted for the proposed molecule projection experiment.

\\ ( http://arxiv.org/abs/0910.2431 , 70kb)

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arXiv:0910.2450

Date: Tue, 13 Oct 2009 18:44:16 GMT (54kb)

Title: Detecting antiferromagnetism of atoms in an optical lattice via optical

Bragg scattering

Authors: T. A. Corcovilos, S. K. Baur, J. M. Hitchcock, E. J. Mueller, R. G.

Hulet

Categories: cond-mat.quant-gas

Comments: 9 pages, 6 figures, 1 table; RevTeX4; submitted to Phys. Rev. A

\\

Antiferromagnetism of ultracold fermions in an optical lattice can be

detected by Bragg diffraction of light, in analogy to the diffraction of

neutrons from solid state materials. A finite sublattice magnetization will

lead to a Bragg peak from the (1/2 1/2 1/2) crystal plane with an intensity

depending on details of the atomic states, the frequency and polarization of

the probe beam, the direction and magnitude of the sublattice magnetization,

and the finite optical density of the sample. Accounting for these effects we

make quantitative predictions about the scattering intensity and find that with

experimentally feasible parameters the signal can be readily measured with a

CCD camera or a photodiode and used to detect antiferromagnetic order.

\\ ( http://arxiv.org/abs/0910.2450 , 54kb)

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arXiv:0910.2471

Date: Tue, 13 Oct 2009 20:52:35 GMT (292kb)

Title: Power law behavior associated with a Fibonacci Lucas model and

generalized statistical models

Authors: Aram Z. Mekjian

Categories: cond-mat.stat-mech cond-mat.dis-nn

Comments: 33 pages, 10 figures,2 tables

\\

A Fibonacci-Lucas based statistical model and several other related models

are studied. The canonical and grand canonical partition functions for these

models are developed.Partition structure such as the distribution of sizes as

in a cluster distribution is explored.Ensemble averaging over all partitions

leads to a scale invariant power law behavior at a particular critical like

point. The canonical ensemble of the Fibonacci-Lucas case involves the

Gegenbauer polynomial.The model has a hyperbolic power law behavior, a feature

linked to the golden mean ratio of two adjacent Fibonacci numbers and also the

connection of Lucas numbers to the golden mean. The relation to other power law

behavior, such as Zipf and Pareto laws, is mentioned. For the cases considered,

the grand canonical ensemble involves the Gauss hypergeometric function

F(a,b,c,z) with specific values for a,b,c. The general case has a variable

power law behavior with tau exponent equal to1+c-a-b. An application with

a=1/2, b=1, c=3 and thus tau=5/2 very closely approximates Bose-Einstein

condensation. The zeta function zeta(3/2)=2.61 of the exact theory is replaced

with 8/3 and zeta(5/2)= 1.34 with 4/3. At the condensation point the number of

cycles of length falls as a scale invariant power law. The cycles, which arise

from permutation symmetries associated with Bose-Einstein statistics, can be

viewed as links in a complex network of connections between particles. This

scale invariant power law parallels that seen in complex networks. The growth

of the network is developed using recurrence properties of the model.

Constraints imposed by the canonical ensemble and associates correlations lead

to some number theoretic connections between Fibonacci and Lucas numbers as an

incidental consequence of this approach.

\\ ( http://arxiv.org/abs/0910.2471 , 292kb)

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arXiv:0910.2499

Date: Wed, 14 Oct 2009 00:09:41 GMT (27kb)

Title: Reduction and Emergence in Bose-Einstein Condensates

Authors: Richard Healey

Categories: quant-ph

\\

A closer look at some proposed Gedanken-experiments on BECs promises to shed

light on several aspects of reduction and emergence in physics. These include

the relations between classical descriptions and different quantum treatments

of macroscopic systems, and the emergence of new properties and even new

objects as a result of spontaneous symmetry breaking.

\\ ( http://arxiv.org/abs/0910.2499 , 27kb)

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\\

arXiv:0910.2564

Date: Wed, 14 Oct 2009 09:24:28 GMT (703kb)

Title: Localization-Delocalization Transition in Ultracold Atomic Mixtures

Authors: Jean-Fran\c{c}ois Schaff, Zehra Akdeniz, Patrizia Vignolo (INLN,

Universit\'e de Nice, CNRS, France; Piri Reis University, Istanbul, Turkey)

Categories: cond-mat.quant-gas

Comments: 5 pages, 4 figures

\\

We propose an experiment to study the transport properties of a Bose-Einstein

condensate in the presence of short-range correlated disorder where defects

appear as dimers (random-dimer model). We suggest an experimental scheme and

calculate the parameters entering the effective Hamiltonian for a realistic

experiment where a first atomic species plays the role of impurities for the

second one. We show that a localization-delocalization transition occurs when

the interspecies scattering length is increased, and evaluate the localization

length and the transmittivity across this transition.

\\ ( http://arxiv.org/abs/0910.2564 , 703kb)

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\\

arXiv:0910.2570 (*cross-listing*)

Date: Wed, 14 Oct 2009 18:49:35 GMT (33kb)

Title: Decoherence and thermalization of a pure quantum state in quantum field

theory

Authors: Alexandre Giraud and Julien Serreau

Categories: hep-ph astro-ph.CO cond-mat.other hep-th nucl-th

Comments: 4 pages, 3 figures

\\

We study the real-time evolution of a self-interacting O(N) scalar field

initially prepared in a pure quantum state. We present a complete solution of

the nonequilibrium quantum dynamics from a 1/N-expansion of the

two-particle-irreducible effective action at next-to-leading order, which

includes scattering and memory effects. Restricting one's attention (or ability

to measure) to a subset of the infinite hierarchy of correlation functions, the

system is described by an effective (reduced) density matrix which, unlike the

full density matrix, has a nontrivial time evolution. In particular, starting

from a pure quantum state, we observe the loss of putity/coherence and, on

longer time scales, thermalization of the reduced density matrix. We point out

that the physics of decoherence is well described by classical statistical

field theory.

\\ ( http://arxiv.org/abs/0910.2570 , 33kb)

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\\

arXiv:0910.2577

Date: Wed, 14 Oct 2009 15:14:12 GMT (20kb)

Title: A novel general mapping for bosonic and fermionic operators in Fock

space

Authors: Alexej I. Streltsov, Ofir E. Alon, and Lorenz S. Cederbaum

Categories: quant-ph

Comments: 29 pages

\\

In this paper we provide a novel and general way to construct the result of

the action of any bosonic or fermionic operator represented in second quantized

form on a state vector, without resorting to the matrix representation of

operators and even to its elements. The new approach is based on our proposal

to compactly enumerate the configurations (i.e., determinants for fermions,

permanents for bosons) which are the elements of the state vector. This

extremely simplifies the calculation of the action of an operator on a state

vector. The computations of statical properties and of the evolution dynamics

of a system become much more efficient and applications to systems made of more

particles become feasible. Explicit formulations are given for spin-polarized

fermionic systems and spinless bosonic systems, as well as to general

(two-component) fermionic systems, two-component bosonic systems, and mixtures

thereof.

\\ ( http://arxiv.org/abs/0910.2577 , 20kb)

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\\

arXiv:0910.2598

Date: Wed, 14 Oct 2009 12:18:05 GMT (356kb)

Title: Nanowire atomchip traps for sub-micron atom-surface distances

Authors: R. Salem, Y. Japha, J. Chab\'e, B. Hadad, M. Keil, K. A. Milton and R.

Folman

Categories: quant-ph cond-mat.quant-gas

Comments: 19 pages, 10 figure in 14 files

\\

We present an analysis of magnetic traps for ultracold atoms based on

current-carrying wires with sub-micron dimensions. We analyze the physical

limitations of these conducting wires, as well as how such miniaturized

magnetic traps are affected by the nearby surface due to tunneling to the

surface, surface thermal noise, electron scattering within the wire, and the

Casimir-Polder force. We show that wires with cross sections as small as a few

tens of nanometers should enable robust operating conditions for coherent atom

optics (e.g. tunneling barriers for interferometry). In particular, trap sizes

on the order of the deBroglie wavelength become accessible, based solely on

static magnetic fields, thereby bringing the atomchip a step closer to

fulfilling its promise of a compact device for complex and accurate quantum

optics with ultracold atoms.

\\ ( http://arxiv.org/abs/0910.2598 , 356kb)

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\\

arXiv:0910.2610

Date: Wed, 14 Oct 2009 13:13:18 GMT (2072kb)

Title: Artificial Staggered Magnetic Field for Ultracold Atoms in Optical

Lattices

Authors: Lih-King Lim, Andreas Hemmerich, and C. Morais Smith

Categories: cond-mat.quant-gas cond-mat.supr-con

Comments: 14 pages, 5 figures

\\

We consider a time-dependent optical lattice with staggered particle current

in the tight-binding regime and show that it can be described by a

time-independent effective lattice model with an artificial staggered magnetic

field. The low energy description of a single-component fermion in this lattice

at half-filling is provided by two copies of ideal two-dimensional massless

Dirac fermions. The Dirac cones are generally anisotropic and can be tuned by

the external staggered flux $\p$. For bosons, the staggered flux modifies the

single-particle spectrum such that in the weak coupling limit, depending on the

flux $\p$, distinct superfluid phases are realized. We discuss their

properties, establish the nature of the phase transitions between them and use

Bogoliubov theory to determine their excitation spectra. Finally, we study the

generalized superfluid-Mott insulator transition in the presence of the

staggered flux and thus establish the complete phase diagram.

\\ ( http://arxiv.org/abs/0910.2610 , 2072kb)

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\\

arXiv:0910.2679

Date: Wed, 14 Oct 2009 17:55:58 GMT (50kb)

Title: Time evolution of a two-atom dressed entangled state in a cavity

Authors: E.R. Granhen, C.A. Linhares, A.P.C. Malbouisson, J.M.C. Malbouisson

Categories: quant-ph

Comments: 12 pages, 2 figures

\\

We study the time evolution of superposition of product states of two dressed

atoms in a spherical cavity in the extreme situations of an arbitrarily large

cavity (free space) and of a small one. In the large-cavity case, the system

dissipates, whereas, for the small finite cavity, the system evolves in an

oscillating way and never completely decays. We also compute the von Neumann

entropy for such a system, a measurement of the degree of entanglement of the

two atoms, as the superposed state evolves in time. We find that this entropy

does not depend on time, nor on the size of the cavity.

\\ ( http://arxiv.org/abs/0910.2679 , 50kb)

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\\

arXiv:0910.2693

Date: Wed, 14 Oct 2009 19:56:35 GMT (128kb)

Title: Universal Short-Distance Structure of the Single-Particle Spectral

Function of Dilute Fermi Gases

Authors: William Schneider, Mohit Randeria

Categories: cond-mat.quant-gas

Comments: 4 pages, 4 figures

\\

The universal $1/k4$ tail in the momentum distribution of dilute Fermi gases

implies that the spectral function $A(\kk,\omega)$ must have weight below the

chemical potential for large momentum $k \gg k_F$, with observable consequences

in RF spectroscopy experiments. We show that this incoherent spectral weight is

centered about $\omega \simeq - \epsilon(\kk)$ in a range of energies of order

$v_F k$. This "bending back" in the dispersion, while natural for superfluids,

is quite surprising for normal gases. We show that this universal structure is

present in the hard-sphere gas as well as the Fermi liquid ground state of the

highly imbalanced, attractive gas near unitarity. We argue that, even in the

BCS superfluid, this bending back at large $k$ is dominated by interaction

effects which do not reflect the pairing gap.

\\ ( http://arxiv.org/abs/0910.2693 , 128kb)

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\\

arXiv:0910.2711

Date: Wed, 14 Oct 2009 20:15:03 GMT (703kb)

Title: Reentrant stability of BEC standing wave patterns

Authors: Ryan M. Kalas, Dmitry Solenov, and Eddy Timmermans

Categories: cond-mat.quant-gas

Comments: 13 pages, 9 figures

\\

We describe standing wave patterns induced by an attractive finite-ranged

external potential inside a large Bose-Einstein Condensate (BEC). As the

potential depth increases, the time independent Gross-Pitaevskii equation

develops pairs of solutions that have nodes in their wavefunction. We elucidate

the nature of these states and study their dynamical stability. Although we

study the problem in a two-dimensional BEC subject to a cylindrically symmetric

square-well potential of a radius that is comparable to the coherence length of

the BEC, our analysis reveals general trends, valid in two and three

dimensions, independent of the symmetry of the localized potential well, and

suggestive of the behavior in general, short- and large-range potentials. One

set of nodal BEC wavefunctions resembles the single particle n node bound state

wavefunction of the potential well, the other wavefunctions resemble the n-1

node bound-state wavefunction with a kink state pinned by the potential. The

second state, though corresponding to the lower free energy value of the pair

of n node BEC states, is always unstable, whereas the first can be dynamically

stable in intervals of the potential well depth, implying that the standing

wave BEC can evolve from a dynamically unstable to stable, and back to unstable

status as the potential well is adiabatically deepened, a phenomenon that we

refer to as "reentrant dynamical stability".

\\ ( http://arxiv.org/abs/0910.2711 , 703kb)

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\\

arXiv:0910.2727

Date: Wed, 14 Oct 2009 20:43:39 GMT (483kb)

Title: Vortices in exciton-polariton condensates with polarization splitting

Authors: M. Toledo Solano, Yuri G. Rubo

Categories: cond-mat.mes-hall

Comments: 4 pages, 2 figs, Optics of Excitons in Confined Systems 11 (Madrid,

7-11 september 2009)

\\

The presence of polarization splitting of exciton-polariton branches in

planar semiconductor microcavities has a pronounced effect on vortices in

polariton condensates. We show that the TE-TM splitting leads to the coupling

between the left and right half-vortices (vortices in the right and left

circular components of the condensate), that otherwise do not interact. We

analyze also the effect of linear polarization pinning resulted from a fixed

splitting between two perpendicular linear polarizations. In this case,

half-vortices acquire strings (solitons) attached to them. The half-vortices

with strings can be detected by observing the interference fringes of light

emitted from the cavity in two circular polarizations. The string affects the

fringes in both polarizations. Namely, the half-vortex is characterized by an

asymmetric fork-like dislocation in one circular polarization; the fringes in

the other circular polarization are continuous, but they are shifted by

crossing the string.

\\ ( http://arxiv.org/abs/0910.2727 , 483kb)

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\\

arXiv:0910.2729

Date: Wed, 14 Oct 2009 20:50:50 GMT (761kb)

Title: Generation of vortices and observation of Quantum Turbulence in an

oscillating Bose-Einstein Condensate

Authors: E.A.L. Henn, J.A. Seman, G. Roati, K.M.F. Magalhaes, and V.S. Bagnato

Categories: cond-mat.quant-gas

Comments: to appear in JLTP - QFS 2009

\\

We report on the experimental observation of vortex formation and production

of tangled vortex distribution in an atomic BEC of Rb-87 atoms submitted to an

external oscillatory perturbation. The oscillatory perturbations start by

exciting quadrupolar and scissors modes of the condensate. Then regular

vortices are observed finally evolving to a vortex tangle configuration. The

vortex tangle is a signature of the presence of a turbulent regime in the

cloud. We also show that this turbulent cloud has suppression of the aspect

ratio inversion typically observed in quantum degenerate bosonic gases during

free expansion.

\\ ( http://arxiv.org/abs/0910.2729 , 761kb)

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\\

arXiv:0910.2775

Date: Thu, 15 Oct 2009 05:51:04 GMT (408kb)

Title: Stable Fractional Vortices in the Cyclic States of Bose-Einstein

Condensates

Authors: J. A. M. Huhtam\"aki, T. P. Simula, M. Kobayashi, and K. Machida

Categories: cond-mat.quant-gas

Comments: 5 pages, 2 figures

\\

We propose methods to create fractional vortices in the cyclic state of an F

= 2 spinor Bose-Einstein condensate by manipulating its internal spin structure

using pulsed microwave and laser fields. The stability of such vortices is

studied as a function of the rotation frequency of the confining harmonic trap

both in pancake and cigar shaped condensates. We find a range of parameters for

which the so-called 1/3-vortex state is energetically favorable. Such

fractional vortices could be created in condensates of 87Rb atoms using current

experimental techniques facilitating probing of topological defects with

non-Abelian statistics.

\\ ( http://arxiv.org/abs/0910.2775 , 408kb)

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\\

arXiv:0910.2791

Date: Thu, 15 Oct 2009 09:07:39 GMT (1090kb)

Title: A Soluble Model of Quantum Turbulence

Authors: Tzihong Chiueh, Tak-Pong Woo, Hung-Yu Jian and Hsi-Yu Schive

Categories: quant-ph

Comments: 9 pages, 14 figures

\\

Quantum turbulence with vortex creation and annihilation is demonstrated as a

solution of the time-dependent, free-particle Schroedinger equation with

large-scale random-phased initial conditions. It is shown that quantum vortex

is not frozen to the fluid, nor is its motion entirely induced by other

vortices via Biot-Savart law. Thus, quantum vortex is a wave phenomenon with a

distinct propagation speed. Relaxed quantum turbulence of 2D and 3D exhibits

universal scaling in the steady-state energy spectrum as $k^{-1}$, but no

evidence of Kolmogorov-type forward energy cascade in 3D or inverse energy

cascade in 2D is found. On the other hand, universal vortex-vortex two-point

correlation only exists in 3D, scaled as $\Delta r^{-2}$, where $\Delta r$ is

the separation between two vortex elements. Finally, we found that helical

short waves, the Kelvin waves, are commonly in presence at the 3D vortex core.

\\ ( http://arxiv.org/abs/0910.2791 , 1090kb)

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\\

arXiv:0910.2805

Date: Thu, 15 Oct 2009 08:51:08 GMT (915kb)

Title: Metastable quantum phase transitions in a periodic one-dimensional Bose

gas: II. Many-body theory

Authors: R. Kanamoto, L.D. Carr, M. Ueda

Categories: cond-mat.quant-gas

Comments: 14 pages, 10 figures

\\

We show that quantum solitons in the Lieb-Liniger Hamiltonian are precisely

the yrast states. We identify such solutions clearly with Lieb's type II

excitations from weak to strong interactions, clarifying a long-standing

question of the physical meaning of this excitation branch. We demonstrate that

the metastable quantum phase transition previously found in mean field analysis

of the weakly-interacting Lieb-Liniger Hamiltonian [Phys. Rev. A {\bf 79},

063616 (2009)] extends into the medium- to strongly-interacting regime of a

periodic one-dimensional Bose gas. Our methods are exact diagonalization,

finite-size Bethe ansatz, and the boson-fermion mapping in the Tonks-Girardeau

limit.

\\ ( http://arxiv.org/abs/0910.2805 , 915kb)

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\\

arXiv:0910.2834

Date: Thu, 15 Oct 2009 10:42:10 GMT (88kb)

Title: Energy Content of Quantum Systems and the Alleged Collapse of the

Wavefunction

Authors: Peter J. Riggs

Categories: quant-ph

Comments: 10 pages, no figures, also published in: Quantum Causality:

Conceptual Issues in the Causal Theory of Quantum Mechanics (Springer, 2009)

DOI: 10.1007/978-90-481-2403-9

\\

It is shown that within a quantum system, the wave field has a (potential)

energy content that can be exchanged with quantum particles. Energy

conservation in quantum systems holds if potential energy is correctly taken to

be a field attribute. From this perspective, a transfer of energy occurs on

measurement from the wave field to a quantum particle and this provides a

physical explanation of what is commonly referred to as the collapse of the

wavefunction.

\\ ( http://arxiv.org/abs/0910.2834 , 88kb)

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\\

arXiv:0910.2867

Date: Thu, 15 Oct 2009 13:13:49 GMT (22kb)

Title: Uncertainty relations of Statistical Mechanics

Authors: L. Velazquez and S. Curilef

Categories: cond-mat.stat-mech

Comments: Version accepted for publication in Mod. Phys. Lett. B

\\

Recently, we have presented some simple arguments supporting the existence of

certain complementarity between thermodynamic quantities of temperature and

energy, an idea suggested by Bohr and Heinsenberg in the early days of Quantum

Mechanics. Such a complementarity is expressed as the impossibility of perform

an exact simultaneous determination of the system energy and temperature by

using an experimental procedure based on the thermal equilibrium with other

system regarded as a measure apparatus (thermometer). In this work, we provide

a simple generalization of this latter approach with the consideration of a

thermodynamic situation with several control parameters.

\\ ( http://arxiv.org/abs/0910.2867 , 22kb)

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\\

arXiv:0910.2939

Date: Thu, 15 Oct 2009 17:08:35 GMT (11kb)

Title: Approaches in evaluating two-time correlation function

Authors: Sintayehu Tesfa

Categories: quant-ph

Comments: 7 pages, no figure

\\

Derivation of the procedures that can be applied in evaluating two-time

correlation function in terms of coherent-state propagator and corresponding

Q-function is presented. On the basis that the involved functions are generally

exponential in nature, obtaining the two-time second-order correlation function

is essentially claimed to be reduced to carrying out relatively simple

integrations. Fundamentally, the time dependence of the operators is

transferred to the density operator. Moreover, manipulation in reordering the

operators is performed by applying the usual trace operation. With all details,

it is basically observed that the two-time correlation can be readily

determined once the pertinent coherent-state propagator or Q-function is known.

Since working with c-number equation is far more handy than the associated

operator equation, it is expected that the results derived in this contribution

can aid in easing the otherwise involving mathematical rigor.

\\ ( http://arxiv.org/abs/0910.2939 , 11kb)

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\\

arXiv:0910.2978

Date: Thu, 15 Oct 2009 19:35:58 GMT (527kb)

Date (revised v2): Thu, 15 Oct 2009 21:33:06 GMT (243kb)

Title: Higher order coherence of exciton-polariton condensates

Authors: Tomoyuki Horikiri, Paolo Schwendimann, Antonio Quattropani, Sven

Hofling, Alfred Forchel, Yoshihisa Yamamoto

Categories: cond-mat.mes-hall cond-mat.other

Comments: 4 pages, 4 figures

\\

The second and third order coherence functions $g^{(n)}(0) (n=2 {\rm and} 3)$

of an exciton-polariton condensate is measured and compared to the theory.

Contrary to an ideal photon laser, deviation from unity in the second and third

order coherence functions is observed, thus showing a bunching effect, but not

the characteristics of a standard thermal state with $g^{(n)}(0)=n!$. The

increase of bunching with the order of the coherence function, $g^{(3)}(0) >

g^{(2)}(0)>1$, indicates that the polariton condensate is different from

coherent state, number state and thermal state. The experimental results are in

agreement with the theoretical model where polariton-polariton and

polariton-phonon interactions are responsible for the loss of temporal

coherence.

\\ ( http://arxiv.org/abs/0910.2978 , 243kb)

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The replacements:

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\\

arXiv:0809.1818 (*cross-listing*)

replaced with revised version Wed, 14 Oct 2009 15:15:24 GMT (36kb)

Title: The giant vortex state for a Bose-Einstein condensate in a rotating

anharmonic trap : extreme rotation regimes

Authors: Nicolas Rougerie

Categories: math-ph cond-mat.other math.MP

Comments: 44 pages, new results added, proofs corrected, title changed

MSC-class: 35Q55,47J30,76M23

\\ ( http://arxiv.org/abs/0809.1818 , 36kb)

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\\

arXiv:0811.2845

replaced with revised version Sun, 11 Oct 2009 03:09:51 GMT (660kb)

Title: Magnetic order, Bose-Einstein condensation, and superfluidity in a

bosonic t-J model of CP^1 spinons and doped Higgs holons

Authors: Koji Aoki, Kazuhiko Sakakibara, Ikuo Ichinose, Tetsuo Matsui

Categories: cond-mat.str-el cond-mat.supr-con

Comments: Title changed, Corected typos. 14 pages, 17 figures

Journal-ref: Physical Review B 80 (2009) 144510

DOI: 10.1103/PhysRevB.80.144510

\\ ( http://arxiv.org/abs/0811.2845 , 660kb)

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\\

arXiv:0901.1763

replaced with revised version Wed, 14 Oct 2009 13:10:48 GMT (2295kb)

Title: Spinor condensate of $^{87}$Rb as a dipolar gas

Authors: Tomasz \'Swis{\l}ocki, Miros{\l}aw Brewczyk, Mariusz Gajda, Kazimierz

Rz\k{a}\.zewski

Categories: cond-mat.other

\\ ( http://arxiv.org/abs/0901.1763 , 2295kb)

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\\

arXiv:0902.4119

replaced with revised version Tue, 13 Oct 2009 08:06:59 GMT (36kb)

Title: Multiple condensed phases in attractively interacting Bose systems

Authors: M. M\"annel, K. Morawetz, P. Lipavsk\'y

Categories: cond-mat.stat-mech nucl-th

\\ ( http://arxiv.org/abs/0902.4119 , 36kb)

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\\

arXiv:0903.4823

replaced with revised version Thu, 8 Oct 2009 22:52:00 GMT (1550kb)

Title: Quantum transport through a Tonks-Girardeau gas

Authors: Stefan Palzer, Christoph Zipkes, Carlo Sias, and Michael K\"ohl

Categories: cond-mat.mes-hall cond-mat.quant-gas

Journal-ref: Phys. Rev. Lett. 103, 150601 (2009)

DOI: 10.1103/PhysRevLett.103.150601

\\ ( http://arxiv.org/abs/0903.4823 , 1550kb)

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\\

arXiv:0903.4837

replaced with revised version Tue, 13 Oct 2009 14:31:04 GMT (960kb,D)

Title: Experimental demonstration of single-site addressability in a

two-dimensional optical lattice

Authors: Peter W\"urtz, Tim Langen, Tatjana Gericke, Andreas Koglbauer, Herwig

Ott

Categories: cond-mat.other quant-ph

Comments: 4 pages, 5 figures

Journal-ref: Phys. Rev. Lett. 103, 080404 (2009)

DOI: 10.1103/PhysRevLett.103.080404

\\ ( http://arxiv.org/abs/0903.4837 , 960kb)

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\\

arXiv:0903.5016

replaced with revised version Wed, 14 Oct 2009 19:01:48 GMT (1564kb)

Title: Pulsating and persistent vector solitons in a Bose-Einstein condensate

in a lattice upon phase separation instability

Authors: Uttam Shrestha, Juha Javanainen, and Janne Ruostekoski

Categories: cond-mat.other cond-mat.quant-gas nlin.PS quant-ph

Comments: submitted to PRL

\\ ( http://arxiv.org/abs/0903.5016 , 1564kb)

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\\

arXiv:0904.0418

replaced with revised version Fri, 9 Oct 2009 02:18:34 GMT (218kb,D)

Title: Quantum Darwinism in a hazy environment

Authors: Michael Zwolak, H. T. Quan, Wojciech H. Zurek

Categories: quant-ph

Comments: 4 pages, 3 figures

Report-no: LAUR-09-01899

Journal-ref: Phys. Rev. Lett. 103, 110402 (2009)

DOI: 10.1103/PhysRevLett.103.110402

\\ ( http://arxiv.org/abs/0904.0418 , 218kb)

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\\

arXiv:0904.2409

replaced with revised version Fri, 9 Oct 2009 00:57:30 GMT (390kb)

Title: Critical velocity of a clean one-dimensional superconductor

Authors: Tzu-Chieh Wei (University of Waterloo) and Paul M. Goldbart

(University of Illinois at Urbana-Champaign)

Categories: cond-mat.supr-con

Comments: Single column, double space, 24 pages, 10 figures

Journal-ref: Phys. Rev. B 80, 134507 (2009)

DOI: 10.1103/PhysRevB.80.134507

\\ ( http://arxiv.org/abs/0904.2409 , 390kb)

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\\

arXiv:0905.3533

replaced with revised version Mon, 12 Oct 2009 17:58:46 GMT (10kb)

Title: Horizon in Random Matrix Theory, Hawking Radiation and Flow of Cold

Atoms

Authors: Fabio Franchini, Vladimir E. Kravtsov

Categories: cond-mat.str-el cond-mat.mes-hall gr-qc quant-ph

Comments: 4 pages, no figures. PRL accepted version

Journal-ref: Phys. Rev. Lett. 103, 166401 (2009)

\\ ( http://arxiv.org/abs/0905.3533 , 10kb)

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\\

arXiv:0905.4783

replaced with revised version Tue, 13 Oct 2009 07:26:37 GMT (108kb)

Title: Critical temperature of a Bose gas in an optical lattice

Authors: D. Baillie and P. B. Blakie

Categories: cond-mat.quant-gas

Comments: 4 pages, 4 figures

Journal-ref: Phys. Rev. A (80), 031603(R) (2009)

DOI: 10.1103/PhysRevA.80.031603

\\ ( http://arxiv.org/abs/0905.4783 , 108kb)

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\\

arXiv:0906.2314

replaced with revised version Sat, 10 Oct 2009 08:41:15 GMT (235kb)

Title: Decay of superfluid currents in the interacting one-dimensional Bose gas

Authors: Alexander Yu. Cherny, Jean-Sebastien Caux, and Joachim Brand

Categories: cond-mat.quant-gas cond-mat.stat-mech

Comments: 5 pages, 4 figures

Journal-ref: Phys. Rev. A 80, 043604 (2009)

DOI: 10.1103/PhysRevA.80.043604

\\ ( http://arxiv.org/abs/0906.2314 , 235kb)

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\\

arXiv:0906.4606

replaced with revised version Tue, 13 Oct 2009 10:04:23 GMT (588kb)

Title: Finite temperature theory of superfluid bosons in optical lattices

Authors: D. Baillie and P. B. Blakie

Categories: cond-mat.quant-gas

Comments: 22 pages, 18 figures, reorganized appendices, moved figures,

corrected typos

Journal-ref: Phys. Rev. A (80), 033620 (2009)

DOI: 10.1103/PhysRevA.80.033620

\\ ( http://arxiv.org/abs/0906.4606 , 588kb)

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\\

arXiv:0906.4731

replaced with revised version Tue, 13 Oct 2009 17:21:49 GMT (56kb)

Title: Observation of universality in ultracold 7Li three-body recombination

Authors: Noam Gross, Zav Shotan, Servaas Kokkelmans and Lev Khaykovich

Categories: cond-mat.other

Comments: 5 pages, 2 figures

Journal-ref: Phys. Rev. Lett. 103, 163202 (2009)

DOI: 10.1103/PhysRevLett.103.163202

\\ ( http://arxiv.org/abs/0906.4731 , 56kb)

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\\

arXiv:0907.0267

replaced with revised version Thu, 15 Oct 2009 16:26:43 GMT (401kb)

Title: Universal Dephasing of Many-Body Rabi Oscillations of Atoms in

One-Dimensional Traps

Authors: Sebastian D. Huber and Ehud Altman

Categories: cond-mat.quant-gas cond-mat.str-el

Comments: 4 pages, 2 figures

Journal-ref: Phys. Rev. Lett. 103, 160402 (2009)

DOI: 10.1103/PhysRevLett.103.160402

\\ ( http://arxiv.org/abs/0907.0267 , 401kb)

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\\

arXiv:0907.1434 (*cross-listing*)

replaced with revised version Wed, 14 Oct 2009 09:47:47 GMT (62kb)

Title: Holographic dual of Cold Trapped Fermions

Authors: Sang-Jin Sin and Ismail Zahed

Categories: hep-th cond-mat.str-el

Comments: 22 page latex, v2:reference added, sec.7's title change. v3) c_V

recalculated

\\ ( http://arxiv.org/abs/0907.1434 , 62kb)

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\\

arXiv:0907.3080

replaced with revised version Sat, 10 Oct 2009 06:12:32 GMT (37kb)

Title: Stable Topological Superfluid Phase of Ultracold Polar Fermionic

Molecules

Authors: N. R. Cooper and G. V. Shlyapnikov

Categories: cond-mat.quant-gas cond-mat.str-el

Journal-ref: Phys. Rev. Lett. 103, 155302 (2009)

DOI: 10.1103/PhysRevLett.103.155302

\\ ( http://arxiv.org/abs/0907.3080 , 37kb)

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\\

arXiv:0907.5523

replaced with revised version Wed, 14 Oct 2009 15:39:07 GMT (53kb,D)

Title: Atom-dimer scattering and long-lived trimers in fermionic mixtures

Authors: J. Levinsen, T. G. Tiecke, J. T. M. Walraven, D. S. Petrov

Categories: cond-mat.quant-gas cond-mat.other

Comments: 4 pages, 2 figures, published version

Journal-ref: Phys. Rev. Lett. 103, 153202 (2009)

\\ ( http://arxiv.org/abs/0907.5523 , 53kb)

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arXiv:0909.5553

replaced with revised version Sat, 10 Oct 2009 07:21:32 GMT (13kb)

Title: Off-diagonal Long-Range Order and Supersolidity in a Quantum Solid with

Vacancies

Authors: Yu Shi, Yin Yang, Shao-Ming Fei

Categories: cond-mat.other

Comments: 12 pages. A few references are added. To appear in PRB

\\ ( http://arxiv.org/abs/0909.5553 , 13kb)

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arXiv:0910.0247

replaced with revised version Thu, 15 Oct 2009 17:39:28 GMT (75kb)

Title: Theory of Magnetic Field-Induced Bose-Einstein Condensation of Triplons

in Ba3Cr2O8

Authors: Tyler Dodds, Bohm-Jung Yang, and Yong Baek Kim

Categories: cond-mat.str-el

Comments: 10 pages, 13 figures. Corrected typo; references added

\\ ( http://arxiv.org/abs/0910.0247 , 75kb)

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Till next time,

Matt.

-- ========================================================================= Dr M. J. Davis, Associate Professor in Physics School of Mathematics and Physics, ph : +61 7 334 69824 The University of Queensland, fax : +61 7 336 51242 Brisbane, QLD 4072, mdavis_at_physics.uq.edu.au Australia. www.physics.uq.edu.au/people/mdavis/ ========================================================================= Matt's arXiv selection: weekly summary of cold-atom papers from arXiv.org http://www.physics.uq.edu.au/people/mdavis/matts_arXiv/ ========================================================================= Legal stuff: Unless stated otherwise, this e-mail represents only the views of the sender and not the views of the University of Queensland ========================================================================= _______________________________________________ Matts-arxiv mailing list Matts-arxiv_at_lists.sps.uq.edu.auReceived on Fri Jan 29 2010 - 14:08:52 EST

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