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

Date: Mon, 12 Jan 2009 09:42:15 +1000

Date: Mon, 12 Jan 2009 09:42:15 +1000

The following message was sent to the matts_arxiv list by Matthew Davis <mdavis_at_physics.uq.edu.au>

Hi all,

To get the week started, here is another 37 new preprints and 23 replacements

from December.

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arXiv:0812.1191

Date: Fri, 5 Dec 2008 19:13:26 GMT (198kb)

Title: Three-body loss in lithium from functional renormalization

Authors: R. Schmidt, S. Floerchinger, and C. Wetterich

Categories: cond-mat.other

Comments: 4 pages, 4 figures

\\

We use functional integral methods for an estimate of the three-body loss in

a three-component $^6$Li ultracold atom gas. We advocate a simple picture where

the loss proceeds by the formation of a three-atom bound state, the trion. In

turn, the effective amplitude for the trion formation from three atoms is

estimated from a simple effective boson exchange process. The energy gap of the

trion and other key quantities for the loss coefficient are computed in a

functional renormalization group framework.

\\ ( http://arxiv.org/abs/0812.1191 , 198kb)

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arXiv:0812.1204

Date: Fri, 5 Dec 2008 19:37:33 GMT (569kb)

Title: Phase-diffusion dynamics in weakly coupled Bose-Einstein condensates

Authors: Erez Boukobza, Maya Chuchem, Doron Cohen, and Amichay Vardi

Categories: cond-mat.other

Comments: 5 pages, 4 figures

\\

We study the phase-sensitivity of collisional phase-diffusion between weakly

coupled Bose-Einstein condensates, using a semiclassical picture of the

two-mode Bose-Hubbard model. When weak-coupling is allowed, zero relative phase

locking is attained in the Josephson-Fock transition regime, whereas a $\pi$

relative phase is only locked in Rabi-Josephson point. Our analytic

semiclassical estimates agree well with the numerical results.

\\ ( http://arxiv.org/abs/0812.1204 , 569kb)

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arXiv:0812.0883 (*cross-listing*)

Date: Thu, 4 Dec 2008 09:13:16 GMT (21kb)

Title: Quantum Monte Carlo method applied to strongly correlated dilute fermi

gases with finite effective range

Authors: G. Wlazlowski, P. Magierski

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

Comments: 7 pages, 1 figure, proceedings from XIV Nuclear Physics Workshop in

Kazimierz Dolny, Poland

\\

We discuss the Auxiliary Field Quantum Monte Carlo (AFQMC) method applied to

dilute neutron matter at finite temperatures. We formulate the discrete

Hubbard-Stratonovich transformation for the interaction with finite effective

range which is free from the sign problem. The AFQMC results are compared with

those obtained from exact diagonalization for a toy model. Preliminary

calculations of energy and chemical potential as a function of temperature are

presented.

\\ ( http://arxiv.org/abs/0812.0883 , 21kb)

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arXiv:0812.1066

Date: Fri, 5 Dec 2008 01:35:26 GMT (110kb)

Title: Pure Quantum Correlations Between Bright Optical Beams

Authors: Yana Shang, Zhihui Yan, Xiaojun Jia, Xiaolong Su, Changde Xie, and

Kunchi Peng

Categories: quant-ph

\\

The pure quantum correlations totally independent of the classical coherence

of light have been experimentally demonstrated. By measuring the visibility of

the interference fringes and the correlation variances of amplitude and phase

quadratures between a pair of bright twin optical beams with different

frequencies produced from a non-degenerate optical parametric oscillator, we

found that when classical interference became worse even vanished, the

quadrature quantum correlations were not influenced, completely. The presented

experiment obviously shows the quantum correlations of light do not necessarily

imply the classical coherence.

\\ ( http://arxiv.org/abs/0812.1066 , 110kb)

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arXiv:0812.1154

Date: Fri, 5 Dec 2008 14:03:45 GMT (3020kb)

Title: Sympathetically cooled molecular ions: from principles to first

applications

Authors: Bernhard Roth, Stephan Schiller

Categories: quant-ph

Comments: 52 pages, 41 figures; to appear in "Cold Molecules", R. Krems, B.

Friedrich, and W. Stwalley, eds., Taylor and Francis (2009)

\\

We review the current status of the field of sympathetically cooled molecular

ions, i.e. the method used for cooling the translational degrees of freedom,

the techniques applied for detection and analysis of the cold trapped ion

ensembles produced as well as first applications. We summarize a few salient

results and point out various possibilities for future developments.

\\ ( http://arxiv.org/abs/0812.1154 , 3020kb)

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arXiv:0812.1209

Date: Fri, 5 Dec 2008 19:52:15 GMT (242kb)

Title: Transient dynamics and momentum redistribution in cold atoms via

recoil-induced resonances

Authors: Joel A. Greenberg and Daniel J. Gauthier

Categories: quant-ph

Comments: 7 pages, 6 figures

\\

We use an optically dense, anisotropic magneto-optical trap to study

recoil-induced resonances (RIRs) in the transient, high-gain regime. We find

that two distinct mechanisms govern the atomic dynamics: the finite,

frequency-dependent atomic response time, and momentum-space population

redistribution. At low input probe intensities, the residual Doppler width of

the atoms, combined with the finite atomic response time, result in a linear,

transient hysteretic effect that modifies the locations, widths, and magnitudes

of the resulting gain spectra depending on the sign of the scan chirp. When

larger intensities (\textit{i.e.}, greater than a few $\mu$W/cm$^2$) are

incident on the atomic sample for several $\mu$s, hole-burning in the atomic

sample's momentum distribution leads to a coherent population redistribution

that persists for approximately 100 $\mu$s. We propose using RIRs to engineer

the atomic momentum distribution to enhance the nonlinear atom-photon coupling.

We present a numerical model, and compare the calculated and experimental

results to verify our interpretation.

\\ ( http://arxiv.org/abs/0812.1209 , 242kb)

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arXiv:0812.0815 (*cross-listing*)

Date: Wed, 3 Dec 2008 21:07:07 GMT (284kb)

Title: Fermion induced superfluid decoherence in the boson Hubbard model on an

optical lattice

Authors: Roman M. Lutchyn, Sumanta Tewari, S. Das Sarma

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

Comments: 4 pages, 1 eps figure

\\

We study the phase diagram of a degenerate gas of bosons in an optical

lattice, described by the boson Hubbard Hamiltonian, interacting with

spin-polarized fermions. Virtual transitions of the bosons to the higher Bloch

bands, coupled with the contact interspecies interactions of either sign,

result in an effective increase of the bosonic on-site repulsion. If this

renormalization of the on-site potential is dominant over the fermionic

screening of the boson interactions, superfluid coherence of the Bose-Hubbard

system will be reduced by the fermions. We discuss experimental implications

for cold atomic systems.

\\ ( http://arxiv.org/abs/0812.0815 , 284kb)

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arXiv:0812.1277

Date: Sat, 6 Dec 2008 11:14:26 GMT (883kb)

Title: Ground state properties of a Tonks-Girardeau Gas in a periodic potential

Authors: Bo-Bo Wei, Shi-Jian Gu and Hai-Qing Lin

Categories: cond-mat.stat-mech cond-mat.mes-hall

Comments: 7 pages

\\

In this paper, we investigate the ground-state properties of a bosonic

Tonks-Girardeau gas confined in a one-dimensional periodic potential. The

single-particle reduced-density matrix is computed numerically for systems up

to N=41 bosons. Then we are able to study the scaling behavior of the

occupation numbers of the most dominant orbital for both commensurate and

non-commensurate cases, which correspond to an insulating phase and a

conducting phase, respectively. We find that, in the commensurate case, the

fractional occupation decays as $f_0 \propto 1/\ln N$ with the particle number,

while $f_0 \propto 1/N^{0.44}$ in the non-commensurate case. So there is no BEC

in both cases. The study of zero momentum peaks shows that $n(0)\propto N$ in

commensurate case, which implies that all bonons are localized in the

insulating phase.

\\ ( http://arxiv.org/abs/0812.1277 , 883kb)

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arXiv:0812.1317

Date: Sat, 6 Dec 2008 22:12:50 GMT (1190kb)

Title: Exploring Universality of Few-Body Physics Based on Ultracold Atoms Near

Feshbach Resonances

Authors: Nathan Gemelke, Chen-Lung Hung, Xibo Zhang, Cheng Chin

Categories: cond-mat.other

Comments: ICAP 2008 Proceeding

\\

A universal characterization of interactions in few- and many-body quantum

systems is often possible without detailed description of the interaction

potential, and has become a defacto assumption for cold atom research.

Universality in this context is defined as the validity to fully characterize

the system in terms of two-body scattering length. We discuss universality in

the following three contexts: closed-channel dominated Feshbach resonance,

Efimov physics near Feshbach resonances, and corrections to the mean field

energy of Bose-Einstein condensates with large scattering lengths. Novel

experimental tools and strategies are discussed to study universality in

ultracold atomic gases: dynamic control of interactions, run-away evaporative

cooling in optical traps, and preparation of few-body systems in optical

lattices.

\\ ( http://arxiv.org/abs/0812.1317 , 1190kb)

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arXiv:0812.1332

Date: Sun, 7 Dec 2008 09:35:57 GMT (318kb,D)

Title: Critical properties of a trapped interacting Bose gas

Authors: A. Bezett and P. B. Blakie

Categories: cond-mat.stat-mech

Comments: 10 pages, 9 figures

\\

We develop a practical theoretical formalism for studying the critical

properties of a trapped Bose-Einstein condensate using the projected

Gross-Pitaevskii equation. We show that this approach allows us investigate the

behavior of the correlation length, condensate mode and its number fluctuations

about the critical point. Motivated by recent experiments [Science {\bf 315},

1556 (2007)] we calculate the critical exponent for the correlation length,

observe clear finite-size effects, and develop characteristic length scales to

characterize the finite-size influences. We extend the Binder cumulant to the

trapped system and discuss an experimental method for measuring number

fluctuations.

\\ ( http://arxiv.org/abs/0812.1332 , 318kb)

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arXiv:0812.1439

Date: Mon, 8 Dec 2008 09:34:36 GMT (510kb)

Title: Vortex splitting and phase separating instabilities of coreless vortices

in F=1 spinor Bose-Einstein condensates

Authors: M. Takahashi, V. Pietila, M. Mottonen, T. Mizushima, K. Machida

Categories: cond-mat.other

Comments: 11 pages, 9 figures

\\

The low lying excitations of coreless vortex states in F = 1 spinor

Bose-Einstein condensates (BECs) are theoretically investigated using the

Gross-Pitaevskii and Bogoliubov-de Gennes equations. The spectra of the

elementary excitations are calculated for different spin-spin interaction

parameters and ratios of the number of particles in each sublevel. There exist

dynamical instabilities of the vortex state which are suppressed by

ferromagnetic interactions, and conversely, enhanced by antiferromagnetic

interactions. In both of the spin-spin interaction regimes, we find vortex

splitting instabilities in analogy with scalar BECs. In addition, a phase

separating instability is found in the antiferromagnetic regime.

\\ ( http://arxiv.org/abs/0812.1439 , 510kb)

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arXiv:0812.1496

Date: Sat, 6 Dec 2008 11:39:55 GMT (3199kb)

Title: Feshbach Resonances in Ultracold Gases

Authors: Cheng Chin, Rudolf Grimm, Paul Julienne, and Eite Tiesinga

Categories: cond-mat.other

Comments: Review article, 63 pages, 48 figures

\\

Feshbach resonances are the essential tool to control the interaction between

atoms in ultracold quantum gases. They have found numerous experimental

applications, opening up the way to important breakthroughs. This Review

broadly covers the phenomenon of Feshbach resonances in ultracold gases and

their main applications. This includes the theoretical background and models

for the description of Feshbach resonances, the experimental methods to find

and characterize the resonances, a discussion of the main properties of

resonances in various atomic species and mixed-species systems, and an overview

of key experiments with atomic Bose-Einstein condensates, degenerate Fermi

gases, and ultracold molecules.

\\ ( http://arxiv.org/abs/0812.1496 , 3199kb)

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arXiv:0812.1522

Date: Mon, 8 Dec 2008 17:08:48 GMT (103kb)

Title: Coherence properties and luminescence spectra of condensed polaritons in

CdTe microcavities

Authors: M. H. Szymanska, F. M. Marchetti, J. Keeling, P. B. Littlewood

Categories: cond-mat.other

Comments: 7 pages, 6 figures

Journal-ref: Solid State Commun. 144, 364 (2007)

\\

We analyse the spatial and temporal coherence properties of a two-dimensional

and finite sized polariton condensate with parameters tailored to the recent

experiments which have shown spontaneous and thermal equilibrium polariton

condensation in a CdTe microcavity [J. Kasprzak, M. Richard, S. Kundermann, A.

Baas, P. Jeambrun, J.M.J. Keeling, F.M. Marchetti, M.H. Szymanska, R. Andre,

J.L. Staehli, et al., Nature 443 (7110) (2006) 409]. We obtain a theoretical

estimate of the thermal length, the lengthscale over which full coherence

effectively exists (and beyond which power-law decay of correlations in a

two-dimensional condensate occurs), of the order of 5 micrometers. In addition,

the exponential decay of temporal coherence predicted for a finite size system

is consistent with that found in the experiment. From our analysis of the

luminescence spectra of the polariton condensate, taking into account pumping

and decay, we obtain a dispersionless region at small momenta of the order of 4

degrees. In addition, we determine the polariton linewidth as a function of the

pump power. Finally, we discuss how, by increasing the exciton-photon detuning,

it is in principle possible to move the threshold for condensation from a

region of the phase diagram where polaritons can be described as a weakly

interacting Bose gas to a region where instead the composite nature of

polaritons becomes important.

\\ ( http://arxiv.org/abs/0812.1522 , 103kb)

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arXiv:0812.1548

Date: Mon, 8 Dec 2008 20:16:04 GMT (1635kb)

Title: Emergent Time Scale in Entangled Quantum Dynamics of Ultracold Molecules

in Optical Lattices

Authors: M. L. Wall and L. D. Carr

Categories: cond-mat.other

Comments: 31 pages, 13 figures

\\

We derive a novel lattice Hamiltonian, the \emph{Molecular Hubbard

Hamiltonian} (MHH), which describes the essential many body physics of

closed-shell ultracold heteronuclear molecules in their absolute ground state

in a quasi-one-dimensional optical lattice. The MHH is explicitly

time-dependent, making a dynamic generalization of the concept of quantum phase

transitions necessary. Using the Time-Evolving Block Decimation (TEBD)

algorithm to study entangled dynamics, we demonstrate that, in the case of hard

core bosonic molecules at half filling, the MHH exhibits an emergent time scale

over which spatial entanglement grows, crystalline order appears, and

oscillations between rotational states self-damp into an asymptotic

superposition. We show that this time scale is a non-monotonic function of the

physical parameters describing the lattice. We also point out that experimental

mapping of the static phase boundaries of the MHH can be used to measure the

molecular polarizability tensor.

\\ ( http://arxiv.org/abs/0812.1548 , 1635kb)

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arXiv:0812.1297

Date: Sat, 6 Dec 2008 17:07:27 GMT (162kb)

Title: Entanglement control in coupled two-mode boson systems

Authors: A. V. Chizhov and R. G. Nazmitdinov

Categories: quant-ph

Comments: 4 pages, 2 figures

Journal-ref: Phys. Rev. A78, 064302 (2008)

DOI: 10.1103/PhysRevA.78.064302

\\

A two-mode boson model, widely used for the physics of fast rotating nuclei

and Bose-Einstein condensates, is studied in the context of entanglement

control. We derive an analytical expression for the entanglement between the

fields in this model as a function of time. We found that depending on the

interaction strengths between boson modes and the nature of the initial boson

states the dynamical evolution of the entanglement and the squeezing can occur

independently.

\\ ( http://arxiv.org/abs/0812.1297 , 162kb)

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arXiv:0812.1387

Date: Sun, 7 Dec 2008 20:06:33 GMT (419kb)

Title: Effective three-body interactions and decoherence of coherent atom

states in optical lattices

Authors: P.R. Johnson, E. Tiesinga, J.V. Porto, C.J. Williams

Categories: quant-ph

Comments: 5 pages, 3 figures

\\

We show that virtual excitations of neutral bosons to higher vibrational

states in a three dimensional optical lattice generate effective attractive

three-body interactions. These processes can quickly decohere non-equilibrium

coherent states held in lattices, and this may explain the surprisingly rapid

damping of collapse and revival oscillations seen in some experiments. Longer

period, secondary revivals associated with the three-body interactions may also

be observable. Using Feshbach resonances it is possible to tune the effective

three-body interaction strength, creating new opportunities for studying the

effects of three-body interactions on the coherence and correlations of both

equilibrium and non-equilibrium many-body states.

\\ ( http://arxiv.org/abs/0812.1387 , 419kb)

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arXiv:0812.1233

Date: Fri, 5 Dec 2008 21:36:57 GMT (279kb)

Title: Ultracold molecules from ultracold atoms: a case study with the KRb

molecule

Authors: Paul S. Julienne

Categories: physics.atom-ph physics.chem-ph

Comments: Paper for the Discussions of the Faraday Society, Number 142: Cold

and Ultracold Molecules, April 15-17, 2009, Durham University, UK

\\

Ultracold collisions of cold atoms or molecules make the bound states of the

collision complex formed from the two colliding species accessible for control

and manipulation of the cold species or the complex. Such resonances are best

treated by a resonant scattering theory, which in the ultracold domain can take

advantage of the properties of the long-range potential and the methods of

multichannel quantum defect theory. Coupled channels calculations on the

threshold scattering states and bound states of the 40K87Rb molecule illustrate

the ideas and methodology of quantum defect theory using the long-range

potential and also demonstrate the spin properties of the bound states

throughout the spectrum.

\\ ( http://arxiv.org/abs/0812.1233 , 279kb)

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arXiv:0812.1386

Date: Sun, 7 Dec 2008 20:07:49 GMT (1792kb)

Title: Two-color modulation transfer spectroscopy

Authors: A. Perez Galvan, D. Sheng, L. A. Orozco and Y. Zhao

Categories: physics.atom-ph

Comments: 14 pages, 13 figures, to be published in the Canadian Journal of

Physics

\\

We present two-color modulation transfer spectroscopy as a tool for precision

studies of atomic properties of excited states. The bi-colored technique

addresses a narrow set of velocity groups of a thermal atomic vapour using a

two-step transition to "burn a hole" in the velocity distribution. The

resulting spectrum presents sub-Doppler linewidths, good signal to noise ratio

and the trademark sidebands that work as an in situ ruler for the energy

spacing between atomic resonances. The spectra obtained can be used for

different applications such as measurements of energy splittings or

stabilization of laser frequencies to excited atomic transitions.

\\ ( http://arxiv.org/abs/0812.1386 , 1792kb)

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arXiv:0812.1487

Date: Mon, 8 Dec 2008 13:41:55 GMT (1301kb,D)

Title: A Stark decelerator on a chip

Authors: Samuel A Meek, Horst Conrad, Gerard Meijer

Categories: physics.atom-ph

Comments: 17 pages, 6 figures

\\

A microstructured array of 1254 electrodes on a substrate has been configured

to generate an array of local minima of electric field strength with a

periodicity of 120 $\mu$m about 25 $\mu$m above the substrate. By applying

sinusoidally varying potentials to the electrodes, these minima can be made to

move smoothly along the array. Polar molecules in low-field seeking quantum

states can be trapped in these traveling potential wells. Recently, we

experimentally demonstrated this by transporting metastable CO molecules at

constant velocities above the substrate [Phys. Rev. Lett. 100 (2008) 153003].

Here, we outline and experimentally demonstrate how this microstructured array

can be used to decelerate polar molecules directly from a molecular beam. For

this, the sinusoidally varying potentials need to be switched on when the

molecules arrive above the chip, their frequency needs to be chirped down in

time, and they need to be switched off before the molecules leave the chip

again. Deceleration of metastable CO molecules from an initial velocity of 360

m/s to a final velocity as low as 240 m/s is demonstrated in the 15-35 mK deep

potential wells above the 5 cm long array of electrodes. This corresponds to a

deceleration of almost $10^5$ $g$, and about 85 cm$^{-1}$ of kinetic energy is

removed from the metastable CO molecules in this process.

\\ ( http://arxiv.org/abs/0812.1487 , 1301kb)

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arXiv:0812.1581

Date: Mon, 8 Dec 2008 22:29:53 GMT (1998kb)

Title: Superconductivity close to the Mott state: From condensed-matter systems

to superfluidity in optical lattices

Authors: Karyn Le Hur and T. Maurice Rice

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

Comments: 95 pages and 18 figures

\\

Since the discovery of high-temperature superconductivity in 1986 by Bednorz

and Mueller, great efforts have been devoted to finding out how and why it

works. From the d-wave symmetry of the order parameter, the importance of

antiferromagnetic fluctuations, and the presence of a mysterious pseudogap

phase close to the Mott state, one can conclude that high-Tc superconductors

are clearly distinguishable from the well-understood BCS superconductors. The

d-wave superconducting state can be understood through a Gutzwiller-type

projected BCS wave-function. In this review article, we revisit the Hubbard

model at half-filling and focus on the emergence of exotic superconductivity

with d-wave symmetry in the vicinity of the Mott state, starting from ladder

systems and then studying the dimensional crossovers to higher dimensions. This

allows to confirm that short-range antiferromagnetic fluctuations can mediate

superconductivity with d-wave symmetry. Ladders are also nice prototype systems

allowing to demonstrate the truncation of the Fermi surface and the emergence

of a Resonating Valence Bond (RVB) state with preformed pairs in the vicinity

of the Mott state. In two dimensions, a similar scenario emerges from

renormalization group arguments. We also discuss theoretical predictions for

the d-wave superconducting phase as well as the pseudogap phase, and address

the crossover to the overdoped regime. Finally, cold atomic systems with

tunable parameters also provide a complementary insight into this outstanding

problem.

\\ ( http://arxiv.org/abs/0812.1581 , 1998kb)

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arXiv:0812.1683

Date: Tue, 9 Dec 2008 13:13:32 GMT (168kb)

Title: Energy landscapes and their relation to thermodynamic phase transitions

Authors: Michael Kastner

Categories: cond-mat.stat-mech

Comments: 9 pages, 2 figures

\\

In order to better understand the occurrence of phase transitions, we adopt

an approach based on the study of energy landscapes: The relation between

stationary points of the potential energy landscape of a classical

many-particle system and the analyticity properties of its thermodynamic

functions is studied for finite as well as infinite systems. For finite

systems, each stationary point is found to cause a nonanalyticity in the

microcanonical entropy, and the functional form of this nonanalytic term can be

derived explicitly. With increasing system size, the order of the nonanalytic

term grows unboundedly, leading to an increasing differentiability of the

entropy. Therefore, in the thermodynamic limit, only asymptotically flat

stationary points may cause a phase transition to take place. For several spin

models, these results are illustrated by predicting the absence or presence of

a phase transition from stationary points and their local curvatures in

microscopic configuration space. These results establish a relationship between

properties of energy landscapes and the occurrence of phase transitions. Such

an approach appears particularly promising for the simultaneous study of

dynamical and thermodynamical properties, as is of interest for example for

protein folding or the glass transition.

\\ ( http://arxiv.org/abs/0812.1683 , 168kb)

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arXiv:0812.1782

Date: Tue, 9 Dec 2008 19:53:12 GMT (218kb)

Title: Relativistic BCS-BEC crossover of a two-species Fermi gas with number

density asymmetry at zero temperature

Authors: Hao Guo, Chih-Chun Chien and Yan He

Categories: cond-mat.other

Comments: 10 pages, 6 figures

\\

We systematically study relativistic two-species fermions with tunable

attractive interactions and number-density asymmetry at zero temperature. In

general, a Bardeen-Cooper-Schrieffer (BCS) - Bose-Einstein Condensation (BEC) -

relativistic BEC (RBEC) crossover is observed. A BCS-type ground state and its

stability are analyzed using two equivalent formalisms. Phase separation in

real space is considered when homogeneous phases become unstable. In the

nonrelativistic limit, our results are consistent with well-known results. In

addition to a BCS-BEC crossover similar to that in the nonrelativistic case, in

the strongly attractive regime gapless excitations of antifermions and a RBEC

state are observed. We address how different phases respond to number density

asymmetry and present predictive phase diagrams of BCS-BEC-RBEC crossover.

\\ ( http://arxiv.org/abs/0812.1782 , 218kb)

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arXiv:0812.1592

Date: Mon, 8 Dec 2008 23:33:13 GMT (227kb)

Title: Interferometry with independent Bose-Einstein condensates: parity as an

EPR/Bell quantum variable

Authors: Franck Lalo\"e (LKB - Lhomond), William Mullin (UMASS)

Categories: quant-ph cond-mat.other

\\

When independent Bose-Einstein condensates (BEC), described quantum

mechanically by Fock (number) states, are sent into interferometers, the

measurement of the output port at which the particles are detected provides a

binary measurement, with two possible results $\pm1$. With two interferometers

and two BEC's, the parity (product of all results obtained at each

interferometer) has all the features of an Einstein-Podolsky-Rosen quantity,

with perfect correlations predicted by quantum mechanics when the settings

(phase shifts of the interferometers) are the same. When they are different,

significant violations of Bell inequalities are obtained. These violations do

not tend to zero when the number $N$ of particles increases, and can therefore

be obtained with arbitrarily large systems, but a condition is that all

particles should be detected. We discuss the general experimental requirements

for observing such effects, the necessary detection of all particles in

correlation, the role of the pixels of the CCD detectors, and that of the

alignments of the interferometers in terms of matching of the wave fronts of

the sources in the detection regions. Another scheme involving three

interferometers and three BEC's is discussed; it leads to Greenberger Horne

Zeilinger (GHZ) sign contradictions, as in the usual GHZ case with three

particles, but for an arbitrarily large number of them. Finally,

generalizations of the Hardy impossibilities to an arbitrarily large number of

particles are introduced. BEC's provide a large versality for observing

violations of local realism in a variety of experimental arrangements.

\\ ( http://arxiv.org/abs/0812.1592 , 227kb)

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arXiv:0812.1606

Date: Tue, 9 Dec 2008 01:58:35 GMT (1336kb)

Title: Ultracold molecules: vehicles to scalable quantum information processing

Authors: Kathy-Anne Brickman Soderberg, Nathan Gemelke, Cheng Chin

Categories: quant-ph cond-mat.other

\\

We describe a novel scheme to implement scalable quantum information

processing using Li-Cs molecular state to entangle $^{6}$Li and $^{133}$Cs

ultracold atoms held in independent optical lattices. The $^{6}$Li atoms will

act as quantum bits to store information, and $^{133}$Cs atoms will serve as

messenger bits that aid in quantum gate operations and mediate entanglement

between distant qubit atoms. Each atomic species is held in a separate optical

lattice and the atoms can be overlapped by translating the lattices with

respect to each other. When the messenger and qubit atoms are overlapped,

targeted single spin operations and entangling operations can be performed by

coupling the atomic states to a molecular state with radio-frequency pulses. By

controlling the frequency and duration of the radio-frequency pulses,

entanglement can either be created or swapped between a qubit messenger pair.

We estimate operation fidelities for entangling two distant qubits and discuss

scalability of this scheme and constraints on the optical lattice lasers.

\\ ( http://arxiv.org/abs/0812.1606 , 1336kb)

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arXiv:0812.1725

Date: Tue, 9 Dec 2008 16:08:03 GMT (819kb)

Title: Jahn-Teller induced Berry phase in spin-orbit coupled Bose-Einstein

condensates

Authors: Jonas Larson and Erik Sjoqvist

Categories: quant-ph

Comments: 8 pages, 6 figures

\\

We demonstrate that Berry phases may greatly affect the dynamics of

spin-orbit coupled Bose-Einstein condensates. The effective model Hamiltonian

under consideration is shown to be equivalent to the Exe Jahn-Teller model

first introduced in molecular physics. The corresponding conical intersection

is identified and the Berry phase acquired for a wave packet encircling the

intersection studied. It is found that this phase manifests itself in the

density profile of the condensate, making it a directly measurable quantity via

time-of-flight detection. Moreover, the non-Abelian gauge structure of the

system is addressed and we verify how it affects the dynamics.

\\ ( http://arxiv.org/abs/0812.1725 , 819kb)

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arXiv:0812.1838

Date: Wed, 10 Dec 2008 03:42:36 GMT (119kb)

Title: Collective excitations and instabilities in multi-layer stacks of

dipolar condensates

Authors: Daw-Wei Wang, and Eugene Demler

Categories: cond-mat.other cond-mat.supr-con

Comments: 5 pages with 3 figures

\\

We analyze theoretically the collective mode dispersion in multi-layer stacks

of two dimensional dipolar condensates and find a strong enhancement of the

roton instability. We discuss the interplay between the dynamical instability

and roton softening for moving condensates. We use our results to analyze the

decoherence rate of Bloch oscillations for systems in which the s-wave

scattering length is tuned close to zero using Feshbach resonance. Our results

are in qualitative agreement with recent experiments of Fattori {\it et al.} on

$^{39}$K atoms.

\\ ( http://arxiv.org/abs/0812.1838 , 119kb)

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\\

arXiv:0812.1926

Date: Wed, 10 Dec 2008 14:50:35 GMT (388kb)

Title: The Stochastic Gross-Pitaevskii Equation and some Applications

Authors: S. P. Cockburn, N. P. Proukakis

Categories: cond-mat.other

Comments: 14 pages, 9 figures. To appear in the Laser Physics Special Issue on

Physics of Cold Trapped Atoms

\\

The stochastic Gross-Pitaevskii equation represents a versatile approach for

studying the dynamics of trapped degenerate ultracold Bose gases in the

presence of large phase and density fluctuations. Following a brief review of

the original formulation of Stoof, which highlights the benefits of this

approach and its relation to alternative theories, we present selected

applications for the dynamics of effectively one-dimensional systems, and

briefly discuss the generalization to two-dimensional systems, highlighting

certain potential pitfalls in their numerical implementations.

\\ ( http://arxiv.org/abs/0812.1926 , 388kb)

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\\

arXiv:0812.1928

Date: Wed, 10 Dec 2008 14:53:16 GMT (486kb,D)

Title: Quantum quenches from integrability: the fermionic pairing model

Authors: Alexandre Faribault, Pasquale Calabrese, Jean-Sebastien Caux

Categories: cond-mat.str-el cond-mat.mes-hall

Comments: 10 pages, 7 figures

\\

Understanding the non-equilibrium dynamics of extended quantum systems after

the trigger of a sudden, global perturbation (quench) represents a daunting

challenge, especially in the presence of interactions. The main difficulties

stem from both the vanishing time scale of the quench event, which can thus

create arbitrarily high energy modes, and its non-local nature, which curtails

the utility of local excitation bases. We here show that nonperturbative

methods based on integrability can prove sufficiently powerful to completely

characterize quantum quenches: we illustrate this using a model of fermions

with pairing interactions (Richardson's model). The effects of simple (and

multiple) quenches on the dynamics of various important observables are

discussed. Many of the features we find are expected to be universal to all

kinds of quench situations in atomic physics and condensed matter.

\\ ( http://arxiv.org/abs/0812.1928 , 486kb)

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\\

arXiv:0812.1977

Date: Wed, 10 Dec 2008 17:30:00 GMT (597kb)

Title: Kinetic quantum phase transition in bosonic superfluids on a lattice

Authors: A. S. Alexandrov and I. O. Thomas

Categories: cond-mat.other

Comments: 4 pages, 3 figures. Submitted to Physical Review Letters

\\

It has long been known that quantum fluctuations induce a macroscopic phase

transition from a superfluid to a Mott insulator phase driven by the repulsive

potential energy in the ground state of bosons on a lattice as observed in

ultracold atomic gases on optical lattices (M. Grenier {\em et al.}, Nature,

{\bf 415,} 39 (2002)). Identifying the superfluid phase is often hard due to

the lack of clear criteria (R. B. Diener {\em et al.}, Phys. Rev. Lett. {\bf

98}, 180404 (2007); Y. Kato {\em et al.} Nature Phys. {\bf 4}, 617 (2008)). We

find a quantum phase transition from a homogeneous to a striped or checkerboard

Bose-condensate driven purely by the kinetic energy which provides a clear

identification of the superfluid state, and which may perhaps be reproduced

experimentally in optical lattices by the appropriate tuning of the lattice

potential.

\\ ( http://arxiv.org/abs/0812.1977 , 597kb)

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\\

arXiv:0812.1987

Date: Wed, 10 Dec 2008 18:00:10 GMT (69kb)

Title: Quantum phase transition in Bose-Holstein model in two dimensions

Authors: Sanjoy Datta and Sudhakar Yarlagadda

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

\\

We derive an effective d-dimensional Hamiltonian for a system of

hard-core-bosons coupled to optical phonons in a lattice. Away from

half-filling, we show that the presence of next-nearest-neighbor hopping in the

effective Hamiltonian leads to a superfluid-to-supersolid transition at

intermediate boson-phonon (b-p) couplings, while at strong-couplings the system

phase separates. However, at half-filling and at a critical b-p coupling (as in

the xxz-model), the system undergoes a superfluid-to-charge-density-wave

transition without any signature of supersolidity. Our analyses is based on

extensive calculations of the structure factor, the superfluid fraction, the

Bose-Einstein condensate fraction, and the system energy at various fillings.

We present a phase diagram for this system and compare it to that of the

xxz-model. We also demonstrate explicitly that the next-nearest-neighbor

hopping (in the absence of nearest-neighbor hopping) in the effective

Hamiltonian leads only to a single transition, i.e., a first-order

superfluid-to-supersolid transition.

\\ ( http://arxiv.org/abs/0812.1987 , 69kb)

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\\

arXiv:0812.1997

Date: Wed, 10 Dec 2008 18:44:32 GMT (117kb)

Title: Exploring dynamic localization with a Bose-Einstein condensate

Authors: Andre Eckardt, Martin Holthaus, Hans Lignier, Alessandro Zenesini,

Donatella Ciampini, Oliver Morsch, and Ennio Arimondo

Categories: cond-mat.other

Comments: 7 pages, 5 figures accepted for publication in Phys. Rev. A

\\

We report on the experimental observation of dynamic localization of a

Bose-Einstein condensate in a shaken optical lattice, both for sinusoidal and

square-wave forcing. The formulation of this effect in terms of a quasienergy

band collapse, backed by the excellent agreement of the observed collapse

points with the theoretical predictions, suggests the feasibility of systematic

quasienergy band engineering.

\\ ( http://arxiv.org/abs/0812.1997 , 117kb)

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\\

arXiv:0812.1914

Date: Wed, 10 Dec 2008 13:47:09 GMT (370kb)

Title: Dynamics of thermal Casimir-Polder forces on polar molecules

Authors: S.A. Ellingsen, S.Y. Buhmann, S. Scheel

Categories: quant-ph

Comments: 5 pages, 3 figures

\\

We study the influence of thermal Casimir-Polder forces on the near-surface

trapping of cold polar molecules, with emphasis on LiH and YbF near an Au

surface at room temperature. We show that for a molecule initially prepared in

its electronic and rovibrational ground state, the Casimir-Polder force

oscillates with the molecule-wall separation. The non-resonant force

contribution and the evanescent part of the resonant force contribution almost

exactly cancel at high temperature which results in a saturation of the

(attractive) force in this limit. A dynamical calculation reveals how the

spatial oscillations die out as thermalisation of the molecule with its

environment sets in.

\\ ( http://arxiv.org/abs/0812.1914 , 370kb)

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\\

arXiv:0812.1941

Date: Wed, 10 Dec 2008 15:59:24 GMT (32kb)

Title: Zero-mode analysis of quantum statistical physics

Authors: A. Bessa, C.A.A. de Carvalho, E.S. Fraga

Categories: quant-ph

Comments: 9 pages, 5 figures

\\

We present a unified formulation for quantum statistical physics based on the

representation of the density matrix as a functional integral. We identify the

stochastic variable of the effective statistical theory that we derive as a

boundary configuration and a zero mode relevant to the discussion of infrared

physics. We illustrate our formulation by computing the partition function of

an interacting one-dimensional quantum mechanical system at finite temperature

from the path-integral representation for the density matrix. The method of

calculation provides an alternative to the usual sum over periodic

trajectories: it sums over paths with coincident endpoints, and includes

non-vanishing boundary terms. An appropriately modified expansion into

Matsubara modes provides a natural separation of the zero-mode physics. This

feature may be useful in the treatment of infrared divergences that plague the

perturbative approach in thermal field theory.

\\ ( http://arxiv.org/abs/0812.1941 , 32kb)

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\\

arXiv:0812.2231

Date: Thu, 11 Dec 2008 20:36:33 GMT (2753kb)

Title: Supersolid state in fermionic optical lattice systems

Authors: Akihisa Koga, Takuji Higashiyama, Kensuke Inaba, Seiichiro Suga, and

Norio Kawakami

Categories: cond-mat.supr-con

Comments: 7 pages, 5 figures, Phys. Rev. A in press

\\

We study ultracold fermionic atoms trapped in an optical lattice with

harmonic confinement by combining the real-space dynamical mean-field theory

with a two-site impurity solver. By calculating the local particle density and

the pair potential in the systems with different clusters, we discuss the

stability of a supersolid state, where an s-wave superfluid coexists with a

density-wave state of checkerboard pattern. It is clarified that a confining

potential plays an essential role in stabilizing the supersolid state. The

phase diagrams are obtained for several effective particle densities.

\\ ( http://arxiv.org/abs/0812.2231 , 2753kb)

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\\

arXiv:0812.2212

Date: Thu, 11 Dec 2008 18:27:56 GMT (370kb)

Title: Intense Atomic and Molecular Beams via Neon Buffer Gas Cooling

Authors: David Patterson, Julia Rasmussen and John M. Doyle

Categories: physics.atom-ph

Comments: 15 pages, 6 figures

\\

We realize a continuous guided beam of cold deuterated ammonia with a flux of

3e11 ND3 molecules/s and a continuous free-space beam of cold potassium with a

flux of 1e16 K atoms/s. A novel feature of the buffer gas source used to

produce these beams is cold neon, which, due to intermediate Knudsen number

beam dynamics, produces a forward velocity and low-energy tail that is

comparable to much colder helium-based sources. We expect this source to be

trivially generalizable to a very wide range of atomic and molecular species

with significant vapor pressure below 1000 K. This source has properties that

make it a good starting point for laser cooling of molecules or atoms, cold

collision studies, trapping, or nonlinear optics in buffer-gas-cooled atomic or

molecular gases.

\\ ( http://arxiv.org/abs/0812.2212 , 370kb)

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\\

arXiv:0812.2087

Date: Thu, 11 Dec 2008 06:32:05 GMT (1195kb)

Title: A dynamic scheme for generating number squeezing in Bose-Einstein

condensates through nonlinear interactions

Authors: S. A. Haine and M. T. Johnsson

Categories: quant-ph

Comments: 4 pages, 3 figures

\\

We develop a scheme to generate number squeezing in a Bose-Einstein

condensate by utilizing interference between two hyperfine levels and nonlinear

atomic interactions. We describe the scheme using a multimode quantum field

model and find agreement with a simple analytic model in certain regimes. We

demonstrate that the scheme gives strong squeezing for realistic choices of

parameters and atomic species. The number squeezing can result in noise well

below the quantum limit, even if the initial noise on the system is classical

and much greater than that of a poisson distribution.

\\ ( http://arxiv.org/abs/0812.2087 , 1195kb)

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\\

arXiv:0812.1924 (*cross-listing*)

Date: Wed, 10 Dec 2008 14:18:09 GMT (611kb,D)

Title: Stabilization of two-dimensional solitons and vortices against

supercritical collapse by lattice potentials

Authors: Rodislav Driben and Boris A. Malomed

Categories: nlin.PS physics.optics

Comments: European Physical Journal D, in press

\\

It is known that optical-lattice (OL) potentials can stabilize solitons and

solitary vortices against the critical collapse, generated by the cubic

attractive nonlinearity in the 2D geometry. We demonstrate OLs can also

stabilize various species of fundamental and vortical solitons against the

super-critical collapse, driven by the double-attractive cubic-quintic

nonlinearity (however, solitons remain unstable in the case of the pure quintic

nonlinearity). Two types of OLs are considered, producing similar results: the

2D Kronig-Penney "checkerboard", and the sinusoidal potential. Soliton families

are obtained by means of a variational approximation, and as numerical

solutions. The stability of the families, which include fundamental and

multi-humped solitons, vortices of oblique and straight types, vortices built

of quadrupoles, and supervortices, strictly obeys the Vakhitov-Kolokolov

criterion. The model applies to optical media and BEC in "pancake" traps.

\\ ( http://arxiv.org/abs/0812.1924 , 611kb)

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The replacements:

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\\

arXiv:0801.1257

replaced with revised version Thu, 4 Dec 2008 22:10:08 GMT (698kb)

Title: Third quantization: a general method to solve master equations for

quadratic open Fermi systems

Authors: Tomaz Prosen

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

Comments: 24 pages, with 8 eps figures - few minor corrections to the published

version, e.g. anti-symmetrizing the matrix given by eq. (27)

Journal-ref: New J. Phys. 10, 043026 (2008)

\\ ( http://arxiv.org/abs/0801.1257 , 698kb)

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\\

arXiv:0810.5745

replaced with revised version Fri, 5 Dec 2008 20:50:49 GMT (7kb)

Title: Observation of the Nuclear Magnetic Octupole Moment of 87Rb from

Spectroscopic Measurements of Hyperfine Intervals

Authors: Vladislav Gerginov, Carol E. Tanner and W. R. Johnson

Categories: physics.atom-ph

\\ ( http://arxiv.org/abs/0810.5745 , 7kb)

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\\

arXiv:0812.0231

replaced with revised version Fri, 5 Dec 2008 13:12:42 GMT (58kb)

Title: Measurement of the quadratic Zeeman shift of ^{85}Rb hyperfine sublevels

using stimulated Raman transitions

Authors: Runbing Li, Lin Zhou, Jin Wang, Mingsheng Zhan

Categories: physics.atom-ph

\\ ( http://arxiv.org/abs/0812.0231 , 58kb)

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\\

arXiv:0804.3364

replaced with revised version Mon, 8 Dec 2008 20:42:38 GMT (42kb)

Title: A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase

Authors: Aurel Bulgac and Michael McNeil Forbes

Categories: cond-mat.supr-con hep-ph nucl-th

Comments: 4 pages, 3 figures, RevTeX4. (Minor updates to correspond with

published version.)

Report-no: NG-0809

Journal-ref: Phys. Rev. Lett. 101 (2008) 215301

DOI: 10.1103/PhysRevLett.101.215301

\\ ( http://arxiv.org/abs/0804.3364 , 42kb)

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\\

arXiv:0805.4295

replaced with revised version Mon, 8 Dec 2008 17:23:45 GMT (222kb)

Title: Probing Fermionic Condensates by Fast-Sweep Projection onto Feshbach

Molecules

Authors: S. Matyjaskiewicz, M. H. Szymanska, K. Goral

Categories: cond-mat.other

Comments: 4 pages, 3 figures, revised version

Journal-ref: Phys. Rev. Lett. 101, 150410 (2008)

DOI: 10.1103/PhysRevLett.101.150410

\\ ( http://arxiv.org/abs/0805.4295 , 222kb)

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\\

arXiv:0806.1777

replaced with revised version Mon, 8 Dec 2008 01:41:25 GMT (204kb)

Title: Spin echo in spinor dipolar Bose-Einstein condensates

Authors: Masashi Yasunaga and Makoto Tsubota

Categories: cond-mat.other

Comments: 4 pages, 5 figures

Journal-ref: Phys. Rev. Lett. 101, 220401 (2008)

\\ ( http://arxiv.org/abs/0806.1777 , 204kb)

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\\

arXiv:0811.4515

replaced with revised version Mon, 8 Dec 2008 04:40:14 GMT (53kb)

Title: Phases and collective modes of hardcore Bose-Fermi mixture in an optical

lattice

Authors: S. Sinha and K. Sengupta

Categories: cond-mat.str-el

Comments: 10 pages 6 Figs v2: Updated version with more refs and additional

discussions

\\ ( http://arxiv.org/abs/0811.4515 , 53kb)

------------------------------------------------------------------------------\\

arXiv:0808.1450

replaced with revised version Fri, 5 Dec 2008 21:32:46 GMT (22kb)

Title: Hypothesis testing for Gaussian states on bosonic lattices

Authors: Milan Mosonyi

Categories: quant-ph math-ph math.MP

Comments: 22 pages, submitted version

\\ ( http://arxiv.org/abs/0808.1450 , 22kb)

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\\

arXiv:0810.4317

replaced with revised version Mon, 8 Dec 2008 20:51:40 GMT (311kb)

Title: Gaussian wave packets in phase space: The Fermi g_F function

Authors: Giuliano Benenti, Giuliano Strini

Categories: quant-ph

Comments: 7 pages, 4 figures, remarks added

\\ ( http://arxiv.org/abs/0810.4317 , 311kb)

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\\

arXiv:0810.0600

replaced with revised version Tue, 9 Dec 2008 11:14:48 GMT (2450kb,D)

Title: Squeezing and entanglement in a Bose-Einstein condensate

Authors: J. Esteve, C. Gross, A. Weller, S. Giovanazzi, M.K. Oberthaler

(Kirchhoff Institut f\"ur Physik, Heidelberg, Germany)

Categories: cond-mat.other quant-ph

DOI: 10.1038/nature07332

\\ ( http://arxiv.org/abs/0810.0600 , 2450kb)

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\\

arXiv:0810.3763

replaced with revised version Tue, 9 Dec 2008 14:47:13 GMT (60kb)

Title: Feshbach-Einstein condensates

Authors: Valy G. Rousseau, Peter J.H. Denteneer

Categories: cond-mat.stat-mech

Comments: 4 pages, 6 figures

\\ ( http://arxiv.org/abs/0810.3763 , 60kb)

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\\

arXiv:0802.4055

replaced with revised version Tue, 9 Dec 2008 12:48:15 GMT (265kb)

Title: Bifurcations, order, and chaos in the Bose-Einstein condensation of

dipolar gases

Authors: Patrick K\"oberle, Holger Cartarius, Toma\v{z} Fab\v{c}i\v{c}, J\"org

Main, G\"unter Wunner

Categories: quant-ph nlin.CD

Comments: 10 pages, 4 figures, minor changes in the text and additional

reference added

\\ ( http://arxiv.org/abs/0802.4055 , 265kb)

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\\

arXiv:0812.1709 (*cross-listing*)

Date: Tue, 9 Dec 2008 14:58:23 GMT (41kb)

Title: Many Body Theory for Quartets, Trions, and Pairs in Low Density

Multi-Component Fermi-Systems

Authors: P. Schuck, T. Sogo, and G. R\"opke

Categories: nucl-th cond-mat.other

\\

A selfconsistent many body approach for the description of gases with

quartets, trions, and pairs is presented. Applications to 3D Fermi systems at

low density are discussed.

\\ ( http://arxiv.org/abs/0812.1709 , 41kb)

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\\

arXiv:0807.0078

replaced with revised version Wed, 10 Dec 2008 09:16:57 GMT (74kb)

Title: Number of closed-channel molecules in the BEC-BCS crossover

Authors: Felix Werner (LKB - Lhomond), Leticia Tarruell (LKB - Lhomond), Yvan

Castin (LKB - Lhomond)

Categories: cond-mat.other

\\ ( http://arxiv.org/abs/0807.0078 , 74kb)

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\\

arXiv:0807.3627

replaced with revised version Wed, 10 Dec 2008 17:54:13 GMT (15kb)

Title: Tunneling-induced damping of phase coherence revivals in deep optical

lattices

Authors: Uwe R. Fischer and Ralf Sch\"utzhold

Categories: cond-mat.other quant-ph

Comments: 4+epsilon pages of RevTex4; Rapid Communication in Physical Review A

Journal-ref: Phys. Rev. A 78, 061603(R) (2008)

DOI: 10.1103/PhysRevA.78.061603

\\ ( http://arxiv.org/abs/0807.3627 , 15kb)

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\\

arXiv:0811.2798

replaced with revised version Wed, 10 Dec 2008 04:23:07 GMT (614kb)

Title: Probing condensate order in deep optical lattices

Authors: Kuei Sun, Courtney Lannert, Smitha Vishveshwara

Categories: cond-mat.other

Comments: 14 pages, 9 figures, RevTeX; content changed, references added

\\ ( http://arxiv.org/abs/0811.2798 , 614kb)

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\\

arXiv:0804.3005

replaced with revised version Wed, 10 Dec 2008 09:57:10 GMT (54kb)

Title: Establishing EPR-channels between Nanomechanics and Atomic Ensembles

Authors: K. Hammerer, M. Aspelmeyer, E.S. Polzik, P. Zoller

Categories: quant-ph

Comments: 4 pages, 1 figure; accepted by PRL

\\ ( http://arxiv.org/abs/0804.3005 , 54kb)

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\\

arXiv:0810.3928

replaced with revised version Wed, 10 Dec 2008 01:20:39 GMT (735kb)

Title: Nuclear quadrupole resonances in compact vapor cells: the crossover from

the NMR to the NQR interaction regimes

Authors: E.A. Donley, J.L. Long, T.C. Liebisch, E.R. Hodby, T.A. Fisher, and J.

Kitching

Categories: quant-ph

Comments: 4 pages, 4 figures

\\ ( http://arxiv.org/abs/0810.3928 , 735kb)

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\\

arXiv:0806.0419

replaced with revised version Thu, 11 Dec 2008 19:24:33 GMT (39kb)

Title: Odd-frequency pairing in a binary mixture of bosonic and fermionic cold

atoms

Authors: Ryan M. Kalas, Alexander V. Balatsky, Dmitry Mozyrsky

Categories: cond-mat.other

Comments: Final version

Journal-ref: Phys. Rev. B 78, 184513 (2008)

DOI: 10.1103/PhysRevB.78.184513

\\ ( http://arxiv.org/abs/0806.0419 , 39kb)

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\\

arXiv:0807.0002

replaced with revised version Thu, 11 Dec 2008 08:49:00 GMT (46kb)

Title: Superfluidity near phase separation in Bose-Fermi mixtures

Authors: Tilman Enss, Wilhelm Zwerger

Categories: cond-mat.other cond-mat.supr-con

Comments: 7 pages and 3 figures, accepted version

\\ ( http://arxiv.org/abs/0807.0002 , 46kb)

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\\

arXiv:0809.0312

replaced with revised version Thu, 11 Dec 2008 16:11:49 GMT (182kb)

Title: Probing spatial spin correlations of ultracold gases by quantum noise

spectroscopy

Authors: G. M. Bruun, Brian M. Andersen, Eugene Demler and Anders S.

S{\o}rensen

Categories: cond-mat.other

Comments: Revised version. 4 pages, 3 figures. Accepted for PRL

\\ ( http://arxiv.org/abs/0809.0312 , 182kb)

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\\

arXiv:0809.1422

replaced with revised version Thu, 11 Dec 2008 11:31:50 GMT (380kb)

Title: Quantum phases of a Two-Dimensional Dipolar Fermi Gas

Authors: G. M. Bruun and E. Taylor

Categories: cond-mat.other

Comments: 4 pages, 4 figures

Journal-ref: Phys. Rev. Lett. 101, 245301 (2008)

DOI: 10.1103/PhysRevLett.101.245301

\\ ( http://arxiv.org/abs/0809.1422 , 380kb)

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\\

arXiv:0806.3062

replaced with revised version Tue, 9 Dec 2008 15:50:17 GMT (865kb,D)

Title: Dimer-dimer collisions at finite energies in two-component Fermi gases

Authors: J. P. D'Incao, Seth T. Rittenhouse, N. P. Mehta, Chris H. Greene

Categories: physics.atom-ph

Comments: 4.1 pages, 3 figures, revised text

\\ ( http://arxiv.org/abs/0806.3062 , 865kb)

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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 =========================================================================Received on Mon Jan 12 2009 - 10:24:32 EST

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