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

Date: Wed, 12 May 2010 16:03:52 +1000

Date: Wed, 12 May 2010 16:03:52 +1000

Dear subscribers,

This email has been a long time coming for many different reasons generally

involving busy-ness. However, because I haven't been sending these emails I

haven't been keeping up to date with the literature, and this is Not A Good

Thing for me, let along anyone else.

I have decided to skip (for now at least) all the weeks that have been missed,

and start afresh. If you actually read this, I would appreciate hearing your

opinion if it is actually useful receiving these messages (and also if it is

worth going through the backlog). Feedback will give me extra motivation to

keep going and implement a more organised system to stay up-to-date.

This week's selection contains 41 new abstracts and 7 replacements.

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arXiv:1004.4978 (*cross-listing*)

Date: Wed, 28 Apr 2010 09:02:42 GMT (37kb)

Title: Dynamics of atoms in a time-orbiting-potential trap: consequences of the

classical description

Authors: Bruno Zambon (1), Roberto Franzosi(2) ((1) University of Pisa, Italy,

(2) C.N.I.S.M. and University of Florence, Italy)

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

Comments: 24 pages, 5 figures, regular article

Journal-ref: J. Phys. B: At. Mol. Opt. Phys. 43, 085302 (2010)

\\

The classical model that describes the motion of an atom in a magnetic trap

is solved in order to investigate the relationship between the failure of the

usual adiabatic approximation assumption and the physical parameters of the

trap. This allows to evaluate the effect that reversing of the bias field

rotation produces on the vertical position of the atomic orbit, a displacement

that is closely related to the adiabatic character of the trap motion. The

present investigation has been motivated by a similar experimental test

previously carried out in the actual magnetic time orbiting potential trap. We

find that the non-adiabatic effects provided by the classical model are

extremely small. Thus, we conclude that the theoretical explanation of the

experimental measures, requires a quantum description of the dynamics in

magnetic traps.

\\ ( http://arxiv.org/abs/1004.4978 , 37kb)

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arXiv:1004.5390

Date: Thu, 29 Apr 2010 20:18:07 GMT (440kb)

Title: S-matrix approach to quantum gases in the unitary limit II: the

three-dimensional case

Authors: Pye-Ton How and Andr\'e LeClair

Categories: cond-mat.quant-gas hep-th math-ph math.MP

Comments: 26 pages, 16 figures

\\

A new analytic treatment of three-dimensional homogeneous Bose and Fermi

gases in the unitary limit of negative infinite scattering length is presented,

based on the S-matrix approach to statistical mechanics we recently developed.

The unitary limit occurs at a fixed point of the renormalization group with

dynamical exponent z=2 where the S-matrix equals -1. For fermions we find T_c

/T_F is approximately 0.1. For bosons we present evidence that the gas does not

collapse, but rather has a critical point that is a strongly interacting form

of Bose-Einstein condensation. This bosonic critical point occurs at n lambda^3

approximately 1.3 where n is the density and lambda the thermal wavelength,

which is lower than the ideal gas value of 2.61.

\\ ( http://arxiv.org/abs/1004.5390 , 440kb)

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arXiv:1004.5420 (*cross-listing*)

Date: Thu, 29 Apr 2010 23:18:56 GMT (430kb,D)

Title: Universal rates for reactive ultracold polar molecules in reduced

dimensions

Authors: Andrea Micheli, Zbigniew Idziaszek, Guido Pupillo, Mikhail A. Baranov,

Peter Zoller, and Paul S. Julienne

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

Comments: 4 pages, 3 figures

\\

Analytic expressions describe universal elastic and reactive rates of

quasi-two-dimensional and quasi-one-dimensional collisions of highly reactive

ultracold molecules interacting by a van der Waals potential. Exact and

approximate calculations for the example species of KRb show that stability and

evaporative cooling can be realized for spin-polarized fermions at moderate

dipole and trapping strength, whereas bosons or unlike fermions require

significantly higher dipole or trapping strengths.

\\ ( http://arxiv.org/abs/1004.5420 , 430kb)

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arXiv:1004.5443

Date: Fri, 30 Apr 2010 03:22:54 GMT (97kb)

Title: Mean-field study of itinerant ferromagnetism in trapped ultracold Fermi

gases: Beyond the local density approximation

Authors: H Dong, Hui Hu, Xia-Ji Liu, and Peter D. Drummond

Categories: cond-mat.quant-gas

Comments: 7 pages, 5 figures;

\\

We theoretically investigate the itinerant ferromagnetic transition of a

spherically trapped ultracold Fermi gas with spin imbalance under strongly

repulsive interatomic interactions. Our study is based on a self-consistent

solution of the Hartree-Fock mean-field equations beyond the widely used local

density approximation. We demonstrate that, while the local density

approximation holds in the paramagnetic phase, after the ferromagnetic

transition it leads to a quantitative discrepancy in various thermodynamic

quantities even with large atom numbers. We determine the position of the phase

transition by monitoring the shape change of the free energy curve with

increasing the polarization at various interaction strengths.

\\ ( http://arxiv.org/abs/1004.5443 , 97kb)

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arXiv:1004.5458

Date: Fri, 30 Apr 2010 07:33:30 GMT (1790kb)

Title: Quantized vortices in superfluid helium and atomic Bose-Einstein

condensates

Authors: Makoto Tsubota, Kenichi Kasamatsu, Michikazu Kobayashi

Categories: cond-mat.quant-gas

Comments: 99 pages, 20 figures, Review article

\\

This article reviews recent developments in the physics of quantized vortices

in superfluid helium and atomic Bose-Einstein condensates. Quantized vortices

appear in low-temperature quantum condensed systems as the direct product of

Bose-Einstein condensation. Quantized vortices were first discovered in

superfluid 4He in the 1950s, and have since been studied with a primary focus

on the quantum hydrodynamics of this system. Since the discovery of superfluid

3He in 1972, quantized vortices characteristic of the anisotropic superfluid

have been studied theoretically and observed experimentally using rotating

cryostats. The realization of atomic Bose-Einstein condensation in 1995 has

opened new possibilities, because it became possible to control and directly

visualize condensates and quantized vortices. Historically, many ideas

developed in superfluid 4He and 3He have been imported to the field of cold

atoms and utilized effectively. Here, we review and summarize our current

understanding of quantized vortices, bridging superfluid helium and atomic

Bose-Einstein condensates. This review article begins with a basic

introduction, which is followed by discussion of modern topics such as quantum

turbulence and vortices in unusual cold atom condensates.

\\ ( http://arxiv.org/abs/1004.5458 , 1790kb)

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arXiv:1004.5471

Date: Fri, 30 Apr 2010 08:40:45 GMT (242kb)

Title: Exciton condensation and fractional charge in a bilayer two-dimension

electron gas adjacent to a superconductor film

Authors: Ningning Hao, Ping Zhang, Jian Li, Wei Zhang, Yupeng Wang

Categories: cond-mat.mes-hall

Comments: 4.6 pages, 3 figures

\\

We study the exciton condensate (EC) in a bilayer two-dimension-electron-gas

(2DEG) adjacent to a type-II superconductor thin film with an array of pinned

vortex lattices. By applying continuum low energy theory and carrying numerical

simulations of lattice model within mean-field approximation, we find that if

the order parameter of EC has a vortex profile, there are exact zero modes and

associated \emph{rational} fractional charge for zero pseudospin potential

($\mu$) and average chemical potential ($h$): $\mu$=0 and $h$=0; while for

$\mu\mathtt{\neq}0$ and $h$=0, intervalley mixing splits the zero energy

levels, and the system exhibits \emph{irrational} fractional \emph{axial}

charge.

\\ ( http://arxiv.org/abs/1004.5471 , 242kb)

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arXiv:1004.5480

Date: Fri, 30 Apr 2010 09:22:59 GMT (10kb)

Title: Microcanonical Entropy and Dynamical Measure of Temperature for Systems

with Two First Integrals

Authors: Roberto Franzosi (C.N.I.S.M. and University of Florence, Italy)

Categories: cond-mat.stat-mech math-ph math.MP nlin.CD

Comments: 4 pages, preprint

\\

We consider a generic classical many particle system described by an

autonomous Hamiltonian $H(x^{_1},...,x^{_{N+2}})$ which, in addition, has a

conserved quantity $V(x^{_1},...,x^{_{N+2}})=v$, so that the Poisson bracket

$\{H,V \}$ vanishes. We derive in detail the microcanonical expressions for

entropy and temperature. We show that both of these quantities depend on

multidimensional integrals over submanifolds given by the intersection of the

constant energy hypersurfaces with those defined by

$V(x^{_1},...,x^{_{N+2}})=v$. We show that temperature and higher order

derivatives of entropy are microcanonical observable that, under the hypothesis

of ergodicity, can be calculated as time averages of suitable functions. We

derive the explicit expression of the function that gives the temperature.

\\ ( http://arxiv.org/abs/1004.5480 , 10kb)

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arXiv:1004.5486

Date: Fri, 30 Apr 2010 10:01:48 GMT (76kb)

Title: Ultrasensitive Atomic clock with single-mode number-squeezing

Authors: L. Pezze and A. Smerzi

Categories: quant-ph

Comments: 4 pages, 2 figures

\\

We show that the sensitivity of an atomic clock can be enhanced below the

shot-noise level by initially squeezing, and then measuring in output, the

population of a single atomic level. This can simplify current experimental

protocols which requires squeezing of the relative number of particles of the

two populated states. We finally study, as a specific application, the clock

sensitivity obtained with a single mode quantum non-demolition measurement.

\\ ( http://arxiv.org/abs/1004.5486 , 76kb)

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arXiv:1004.5531

Date: Fri, 30 Apr 2010 13:48:45 GMT (14kb)

Title: Superfluid-Insulator Transitions in Attractive Bose-Hubbard Model with

Three-Body Constraint

Authors: Yu-Wen Lee and Min-Fong Yang

Categories: cond-mat.quant-gas

Comments: 4 pages, 2 figures

\\

By means of the method of the effective potential, the phase transitions from

the Mott insulating state to either the atomic or the dimer superfluid state in

the three-body constrained attractive Bose lattice gas are analyzed. Due to the

appearance of the Feshbach resonance coupling between the two kinds of order

parameters in the derived effective potential function, it is found that the

continuous Mott insulator-to-superfluid transitions can be preempted by

first-order ones. Since the employed approach can provide accurate predictions

of phase boundaries in the strong coupling limit, where the dimer superfluid

phase can emerge, our work hence sheds light on the search of this novel phase

in real ultracold Bose gases in optical lattices.

\\ ( http://arxiv.org/abs/1004.5531 , 14kb)

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arXiv:1004.5567

Date: Fri, 30 Apr 2010 16:15:17 GMT (60kb)

Title: Einstein's quantum theory of the monatomic ideal gas: non-statistical

arguments for a new statistics

Authors: Enric P\'erez, Tilman Sauer

Categories: physics.hist-ph

Comments: 57 pp.

\\

In this article, we analyze the third of three papers, in which Einstein

presented his quantum theory of the ideal gas of 1924-1925. Although it failed

to attract the attention of Einstein's contemporaries and although also today

very few commentators refer to it, we argue for its significance in the context

of Einstein's quantum researches. It contains an attempt to extend and exhaust

the characterization of the monatomic ideal gas without appealing to

combinatorics. Its ambiguities illustrate Einstein's confusion with his initial

success in extending Bose's results and in realizing the consequences of what

later became to be called Bose-Einstein statistics. We discuss Einstein's

motivation for writing a non-combinatorial paper, partly in response to

criticism by his friend Ehrenfest, and we paraphrase its content. Its arguments

are based on Einstein's belief in the complete analogy between the

thermodynamics of light quanta and of material particles and invoke

considerations of adiabatic transformations as well as of dimensional analysis.

These techniques were well-known to Einstein from earlier work on Wien's

displacement law, Planck's radiation theory, and the specific heat of solids.

We also investigate the possible role of Ehrenfest in the gestation of the

theory.

\\ ( http://arxiv.org/abs/1004.5567 , 60kb)

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arXiv:1004.5577

Date: Fri, 30 Apr 2010 17:15:36 GMT (93kb)

Title: Candidate theories to explain the anomalous spectroscopic signatures of

atomic H in molecular H$_2$ crystals

Authors: Kaden R. A. Hazzard and Erich J. Mueller

Categories: cond-mat.other cond-mat.dis-nn

Comments: 7 pages, 2 figures

\\

We analyze a number of proposed explanations for spectroscopic anomalies

observed in atomic hydrogen defects embedded in a solid molecular hydrogen

matrix. In particular, we critically evaluate the possibility that these

anomalies are related to Bose-Einstein condensation (both global and local).

For each proposed mechanism we discuss which aspects of the experiment can be

explained, and make predictions for future experiments.

\\ ( http://arxiv.org/abs/1004.5577 , 93kb)

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arXiv:1004.5595

Date: Fri, 30 Apr 2010 19:21:17 GMT (203kb)

Title: The devil's staircase in 1-dimensional dipolar Bose gases in optical

lattices

Authors: F. J. Burnell and S. L. Sondhi

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

Comments: Chapter of doctoral thesis `On Exotic Orders in Strongly Correlated

Systems' (Princeton University, 09/09). This presents a more detailed version

of [PRB 80: 174519 (2009)] (arXiv:0901.4366)

\\

We consider a single-component gas of dipolar bosons confined in a

one-dimensional optical lattice, where the dipoles are aligned such that the

long-ranged dipolar interactions are maximally repulsive. In the limit of zero

inter-site hopping and sufficiently large on-site interaction, the phase

diagram is a complete devil's staircase for filling fractions between 0 and 1:

every commensurate state at a rational filling is stable over a finite interval

in chemical potential, and for every chemical potential the system is in a

gapped commensurate phase. We perturb away from this limit in two

experimentally motivated directions involving the addition of hopping and a

reduction of the onsite interaction. The addition of hopping alone yields a

phase diagram, which we compute in perturbation theory in the hopping, where

the commensurate Mott phases now compete with the superfluid. We capture the

physics of the Mott-superfluid phase transitions via bosonization. In a finite

trap, we argue using an LDA and simulated annealing that this results in

regions of commensurate states separated by patches with dominant superfluid

correlations. Further softening of the onsite interaction yields alternative

commensurate states with double occupancies which can form a devil's staircase

of their own; we describe these states and discuss the possible transitions

between them. Adding a hopping term in this case produces one-dimensional

"supersolids" which simultaneously exhibit discrete broken symmetries and

superfluidity. The contents of this work was first published as a chapter in

the doctoral thesis `On Exotic Orders in Strongly Correlated Systems'

(Princeton University, 09/09, supervised by S. L. Sondhi), and constitutes a

considerably more detailed version of [PRB 80: 174519 (2009)].

\\ ( http://arxiv.org/abs/1004.5595 , 203kb)

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arXiv:1005.0067

Date: Sat, 1 May 2010 13:11:05 GMT (679kb,D)

Title: Fiber Fabry-Perot cavity with high finesse

Authors: David Hunger, Tilo Steinmetz, Yves Colombe, Christian Deutsch, Theodor

W. H\"ansch, Jakob Reichel

Categories: physics.optics quant-ph

Comments: Submitted to New J. Phys.

\\

We have realized a fiber-based Fabry-Perot cavity with CO2 laser-machined

mirrors. It combines very small size, high finesse F>=130000, small waist and

mode volume, and good mode matching between the fiber and cavity modes. This

combination of features is a major advance for cavity quantum electrodynamics

(CQED), as shown in recent CQED experiments with Bose-Einstein condensates

enabled by this cavity [Y. Colombe et al., Nature 450, 272 (2007)]. It should

also be suitable for a wide range of other applications, including coupling to

solid-state emitters, gas detection at the single-particle level, fiber-coupled

single-photon sources and high-resolution optical filters with large stopband.

\\ ( http://arxiv.org/abs/1005.0067 , 679kb)

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arXiv:1005.0093

Date: Sat, 1 May 2010 17:24:19 GMT (761kb)

Title: Mechanism of Tunneling in Interacting Open Ultracold Few-Boson Systems

Authors: Axel U. J. Lode, Alexej I. Streltsov, Ofir E. Alon, and Lorenz S.

Cederbaum

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

Comments: 11 pages, 3 figures

\\

We investigate the mechanism in the tunneling dynamics of open ultracold

few-boson systems by numerically solving the time-dependent few-boson

Schr\"{o}dinger equation exactly. By starting from a weakly repulsive,

initially coherent two-boson system we demonstrate that the decay dynamics

incorporate fragmentation. The wavefunction of the tunneling state exhibits a

pronounced dynamically-stable pattern which we explain by an analytical model.

By studying more bosons and stronger interactions we arrive to the conclusion

that the decay by tunneling is not a coherent process and exhibits a wealth of

phenomena depending on the interaction between the particles.

\\ ( http://arxiv.org/abs/1005.0093 , 761kb)

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arXiv:1005.0131 (*cross-listing*)

Date: Sun, 2 May 2010 09:40:36 GMT (9kb)

Title: The quantum vacuum at the foundations of classical electrodynamics

Authors: G. Leuchs (1 and 2), A. S. Villar (1 and 2), L. L. S\'anchez-Soto (1

and 3) ((1) Max Planck Institut fuer die Physik des Lichts, Germany, (2)

Institut fuer Optik, Information und Photonik, Universitaet

Erlangen-Nuernberg, Germany, (3) Departamento de \'Optica, Facultad de

F\'isica, Universidad Complutense, Spain)

Categories: quant-ph physics.class-ph

Comments: Comments on our manuscript are very welcome.

\\

In the classical theory of electromagnetism, the permittivity and the

permeability of free space are constants whose magnitudes do not seem to

possess any deeper physical meaning. By replacing the free space of classical

physics with the quantum notion of the vacuum, we speculate that the values of

the aforementioned constants could arise from the polarization and

magnetization of virtual pairs in vacuum. A classical dispersion model with

parameters determined by quantum and particle physics is employed to estimate

their values. We find the correct orders of magnitude. Additionally, our simple

assumptions yield an independent estimate for the number of charged elementary

particles based on the known values of the permittivity and the permeability,

and for the volume of a virtual pair. Such interpretation would provide an

intriguing connection between the celebrated theory of classical

electromagnetism and the quantum theory in the weak field limit.

\\ ( http://arxiv.org/abs/1005.0131 , 9kb)

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arXiv:1005.0137

Date: Sun, 2 May 2010 11:42:05 GMT (1441kb,D)

Title: Many-body phenomena in QED-cavity arrays

Authors: Andrea Tomadin and Rosario Fazio

Categories: cond-mat.str-el

Comments: 8 pages, 3 figures

Journal-ref: J. Opt. Soc. Am. B 27, A130 (2010)

DOI: 10.1364/JOSAB.27.00A130

\\

Coupled quantum electrodynamics (QED) cavities have been recently proposed as

new systems to simulate a variety of equilibrium and non-equilibrium many-body

phenomena. We present a brief review of their main properties together with a

survey of the last developments of the field and some perspectives concerning

their experimental realizations and possible new theoretical directions.

\\ ( http://arxiv.org/abs/1005.0137 , 1441kb)

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arXiv:1005.0215

Date: Mon, 3 May 2010 07:45:14 GMT (4044kb,D)

Title: Rubidium dimers in paraffin-coated cells

Authors: V. M. Acosta, A. Jarmola, D. Windes, E. Corsini, M. P. Ledbetter, T.

Karaulanov, M. Auzinsh, S. A. Rangwala, D. F. Jackson Kimball, and D. Budker

Categories: physics.atom-ph

Comments: 5 pages, 2 figures

\\

Measurements were made to determine the density of rubidium dimer vapor in

paraffin-coated cells. The number density of dimers and atoms in similar

paraffin-coated and uncoated cells was measured by optical spectroscopy. Due to

the relatively low melting point of paraffin, a limited temperature range of

43-80 deg C was explored, with the lower end corresponding to a dimer density

of less than 10^7 cm^(-3). With one-minute integration time, a sensitivity to

dimer number density of better than 10^6 cm^(-3) was achieved. No significant

difference in dimer density was observed between the cells.

\\ ( http://arxiv.org/abs/1005.0215 , 4044kb)

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arXiv:1005.0302

Date: Mon, 3 May 2010 14:08:46 GMT (691kb,D)

Title: Local observation of antibunching in a trapped Fermi gas

Authors: Torben Mueller, Bruno Zimmermann, Jakob Meineke, Jean-Philippe

Brantut, Tilman Esslinger, Henning Moritz

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

Comments: 5 pages, 4 figures

\\

Local density fluctuations and density profiles of a Fermi gas are measured

in-situ and analyzed. In the quantum degenerate regime, the weakly interacting

$^6$Li gas shows a suppression of the density fluctuations compared to the

non-degenerate case, where atomic shot noise is observed. This manifestation of

antibunching is a direct result of the Pauli principle and constitutes a local

probe of quantum degeneracy. We analyze our data using the predictions of the

fluctuation-dissipation theorem and the local density approximation,

demonstrating a fluctuation-based temperature measurement.

\\ ( http://arxiv.org/abs/1005.0302 , 691kb)

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arXiv:1005.0357

Date: Mon, 3 May 2010 17:54:21 GMT (513kb)

Title: Comparison between two mobile absolute gravimeters: optical versus

atomic interferometers

Authors: S. Merlet, Q. Bodart, N. Malossi, A. Landragin, F. Pereira Dos Santos,

O. Gitlein, L. Timmen

Categories: physics.atom-ph physics.geo-ph

\\

We report a comparison between two absolute gravimeters: the LNE-SYRTE cold

atoms gravimeter and FG5#220 of Leibniz Universit\"at of Hannover. They rely on

different principles of operation: atomic and optical interferometry. Both are

movable which enabled them to participated to the last International Comparison

of Absolute Gravimeters (ICAG'09) at BIPM. Immediately after, their bilateral

comparison took place in the LNE watt balance laboratory and showed an

agreement of 4.3 +/- 6.4 {\mu}Gal.

\\ ( http://arxiv.org/abs/1005.0357 , 513kb)

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arXiv:1005.0393

Date: Mon, 3 May 2010 20:11:00 GMT (5810kb)

Title: Introduction to Nonequilibrium Statistical Mechanics with Quantum Field

Authors: Takafumi Kita

Categories: cond-mat.stat-mech hep-ph math-ph math.MP nucl-th

Comments: 78 pages, 14 figures, invited paper (free access) of Prog. Theor.

Phys. http://ptp.ipap.jp/link?PTP/123/581/

Journal-ref: Prog. Theor. Phys. 123 (2010) 581-658

DOI: 10.1143/PTP.123.581

\\

In this article, we present a concise and self-contained introduction to

nonequilibrium statistical mechanics with quantum field theory by considering

an ensemble of interacting identical bosons or fermions as an example. Readers

are assumed to be familiar with the Matsubara formalism of equilibrium

statistical mechanics such as Feynman diagrams, the proper self-energy, and

Dyson's equation. The aims are threefold: (i) to explain the fundamentals of

nonequilibrium quantum field theory as simple as possible on the basis of the

knowledge of the equilibrium counterpart; (ii) to elucidate the hierarchy in

describing nonequilibrium systems from Dyson's equation on the Keldysh contour

to the Navier-Stokes equation in fluid mechanics via quantum transport

equations and the Boltzmann equation; (iii) to derive an expression of

nonequilibrium entropy that evolves with time. In stage (i), we introduce

nonequilibrium Green's function and the self-energy uniquely on the round-trip

Keldysh contour, thereby avoiding possible confusions that may arise from

defining multiple Green's functions at the very beginning. We try to present

the Feynman rules for the perturbation expansion as simple as possible. In

particular, we focus on the self-consistent perturbation expansion with the

Luttinger-Ward thermodynamic functional, i.e., Baym's Phi-derivable

approximation, which has a crucial property for nonequilibrium systems of

obeying various conservation laws automatically. We also show how the

two-particle correlations can be calculated within the Phi-derivable

approximation, i.e., an issue of how to handle the

"Bogoliubov-Born-Green-Kirkwood-Yvons (BBGKY) hierarchy".

\\ ( http://arxiv.org/abs/1005.0393 , 5810kb)

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arXiv:1005.0428

Date: Tue, 4 May 2010 02:01:30 GMT (2577kb)

Title: An Artificial Frustrated System: Cold Atoms in Triangular Optical

Lattice

Authors: Yao-Hua Chen, Wei Wu, Hong-Shuai Tao, and Wu-Ming Liu

Categories: cond-mat.quant-gas

\\

We investigate the strongly correlated effect of cold atoms in triangular

optical lattice by dynamical cluster approximation combining with the

continuous time quantum Monte Carlo method proposed recently. It is found the

double occupancy is suppressed as the atomic interaction increases. By

calculating the density of states, we show how the system evolves from Fermi

liquid with an obvious quasi-particle peak into Mott insulator with an opened

gap for increasing interaction. The transition between Fermi liquid and

pseudogap shows a reentrant behavior due to the Kondo effect. At low

temperature, a Kondo peak appears before the splitting of the Fermi-liquid-like

peak. The Fermi surface evolves from a circular ring with high amplitude into a

{\deg}at elliptical ring with low amplitude for the increasing interaction. We

give an experimental protocol to observe these phenomena by varying the lattice

depth and the atomic interaction via Feshbach resonance in future experiments.

\\ ( http://arxiv.org/abs/1005.0428 , 2577kb)

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arXiv:1005.0458

Date: Tue, 4 May 2010 08:04:21 GMT (695kb)

Title: Interacting multi-component exciton gases in a potential trap: phase

separation and Bose-Einstein condensation

Authors: S. Sobkowiak, D. Semkat, H. Stolz, Th. Koch, and H. Fehske

Categories: cond-mat.quant-gas

Comments: 7 pages, 6 figures

\\

The system under consideration is a multi-component gas of interacting para-

and orthoexcitons confined in a three dimensional potential trap. We calculate

the spatially resolved optical emission spectrum due to interband transitions

involving weak direct and phonon mediated exciton-photon interactions. For each

component, the occurrence of a Bose-Einstein condensate changes the spectrum in

a characteristic way so that it directly reflects the constant chemical

potential of the excitons and the renormalization of the quasiparticle

excitation spectrum. Moreover, the interaction between the components leads, in

dependence on temperature and particle number, to modifications of the spectra

indicating phase separation of the subsystems. Typical examples of density

profiles and luminescence spectra of ground-state para- and orthoexcitons in

cuprous oxide are given.

\\ ( http://arxiv.org/abs/1005.0458 , 695kb)

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arXiv:1005.0461

Date: Tue, 4 May 2010 08:12:37 GMT (52kb)

Title: Fermi super-Tonks-Girardeau gas in a spin-1/2 interacting Fermi system

Authors: Liming Guan and Shu Chen

Categories: cond-mat.quant-gas

Comments: 4 pages, 4 figures

\\

The Fermi gases confined in tight one-dimensional waveguides would form

two-particle bound states of atoms in the presence of a strongly attractive

interaction. Based on the exact solution of the one-dimensional spin-1/2

interacting Fermi gas, we demonstrate that a stable excited state with no

pairing between attractive fermionic atoms can be realized by a sudden switch

of interaction from strongly repulsive regime to the strongly attractive

regime. Such a state is an exact fermionic analog of the experimentally

observed super-Tonks-Girardeau state of bosonic Cesium atoms [Science 325, 1224

(2009)] and should be possible to be observed by the experiment. We also show

that the Fermi super-Tonks-Girardeau state can be realized in the

multi-component Fermi gas.

\\ ( http://arxiv.org/abs/1005.0461 , 52kb)

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arXiv:1005.0463

Date: Tue, 4 May 2010 08:22:07 GMT (22kb)

Title: Mott Insulator to Superfluid transition in Bose-Bose mixtures in a

two-dimensional lattice

Authors: M. Guglielmino, V. Penna and B. Capogrosso-Sansone

Categories: cond-mat.quant-gas

Comments: 4 pages, 3 figures, submitted to PRA

\\

We perform a numeric study (Worm algorithm Monte Carlo simulations) of

ultracold two-component bosons in two-dimensional optical lattices. We study

how the Mott insulator to superfluid transition is affected by the presence of

a second superfluid bosonic species. We find that, at fixed interspecies

interaction, the upper and lower boundaries of the Mott lobe are differently

modified. The lower boundary is strongly renormalized even for relatively low

filling factor of the second component and moderate (interspecies) interaction.

The upper boundary, instead, is affected only for large enough filling of the

second component. Whereas boundaries are renormalized we find evidence of

polaron-like excitations. Our results are of interest for current experimental

setups.

\\ ( http://arxiv.org/abs/1005.0463 , 22kb)

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arXiv:1005.0473

Date: Tue, 4 May 2010 09:46:54 GMT (1021kb)

Title: Geometric scale invariance as a route to macroscopic degeneracy: loading

a toroidal trap with a Bose or Fermi gas

Authors: D. Baillie, P. B. Blakie, and A. S. Bradley

Categories: cond-mat.quant-gas

Comments: 13 pages, 6 figures.

\\

An easily scalable toroidal geometry presents an opportunity for creating

large scale persistent currents in Bose-Einstein condensates, for studies of

the Kibble-Zurek mechanism, and for investigations of toroidally trapped

degenerate Fermi gases. We consider in detail the process of isentropic loading

of a Bose or Fermi gas from a harmonic trap into the scale invariant toroidal

regime that exhibits a high degree of system invariance when increasing the

radius of the toroid. The heating involved in loading a Bose gas is evaluated

analytically and numerically, both above and below the critical temperature.

Our numerical calculations treat interactions within the

Hartree-Fock-Bogoliubov-Popov theory. Minimal change in degeneracy is observed

over a wide range of initial temperatures, and a regime of cooling is

identified. The scale invariant property is further investigated analytically

by studying the density of states of the system, revealing the robust nature of

scale invariance in this trap, for both bosons and fermions. We give analytical

results for a Thomas-Fermi treatment. We calculate the heating due to loading a

spin-polarized Fermi gas and compare with analytical results for high and low

temperature regimes. The Fermi gas is subjected to irreducible heating during

loading, caused by the loss of one degree of freedom for thermalization.

\\ ( http://arxiv.org/abs/1005.0473 , 1021kb)

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\\

arXiv:1005.0485 (*cross-listing*)

Date: Tue, 4 May 2010 10:23:33 GMT (341kb,D)

Title: The crossover from strong to weak chaos for nonlinear waves in

disordered systems

Authors: T.V. Laptyeva, J.D. Bodyfelt, D.O. Krimer, Ch. Skokos, S. Flach

Categories: nlin.CD cond-mat.dis-nn

Comments: 4 pages, 2 figures. Submitted to Phys. Rev. Lett.

\\

We observe a crossover from strong to weak chaos in the evolution of multiple

site excitations within disordered chains with cubic nonlinearity. Recent

studies have shown that Anderson localization is destroyed, and the wave packet

spreading is characterized by an asymptotic divergence of the second moment in

time, as t^(1/3). In the present paper, we observe the existence of a

qualitatively new dynamical regime in which the second moment spreads even

faster [ as t^(1/2) ], with a crossover to the asymptotic t^(1/3) law at larger

times. We analyze the pecularities of these spreading regimes and perform

extensive numerical simulations over large times with ensemble averaging. A

novel technique of local derivatives on logarithmic scales is developed in

order to quantitatively visualize the slow crossover processes.

\\ ( http://arxiv.org/abs/1005.0485 , 341kb)

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\\

arXiv:1005.0546

Date: Tue, 4 May 2010 15:06:21 GMT (988kb,D)

Title: Super Stability of Laminar Vortex Flow in Superfluid 3He-B

Authors: V.B. Eltsov, R. de Graaf, P.J. Heikkinen, J.J. Hosio, R. Hanninen, M.

Krusius, and V.S. L'vov

Categories: cond-mat.other

Comments: 4 pages, 6 figures

\\

Vortex flow remains laminar up to large Reynolds numbers (Re~1000) in a

cylinder filled with 3He-B. This is inferred from NMR measurements and

numerical vortex filament calculations where we study the spin up and spin down

responses of the superfluid component, after a sudden change in rotation

velocity. In normal fluids and in superfluid 4He these responses are turbulent.

In 3He-B the vortex core radius is much larger which reduces both surface

pinning and vortex reconnections, the phenomena, which enhance vortex bending

and the creation of turbulent tangles. Thus the origin for the greater

stability of vortex flow in 3He-B is a quantum phenomenon. Only large flow

perturbations are found to make the responses turbulent, such as the walls of a

cubic container or the presence of invasive measuring probes inside the

container.

\\ ( http://arxiv.org/abs/1005.0546 , 988kb)

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\\

arXiv:1005.0603

Date: Tue, 4 May 2010 18:35:50 GMT (554kb)

Title: Spin squeezing of high-spin, spatially extended quantum fields

Authors: Jay D. Sau, S. R. Leslie, Marvin L. Cohen, and D. M. Stamper-Kurn

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

Comments: 18 pages, 5 figures

\\

Investigations of spin squeezing in ensembles of quantum particles have been

limited primarily to a subspace of spin fluctuations and a single spatial mode

in high-spin and spatially extended ensembles. Here, we show that a wider range

of spin-squeezing is attainable in ensembles of high-spin atoms, characterized

by sub-quantum-limited fluctuations in several independent planes of

spin-fluctuation observables. Further, considering the quantum dynamics of an

$f=1$ ferromagnetic spinor Bose-Einstein condensate, we demonstrate

theoretically that a high degree of spin squeezing is attained in multiple

spatial modes of a spatially extended quantum field, and that such squeezing

can be extracted from spatially resolved measurements of magnetization and

nematicity, i.e.\ the vector and quadrupole magnetic moments, of the quantum

gas. Taking into account several experimental limitations, we predict that the

variance of the atomic magnetization and nematicity may be reduced as far as 20

dB below the standard quantum limits.

\\ ( http://arxiv.org/abs/1005.0603 , 554kb)

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\\

arXiv:1005.0638

Date: Tue, 4 May 2010 21:44:25 GMT (413kb)

Title: Spin-supersolid versus phase separation in frustrated antiferromagnets

Authors: A. Fabricio Albuquerque, Nicolas Laflorencie, Jean-David Picon and

Fr\'ed\'eric Mila

Categories: cond-mat.str-el

Comments: 6 pages, 6 figures

\\

We investigate the possibility to stabilize spin-supersolidity in a

frustrated $S=1/2$ Heisenberg model of weakly coupled dimers, with special

emphasis on its competition with phase separation. This study is based on

effective models derived with the contractor renormalization (CORE) algorithm

and studied with a self-consistent cluster mean-field theory, complemented by

an investigation of phase separation based on a "leapfrog mechanism". A region

of stable supersolidity is identified at intermediate frustration. However, at

strong frustration, supersolidity is found to be unstable towards phase

separation, in contradiction with recent results based on a tensor-product

algorithm. The reliability of the present approach is demonstrated in the

context of a non-frustrated, anisotropic version of the model for which

extensive Quantum Monte Carlo simulations have been performed. Finally, to

guide the search for experimenral realizations of supersolidity in Mott

insulators, the full phase diagram as a function of frustation and magnetic

field is derived.

\\ ( http://arxiv.org/abs/1005.0638 , 413kb)

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\\

arXiv:1005.0652

Date: Wed, 5 May 2010 00:16:26 GMT (1659kb)

Title: Exact solution for quantum dynamics of a periodically-driven

two-level-system

Authors: Anirban Gangopadhyay, Maxim Dzero, and Victor Galitski

Categories: cond-mat.mtrl-sci quant-ph

Comments: 13 pages, 7 EPS figures

\\

We present a family of exact analytic solutions for non-linear quantum

dynamics of a two-level system (TLS) subject to a periodic-in-time external

field. In constructing the exactly solvable models, we use a "reverse

engineering" approach where the form of external perturbation is chosen to

preserve an integrability constraint, which yields a single non-linear

differential equation for the ac-field. A solution to this equation is

expressed in terms of Jacobi elliptic functions with three independent

parameters that allows one to choose the frequency, average value, and

amplitude of the time-dependent field at will. This form of the ac-drive is

especially relevant to the problem of dynamics of TLS charge defects that cause

dielectric losses in superconducting qubits. We apply our exact results to

analyze non-linear dielectric response of such TLSs and show that the position

of the resonance peak in the spectrum of the relevant correlation function is

determined by the quantum-mechanical phase accumulated by the TLS wave-function

over a time evolution cycle. It is shown that in the non-linear regime, this

resonance frequency may be shifted strongly from the value predicted by the

canonical TLS model. We also analyze the "spin" survival probability in the

regime of strong external drive and recover a coherent destruction of tunneling

phenomenon within our family of exact solutions, which manifests itself as a

strong suppression of "spin-flip" processes and suggests that such non-linear

dynamics in LC-resonators may lead to lower losses.

\\ ( http://arxiv.org/abs/1005.0652 , 1659kb)

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\\

arXiv:1005.0656

Date: Wed, 5 May 2010 01:04:17 GMT (827kb)

Title: Metastable Quantum Phase Transitions in a One-Dimensional Bose Gas

Authors: Lincoln D. Carr, Rina Kanamoto, and Masahito Ueda

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

Comments: 33 pages, 12 figures, book will appear later this year

Journal-ref: Chap. 13 in "Understanding Quantum Phase Transitions", ed. Lincoln

D. Carr (Taylor & Francis, Boca Raton, 2010)

\\

This is a chapter for a book. The first paragraph of this chapter is as

follows: "Ultracold quantum gases offer a wonderful playground for quantum many

body physics, as experimental systems are widely controllable, both statically

and dynamically. One such system is the one-dimensional (1D) Bose gas on a

ring. In this system binary contact interactions between the constituent

bosonic atoms, usually alkali metals, can be controlled in both sign and

magnitude; a recent experiment has tuned interactions over seven orders of

magnitude, using an atom-molecule resonance called a Feshbach resonance. Thus

one can directly realize the Lieb-Liniger Hamiltonian, from the weakly- to the

strongly-interacting regime. At the same time there are a number of experiments

utilizing ring traps. The ring geometry affords us the opportunity to study

topological properties of this system as well; one of the main properties of a

superfluid is the quantized circulation in which the average angular momentum

per particle, L/N, is quantized under rotation. Thus we focus on a tunable 1D

Bose system for which the main control parameters are interaction and rotation.

We will show that there is a critical boundary in the interaction-rotation

control-parameter plane over which the topological properties of the system

change. This is the basis of our concept of \textit{metastable quantum phase

transitions} (QPTs). Moreover, we will show that the finite domain of the ring

is necessary for the QPT to occur at all because the zero-point kinetic

pressure can induce QPTs, i.e., the system must be finite; we thus seek to

generalize the concept of QPTs to inherently finite, mesoscopic or nanoscopic

systems."

\\ ( http://arxiv.org/abs/1005.0656 , 827kb)

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\\

arXiv:1005.0666

Date: Wed, 5 May 2010 04:21:22 GMT (1368kb)

Title: Density oscillations in trapped dipolar condensates

Authors: H.-Y. Lu, H. Lu, J.-N. Zhang, R.-Z. Qiu, H. Pu, and S. Yi

Categories: cond-mat.quant-gas

Comments: 7 pages, 9 figures

\\

We investigated the ground state wave function and free expansion of a

trapped dipolar condensate. We find that dipolar interaction may induce both

biconcave and dumbbell density profiles in, respectively, the pancake- and

cigar-shaped traps. On the parameter plane of the interaction strengths, the

density oscillation occurs only when the interaction parameters fall into

certain isolated areas. The relation between the positions of these areas and

the trap geometry is explored. By studying the free expansion of the condensate

with density oscillation, we show that the density oscillation is detectable

from the time-of-flight image.

\\ ( http://arxiv.org/abs/1005.0666 , 1368kb)

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\\

arXiv:1005.0668

Date: Wed, 5 May 2010 04:36:31 GMT (66kb)

Title: Degenerate Fermi Gas of $^{87}$Sr

Authors: B. J. DeSalvo, M. Yan, P. G. Mickelson, Y. N. Martinez de Escobar, and

T. C. Killian

Categories: cond-mat.quant-gas

Comments: 4 pages, 3 figures

\\

We report quantum degeneracy in a gas of ultra-cold fermionic $^{87}$Sr

atoms. By evaporatively cooling a mixture of spin states in an optical dipole

trap for 10.5\,s, we obtain samples well into the degenerate regime with

$T/T_F=0.26^{+.05}_{-.06}$. The main signature of degeneracy is a change in the

momentum distribution as measured by time-of-flight imaging, and we also

observe a decrease in evaporation efficiency below $T/T_F \sim 0.5$.

\\ ( http://arxiv.org/abs/1005.0668 , 66kb)

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\\

arXiv:1005.0757

Date: Wed, 5 May 2010 14:16:37 GMT (622kb)

Title: Statistical Mechanics of Floquet Systems with Regular and Chaotic States

Authors: Roland Ketzmerick and Waltraut Wustmann

Categories: cond-mat.stat-mech nlin.CD quant-ph

Comments: 17 pages, 11 figures

\\

We investigate the asymptotic state of time-periodic quantum systems with

regular and chaotic Floquet states weakly coupled to a heat bath. The

asymptotic occupation probabilities of these two types of states follow

fundamentally different distributions. Among regular states the probability

decreases from the state in the center of a regular island to the outermost

state by orders of magnitude, while chaotic states have almost equal

probabilities. We derive an analytic expression for the occupations of regular

states of kicked systems, which depends on the winding numbers of the regular

tori and the parameters temperature and driving frequency. For weakly variable

winding numbers within a regular island it simplifies to Boltzmann-like weights

$\exp(-\betaeff \Ereg_m)$, similar as in time-independent systems. For this we

introduce the regular energies $\Ereg_m$ of the quantizing tori and an

effective, winding number dependent temperature $1/\betaeff$, different from

the actual bath temperature. Furthermore, the occupations of other typical

Floquet states in a mixed phase space are studied, i.e. regular states on

nonlinear resonances, beach states, and hierarchical states, giving rise to

distinct features in the occupation distribution. In the presence of avoided

crossings we demonstrate drastic consequences for the occupations of regular

states. We introduce a simplified rate model whose analytic solutions describe

the occupations quite accurately.

\\ ( http://arxiv.org/abs/1005.0757 , 622kb)

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\\

arXiv:1005.0866 (*cross-listing*)

Date: Wed, 5 May 2010 23:15:00 GMT (909kb)

Title: Intensity fluctuations in steady state superradiance

Authors: D. Meiser and M. J. Holland

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

Comments: 8 pages, 5 figures

\\

Alkaline-earth like atoms with ultra-narrow optical transitions enable

superradiance in steady state. The emitted light promises to have an

unprecedented stability with a linewidth as narrow as a few millihertz. In

order to evaluate the potential usefulness of this light source as an

ultrastable oscillator in clock and precision metrology applications it is

crucial to understand the noise properties of this device. In this paper we

present a detailed analysis of the intensity fluctuations by means of

Monte-Carlo simulations and semi-classical approximations. We find that the

light exhibits bunching below threshold, is to a good approximation coherent in

the superradiant regime, and is chaotic above the second threshold.

\\ ( http://arxiv.org/abs/1005.0866 , 909kb)

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\\

arXiv:1005.0889

Date: Thu, 6 May 2010 05:59:41 GMT (123kb)

Title: The $j$-triplet Cooper pairing with magnetic dipolar interactions

Authors: Yi Li and Congjun Wu

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

\\

We study the Cooper pairing problem in the two component ultra-cold fermion

systems with magnetic dipolar interactions. Novel $p$-wave spin triplet

$(l=s=1)$ pairing phases are identified, which are markedly different from the

superfluid $^3$He-$A$ and $B$ phases. Orbital and spin angular momenta of

Cooper pairs are entangled into the channel of total angular momentum $j=1$.

Two possible pairing configurations include the unitary helical polar pairing

$(j_z = 0)$ and the non-unitary axial pairing $(j_z = 1)$. The polar pairing

preserves time-reversal symmetry, while the axial pairing breaks it. In the

weak coupling mean-field theory, the helical polar pairing wins over the axial

pairing.

\\ ( http://arxiv.org/abs/1005.0889 , 123kb)

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\\

arXiv:1005.0890

Date: Thu, 6 May 2010 06:01:08 GMT (1506kb,D)

Title: Matter waves in the Talbot-Lau interferometry

Authors: Valeriy I. Sbitnev

Categories: quant-ph

Comments: 13 pages, 14 figures

\\

Paths of particles, emitted from distributed sources of the particles and

passing out through slits of gratings G_0 and G_1 up to detectors, have been

computed in details by the path integral method. Matter-waves computed by this

method show perfect interference pattern both between the gratings and behind

the second grating. Emergence of the Talbot carpet represents a control test of

the computations. Computations of the interference patterns have been carried

out for two cases: (a) small amount of slits in the gratings; and (b) large

amount of slits. In the last case interference fringes of high order arise.

They are induced by interference of waves from extra lateral slits. Paraxial

approximation stems from the formulas at removing the distributed sources to

infinity.

As model particles we choose here fullerene molecules. De Broglie wavelength

of the molecules is adopted equal to 5 pm. PACS numbers: {03.75.-b, 03.75.Dg,

42.25.Hz}

\\ ( http://arxiv.org/abs/1005.0890 , 1506kb)

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\\

arXiv:1005.0915

Date: Thu, 6 May 2010 07:52:09 GMT (2790kb,D)

Title: Disorder and interference: localization phenomena

Authors: Cord A. Mueller (CQT, Singapore) and Dominique Delande (LKB, Paris)

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

Comments: Notes of a lecture delivered at the Les Houches School of Physics in

Singapore on "Ultracold gases and quantum information" in 2009.

\\

The specific problem we address in these lectures is the problem of transport

and localization in disordered systems, when interference is present, as

characteristic for waves, with a focus on realizations with ultracold atoms.

\\ ( http://arxiv.org/abs/1005.0915 , 2790kb)

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\\

arXiv:1005.0987

Date: Thu, 6 May 2010 12:26:18 GMT (6kb)

Title: Bogoliubov's Vision and Modern Theoretical Physics

Authors: A.L. Kuzemsky

Categories: physics.hist-ph

Comments: 6 pages

\\

A brief survey of the author's works on the fundamental conceptual ideas of

quantum statistical physics developed by N. N. Bogoliubov and his school was

given. The development and applications of the method of quasiaverages to

quantum statistical physics and condensed matter physics were analyzed. The

relationship with the concepts of broken symmetry, quantum protectorate and

emergence was examined, and the progress to date towards unified understanding

of complex many-particle systems was summarized. Current trends for extending

and using these ideas in quantum field theory and condensed matter physics were

discussed, including microscopic theory of superfluidity and superconductivity,

quantum theory of magnetism of complex materials, Bose-Einstein condensation,

chirality of molecules, etc.

\\ ( http://arxiv.org/abs/1005.0987 , 6kb)

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\\

arXiv:1005.1061 (*cross-listing*)

Date: Thu, 6 May 2010 19:35:58 GMT (705kb)

Title: Nonlinearity from quantum mechanics: Dynamically unstable Bose-Einstein

condensate in a double-well trap

Authors: Juha Javanainen

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

Comments: very close to published version

Journal-ref: Phys. Rev. A 81, 051602(R) (2010)

DOI: 10.1103/PhysRevA.81.051602

\\

We study theoretically an atomic Bose-Einstein condensate in a double-well

trap both quantum mechanically and classically under conditions such that in

the classical model an unstable equilibrium dissolves into large-scale

oscillations of the atoms between the potential wells. Quantum mechanics alone

does not exhibit such nonlinear dynamics, but measurements of the atom numbers

in the potential wells may nevertheless cause the condensate to behave

essentially classically.

\\ ( http://arxiv.org/abs/1005.1061 , 705kb)

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The replacements:

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\\

arXiv:0910.1114

replaced with revised version Sat, 1 May 2010 02:55:41 GMT (190kb)

Title: Isentropes of spin-1 bosons in an optical lattice

Authors: K. W. Mahmud, G. G. Batrouni, R. T. Scalettar

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

Comments: 8 pages, 8 figures, Revised version

Journal-ref: Phys. Rev. A 81, 033609 (2010)

\\ ( http://arxiv.org/abs/0910.1114 , 190kb)

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\\

arXiv:1001.3773

replaced with revised version Sat, 1 May 2010 14:28:21 GMT (55kb)

Title: Comparative study of theoretical methods for nonequilibrium quantum

transport

Authors: J. Eckel, F. Heidrich-Meisner, S.G. Jakobs, M. Thorwart, M. Pletyukhov

and R. Egger

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

Comments: 19 pages, 7 figures; published version

Journal-ref: New. J. Phys. 12, 043042 (2010)

\\ ( http://arxiv.org/abs/1001.3773 , 55kb)

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\\

arXiv:1001.4720

replaced with revised version Thu, 6 May 2010 15:29:43 GMT (67kb)

Title: Phase separation of trapped spin-imbalanced Fermi gases in

one-dimensional optical lattices

Authors: F. Heidrich-Meisner, G. Orso, A. Feiguin

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

Comments: 7 pages Revtex4, 9 eps figures; version as published, minor revisions

Journal-ref: Phys. Rev. A. 81, 053602 (2010)

DOI: 10.1103/PhysRevA.81.053602

\\ ( http://arxiv.org/abs/1001.4720 , 67kb)

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\\

arXiv:1004.0683

replaced with revised version Mon, 3 May 2010 16:22:30 GMT (504kb)

Title: Sub-Fourier characteristics of a $\delta$-kicked rotor resonance

Authors: I. Talukdar, R. Shrestha, G. S. Summy

Categories: physics.atom-ph

Comments: 4 pages, 5 figures

\\ ( http://arxiv.org/abs/1004.0683 , 504kb)

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\\

arXiv:quant-ph/0610166 (*cross-listing*)

replaced with revised version Wed, 5 May 2010 00:16:40 GMT (343kb)

Title: Dynamical Realization of Macroscopic Superposition States of Cold Bosons

in a Tilted Double Well

Authors: Lincoln D. Carr, D. R. Dounas-Frazer, and Miguel-\'Angel

Garc\'ia-March

Categories: quant-ph cond-mat.other

Comments: 6 pages, 5 figures, final version, only minor changes from previous

arXiv version

Journal-ref: Europhys. Lett., v. 90, p. 10005 (2010)

DOI: 10.1209/0295-5075/90/10005

\\ ( http://arxiv.org/abs/quant-ph/0610166 , 343kb)

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\\

arXiv:cond-mat/0612009

replaced with revised version Mon, 3 May 2010 04:34:28 GMT (209kb)

Title: Quantum phases, Supersolids and quantum phase transitions of interacting

bosons in frustrated lattices

Authors: Yan Chen and Jinwu Ye

Categories: cond-mat.str-el cond-mat.mtrl-sci math-ph math.MP

Comments: REVTEX4, 20 PRB pages, 25 eps figures

\\ ( http://arxiv.org/abs/cond-mat/0612009 , 209kb)

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\\

arXiv:quant-ph/0610166

replaced with revised version Wed, 5 May 2010 00:16:40 GMT (343kb)

Title: Dynamical Realization of Macroscopic Superposition States of Cold Bosons

in a Tilted Double Well

Authors: Lincoln D. Carr, D. R. Dounas-Frazer, and Miguel-\'Angel

Garc\'ia-March

Categories: quant-ph cond-mat.other

Comments: 6 pages, 5 figures, final version, only minor changes from previous

arXiv version

Journal-ref: Europhys. Lett., v. 90, p. 10005 (2010)

DOI: 10.1209/0295-5075/90/10005

\\ ( http://arxiv.org/abs/quant-ph/0610166 , 343kb)

------------------------------------------------------------------------------

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 Thu Jun 10 2010 - 16:22:09 EST

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