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

Date: Mon, 18 May 2009 20:33:13 +1000

Date: Mon, 18 May 2009 20:33:13 +1000

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

Dear subscribers,

I'm sure it has been apparent to you that I have not been catching up like I was

hoping. In the realisation of this fact I have enlisted the help of some of the

rest of the group at the University of Queensland. They have done an excellent

job, and I expect to be up to speed by the end of the week.

This email has been sitting half completed on my computer for a couple of weeks

: it feels great to get it out the door. There were 23 new preprints and 14

replacements:

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arXiv:0902.0984

Date: Fri, 6 Feb 2009 19:56:03 GMT (25kb)

Title: Multiband superfluidity and superfluid to band-insulator transition of

strongly interacting fermions in an optical lattice

Authors: A.A. Burkov, Arun Paramekanti

Categories: cond-mat.other

Comments: 5 pages, 2 figures

\\

We study the multiband superfluid and the superfluid (SF) to band insulator

(BI) transition of strongly interacting fermionic atoms in an optical lattice

at a filling of two fermions per well. We present physical arguments to show

that a consistent mean field description of this problem is obtained by

retaining only intraband pairing between the fermions. Using this approach we

obtain a reasonable account of the experimentally observed critical lattice

depth for the SF-BI transition and the modulated components of the condensate

density, and make predictions for the lattice depth dependence of the

quasiparticle gap which can be tested in future experiments. We also highlight

some interesting features unique to cold atom superfluids within this intraband

pairing approximation; for instance, the pair field is forced to be uniform in

space and the Hartree field vanishes identically. These arise as a result of

the fact that while the pairing interaction is cut off at the scale of the

Debye frequency in conventional superconductors, or at the lattice scale in

tight binding model Hamiltonians, such a cutoff is absent for cold Fermi gases.

\\ ( http://arxiv.org/abs/0902.0984 , 25kb)

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arXiv:0902.1021

Date: Fri, 6 Feb 2009 07:02:03 GMT (143kb)

Title: Spin and mass imbalance in a mixture of two species of fermionic atoms

in a 1D optical lattice

Authors: Wen-Long Lu, Zhi-Guo Wang, Shi-Jian Gu, and Hai-Qing Lin

Categories: cond-mat.str-el

Comments: 6 pages, 7 figures

\\

In this paper, we study the role of both "spin"(species) and mass imbalance

in a mixture of two species of fermionic atoms with attractive interaction in

an one-dimensional optical lattice. Using the bosonization approach, quantum

phase transitions between a liquid phase and phase separated states are studied

under various conditions of interaction, spin imbalance, and mass imbalance. We

find that, in the phase-separated region, there exists two kinds of phase

separation and a special quantum phase transition might exist between them in

the large $U$ limit. On the other hand, the singlet superconducting correlation

dominates in the liquid phase. The pairing behavior has been also demonstrated

that there is oscillating behavior in real space. We find both the spin and

mass imbalance are in favor of the formation of

Fulde-Ferrell-Larkin-Ovchinnikov state.

\\ ( http://arxiv.org/abs/0902.1021 , 143kb)

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arXiv:0902.1117

Date: Fri, 6 Feb 2009 15:26:03 GMT (129kb)

Title: Breakdown of adiabaticity when loading ultra-cold atoms in optical

lattices

Authors: Jakub Zakrzewski, Dominique Delande

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

Comments: 4pp, 3 figs

\\

Realistic simulations of current ultra-cold atoms experiments in optical

lattices show that the ramping up of the optical lattice is significantly

nonadiabatic, implying that experimentally prepared Mott insulators are not

really in the ground state of the atomic system. The nonadiabaticity is even

larger in the presence of a secondary quasi-periodic lattice simulating

"disorder". Alternative ramping schemes are suggested that improve the

adiabaticity when the disorder is not too large.

\\ ( http://arxiv.org/abs/0902.1117 , 129kb)

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arXiv:0902.1069

Date: Fri, 6 Feb 2009 11:31:47 GMT (502kb)

Title: Dilute gas of ultracold two-level atoms inside a cavity; generalized

Dicke model

Authors: Jonas Larson, Maciej Lewenstein

Categories: quant-ph

Comments: 10 pages, 7 figures

\\

We consider a gas of ultracold two-level atoms confined in a cavity, taking

into account for atomic center-of-mass motion and cavity mode variations. By

means of the generalized Dicke model, the cases of a Gaussian or a standing

wave mode shape are considered separately. In both situations, the

phase-diagrams exhibit novel features compared to the regular Dicke model, for

example existence of first and second order phase transitions between the

normal and the superradient phases. Furthermore, the number of bound states in

the Gaussian mode profile turns out to play a crucial rule for the

thermodynamical properties.

\\ ( http://arxiv.org/abs/0902.1069 , 502kb)

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arXiv:0902.1017

Date: Fri, 6 Feb 2009 06:47:44 GMT (752kb)

Title: Lattice Thermodynamics for Ultra-Cold Atoms

Authors: D. McKay, M. White and B. DeMarco

Categories: physics.atom-ph

Comments: 10 pages, 6 figures

\\

We measure the temperature of ultra-cold Rb-87 gases transferred into an

optical lattice and compare to non-interacting thermodynamics for a combined

lattice--parabolic potential. Absolute temperature is determined at low

temperature by fitting quasimomentum distributions obtained using bandmapping,

i.e., turning off the lattice potential slowly compared with the bandgap. We

show that distributions obtained at high temperature employing this technique

are not quasimomentum distributions through numerical simulations. To overcome

this limitation, we extract temperature using the in-trap size of the gas.

\\ ( http://arxiv.org/abs/0902.1017 , 752kb)

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arXiv:0902.1231

Date: Sat, 7 Feb 2009 10:24:06 GMT (50kb)

Title: Quantum stirring as a sensitive probe of 1D superfluidity

Authors: R. Citro, A. Minguzzi, F.W.J. Hekking

Categories: cond-mat.mes-hall

Comments: 4 pages, 2 figures

\\

We propose quantum stirring with a laser beam as a probe of superfluid

behavior for a strongly interacting one-dimensional Bose gas confined to a

ring. Within the Luttinger liquid theory framework, we calculate the fraction

of stirred particles per period as a function of the stirring velocity, the

interaction strength and the coupling between the stirring beam and the bosons.

The fraction of stirred particles allows to probe superfluidity of the system.

We find that it crosses over at a critical velocity, lower than the sound one,

from a characteristic power law at high velocities to a constant at low

velocities. Some experimental issues on quantum stirring in ring-trapped

condensates are discussed.

\\ ( http://arxiv.org/abs/0902.1231 , 50kb)

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arXiv:0902.1317

Date: Sun, 8 Feb 2009 16:07:32 GMT (136kb)

Title: Stationary wave patterns generated by an impurity moving with supersonic

velocity through a Bose-Einstein condensate

Authors: T. L. Horng, S. C. Gou, T. C. Lin, G. A. El, A. P. Itin, A. M.

Kamchatnov

Categories: cond-mat.other

Comments: 7 pages, 3 figures

\\

Formation of stationary 3D wave patterns generated by a small point-like

impurity moving through a Bose-Einstein condensate with supersonic velocity is

studied. Asymptotic formulae for a stationary far-field density distribution

are obtained. Comparison with three-dimensional numerical simulations

demonstrates that these formulae are accurate enough already at distances from

the obstacle equal to a few wavelengths.

\\ ( http://arxiv.org/abs/0902.1317 , 136kb)

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arXiv:0902.1353

Date: Mon, 9 Feb 2009 01:24:36 GMT (45kb)

Title: Pumping vortex into a Bose-Einstein condensate of heteronuclear

molecules

Authors: Z. F. Xu, R. Q. Wang, and L. You

Categories: cond-mat.other

Comments: 10 pages, 2 figures

\\

Heteronuclear molecules attract wide attention due to their permanent

electric dipole moments. Analogous to atoms with magnetic dipoles, the

existence of nonzero electric dipoles significantly enhance possibilities and

mechanisms for control and design of quantum degenerate molecule systems with

electric (E-) fields. This work proposes a vortex creation mechanism inside a

condensate of heteronuclear molecules through the adiabatic flipping of the

axial bias of an analogous E-field Ioffe-Pritchard trap (IPT), extending the

original protocol due to Ishoshima, {\it et al.}, [Phys. Rev. A \textbf{61},

063610 (2000)] for an atomic spinor condensate inside a magnetic (B-) field

IPT. We provide both analytic proof and numerical simulations to illustrate the

high fidelity operation of this vortex pump protocol. We hope our work provides

stimulating experimental possibilities for the active investigations in quantum

degenerate molecule systems.

\\ ( http://arxiv.org/abs/0902.1353 , 45kb)

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arXiv:0902.1450

Date: Mon, 9 Feb 2009 15:05:12 GMT (112kb,D)

Title: Unconventional pairing phases in the two-dimensional attractive Hubbard

model with population imbalance

Authors: Stefan M.A. Rombouts

Categories: cond-mat.str-el

Comments: 3 figures

\\

The ground state phase diagram of the two-dimensional attractive Hubbard

model with population imbalance is explored using a mean field ansatz. A linear

programming algorithm is used to identify the blocked states, such that the

population imbalance can be imposed exactly. This allows to explore regions of

the number-projected phase diagram that can not be obtained with the

conventional Bogoliubov-de Gennes ansatz. The Fulde-Ferrel-Larkin-Ovchinnikov

(FFLO) phase of pairs with non-zero momentum is found to be the ground state

over a wide range of parameters, while phase separation occurs only in a

limited region at small population imbalance. Through a particle-hole

transformation these results can be related to the underdoped repulsive Hubbard

model, where the FFLO phase takes the form of a particle-hole condensate that

exhibits a spontaneous restoration of spin symmetry.

\\ ( http://arxiv.org/abs/0902.1450 , 112kb)

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arXiv:0902.1428

Date: Mon, 9 Feb 2009 12:46:28 GMT (395kb)

Title: High-efficiency cluster-state generation with atomic ensembles via the

dipole-blockade mechanism

Authors: Marcin Zwierz and Pieter Kok

Categories: quant-ph

Comments: 10 pages with 8 figures, extended version of arXiv:0807.3645

Journal-ref: Phys. Rev. A 79, 022304 (2009)

DOI: 10.1103/PhysRevA.79.022304

\\

We demonstrate theoretically a scheme for cluster state generation, based on

atomic ensembles and the dipole blockade mechanism. In the protocol, atomic

ensembles serve as single qubit systems. Therefore, we review single-qubit

operations on qubit defined as collective states of atomic ensemble. Our

entangling protocol requires nearly identical single-photon sources, one

ultra-cold ensemble per physical qubit, and regular photodetectors. The general

entangling procedure is presented, as well as a procedure that generates in a

single step Q-qubit GHZ states with success probability p_success ~ eta^{Q/2},

where eta is the combined detection and source efficiency. This is

significantly more efficient than any known robust probabilistic entangling

operation. GHZ states form the basic building block for universal cluster

states, a resource for the one-way quantum computer.

\\ ( http://arxiv.org/abs/0902.1428 , 395kb)

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arXiv:0902.1430

Date: Mon, 9 Feb 2009 12:49:24 GMT (464kb)

Title: Modulation-free pump-probe spectroscopy of strontium atoms

Authors: C. Javaux, I. G. Hughes, G. Lochead, J. Millen and M. P. A. Jones

Categories: physics.atom-ph physics.optics

Comments: 7 pages, 5 figures

\\

We have performed polarization spectroscopy and sub-Doppler DAVLL on the

(5s5s) 1^S_0 -> (5s5p) 1^P_1 transition of atomic strontium. Both techniques

generated a dispersion-type lineshape suitable for laser stabilization, without

the need for frequency modulation. In both cases the signal is generated

primarily by saturation effects, rather than optical pumping. The dependence of

the amplitude and gradient on intensity and magnetic field were also

investigated.

\\ ( http://arxiv.org/abs/0902.1430 , 464kb)

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arXiv:0902.1499

Date: Mon, 9 Feb 2009 19:52:44 GMT (2719kb)

Title: High-energy-resolution molecular beams for cold collision studies

Authors: L. P. Parazzoli, N. Fitch, D. S. Lobser, and H. J. Lewandowski

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

Comments: 12 pages, 9 figures

\\

Stark deceleration allows for precise control over the velocity of a pulsed

molecular beam and, by the nature of its limited phase-space acceptance,

reduces the energy width of the decelerated packet. We describe an alternate

method of operating a Stark decelerator that further reduces the energy spread

over the standard method of operation. In this alternate mode of operation, we

aggressively decelerate the molecular packet using a high phase angle. This

technique brings the molecular packet to the desired velocity before it reaches

the end of the decelerator; the remaining stages are then used to

longitudinally and transversely guide the packet to the detection/interaction

region. The result of the initial aggressive slowing is a reduction in the

phase-space acceptance of the decelerator and thus a narrowing of the velocity

spread of the molecular packet. In addition to the narrower energy spread, this

method also results in a velocity spread that is nearly independent of the

final velocity. Using the alternate deceleration technique, the energy

resolution of molecular collision measurements can be improved considerably.

\\ ( http://arxiv.org/abs/0902.1499 , 2719kb)

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arXiv:0902.1625

Date: Tue, 10 Feb 2009 10:44:17 GMT (2600kb)

Title: Superfluid to Mott-insulator transition in an anizotropic

two--dimensional optical lattice

Authors: T. P. Polak, T. K. Kopec

Categories: cond-mat.other

Comments: 8 pages, 3 figures

Journal-ref: Ann. Phys. (Berlin) 17 No. 12, p. 947-954 (2008)

DOI: 10.1002/andp.200810328

\\

We study the superfluid to Mott-insulator transition of bosons in an optical

anizotropic lattice by employing the Bose-Hubbard model living on a

two-dimensional lattice with anizotropy parameter $\kappa$. The compressible

superfluid state and incompressible Mott-insulator (MI) lobes are efficiently

described analytically, using the quantum U(1) rotor approach. The ground state

phase diagram showing the evolution of the MI lobes is quantified for arbitrary

values of $\kappa$, corresponding to various kind of lattices: from square,

through rectangular to almost one-dimensional.

\\ ( http://arxiv.org/abs/0902.1625 , 2600kb)

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arXiv:0902.1670

Date: Tue, 10 Feb 2009 15:10:47 GMT (78kb)

Title: Kosterlitz-Thouless Phase Transition and Ground State Fidelity: a Novel

Perspective from Matrix Product States

Authors: Hong-Lei Wang, Jian-Hui Zhao, Bo Li, Huan-Qiang Zhou

Categories: cond-mat.stat-mech cond-mat.str-el

Comments: 4+pages, 2 figures, 1 table

\\

The Kosterlitz-Thouless transition is studied from the representation of the

systems's ground state wave functions in terms of Matrix Product States for a

quantum system on an infinite-size lattice in one spatial dimension. It is

found that, in the critical regime for a one-dimensional quantum lattice system

with continuous symmetry, the newly-developed infinite Matrix Product State

algorithm automatically leads to infinite degenerate ground states, due to the

finiteness of the truncation dimension. This results in \textit{pseudo}

continuous symmetry spontaneous breakdown, which allows to introduce a

pseudo-order parameter that must be scaled down to zero, in order to be

consistent with the Mermin-Wegner theorem. We also show that the ground state

fidelity per lattice site exhibits a \textit{catastrophe point}, thus resolving

a controversy regarding whether or not the ground state fidelity is able to

detect the Kosterlitz-Thouless transition.

\\ ( http://arxiv.org/abs/0902.1670 , 78kb)

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arXiv:0902.1727

Date: Tue, 10 Feb 2009 19:21:26 GMT (784kb)

Title: Molecular states near a collision threshold

Authors: Paul S. Julienne

Categories: physics.atom-ph

Comments: To appear as a chapter in a book on cold molecules, edited by R.

Krems et al

\\

This chapter summarizes the properties of near-threshold molecular states

that can be formed from ultracold atoms. The properties of the states for a

single potential are characterized for different partial waves using the

concepts of quantum defect theory for a van der Waals potential. Examples are

given for various isotopes of the Yb_2 molecule. Magnetically tunable Feshbach

resonances or photoassociation resonances are characterized by the multichannel

version of the theory. Examples of the latter are given for the KRb molecule.

\\ ( http://arxiv.org/abs/0902.1727 , 784kb)

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arXiv:0902.1793

Date: Wed, 11 Feb 2009 01:51:25 GMT (829kb)

Title: Atomic entanglement generation and detection via degenerate

four-wave-mixing of a Bose-Einstein condensate in an optical lattice

Authors: Andrew J. Ferris, Murray K. Olsen, and Matthew J. Davis

Categories: cond-mat.other

Comments: 11 pages, 6 figures

\\

The unequivocal detection of entanglement between two distinct matter-wave

pulses is a significant challenge that has yet to be experimentally

demonstrated. We describe a realistic scheme to generate and detect continuous

variable entanglement between two atomic matter-wave pulses produced via

degenerate four-wave-mixing from an initially trapped Bose-Einstein condensate

loaded into a one-dimensional optical lattice. We perform a comprehensive

numerical investigation for fixed condensate parameters to determine the

maximum violation of separability and Einstein-Podolsky-Rosen inequalities for

field quadrature entanglement, and describe and simulate an experimental scheme

for measuring the necessary quadratures.

\\ ( http://arxiv.org/abs/0902.1793 , 829kb)

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arXiv:0902.1993

Date: Thu, 12 Feb 2009 19:17:44 GMT (45kb)

Title: Magnetic phases and transitions of the two-species Bose-Hubbard model

Authors: Stephen Powell

Categories: cond-mat.stat-mech cond-mat.supr-con

Comments: 9 pages, 4 figures

\\

A model of two-species bosons moving on the sites of a lattice is studied at

nonzero temperature, focusing on magnetic order and superfluid-insulator

transitions. Firstly, Landau theory is used to find the general structure of

the phase diagram, and in particular to demonstrate the presence of first-order

transitions and hysteresis in the vicinity of a multicritical point. Secondly,

an explicit thermodynamic phase diagram is calculated using an approach based

on a field-theoretical description of the Bose-Hubbard model, which

incorporates the crucial effects of particle-number fluctuations. The maximum

transition temperature to a magnetically ordered Mott insulator is found to be

limited by the presence of the superfluid phase.

\\ ( http://arxiv.org/abs/0902.1993 , 45kb)

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arXiv:0902.2028

Date: Thu, 12 Feb 2009 03:38:27 GMT (85kb)

Title: Yang-Yang thermodynamics of Bose-Fermi Mixture

Authors: Xiangguo Yin, Shu Chen, and Yunbo Zhang

Categories: cond-mat.str-el cond-mat.other

Comments: 4 figures

\\

We investigate theoretically the behavior of one-dimensional interacting

Bose-Fermi mixture with equal masses and equal repulsive interactions between

atoms at finite temperature in the scheme of thermodynamic Bethe Ansatz.

Combining the Yang-Yang thermodynamic formalism with local density

approximation in a harmonic trap, we calculate the density distribution of

bosons and fermions numerically by treating the radially and axially excited

states in different ways. Our result from exactly solvable solutions may be

used as the signature of 1D interacting Bose-Fermi mixture for experimental

data fitting where mean-field theoretical approaches fail.

\\ ( http://arxiv.org/abs/0902.2028 , 85kb)

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arXiv:0902.2151

Date: Thu, 12 Feb 2009 16:22:35 GMT (431kb)

Title: Controlling a magnetic Feshbach resonance with laser light

Authors: D.M. Bauer, M. Lettner, C. Vo, G. Rempe, S. D\"urr

Categories: cond-mat.other

\\

The capability to tune the strength of the elastic interparticle interaction

is crucial for many experiments with ultracold gases. Magnetic Feshbach

resonances are a tool widely used for this purpose, but future experiments

would benefit from additional flexibility such as spatial modulation of the

interaction strength on short length scales. Optical Feshbach resonances offer

this possibility in principle, but suffer from fast particle loss due to

light-induced inelastic collisions. Here we show that light near-resonant with

a molecular bound-to-bound transition can be used to shift the magnetic field

at which a magnetic Feshbach resonance occurs. This makes it possible to tune

the interaction strength with laser light and at the same time induce

considerably less loss than an optical Feshbach resonance would do.

\\ ( http://arxiv.org/abs/0902.2151 , 431kb)

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arXiv:0902.2171

Date: Thu, 12 Feb 2009 17:07:34 GMT (899kb)

Title: Experimental demonstration of painting arbitrary and dynamic potentials

for Bose-Einstein condensates

Authors: K. Henderson, C. Ryu, C. MacCormick and M. G. Boshier

Categories: cond-mat.other

Report-no: LA-UR-08-06615

\\

There is a pressing need for robust and straightforward methods to create

potentials for trapping Bose-Einstein condensates which are simultaneously

dynamic, fully arbitrary, and sufficiently stable to not heat the ultracold

gas. We show here how to accomplish these goals, using a rapidly-moving laser

beam that "paints" a time-averaged optical dipole potential in which we create

BECs in a variety of geometries, including toroids, ring lattices, and square

lattices. Matter wave interference patterns confirm that the trapped gas is a

condensate. As a simple illustration of dynamics, we show that the technique

can transform a toroidal condensate into a ring lattice and back into a toroid.

The technique is general and should work with any sufficiently polarizable

low-energy particles.

\\ ( http://arxiv.org/abs/0902.2171 , 899kb)

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arXiv:0902.2178

Date: Thu, 12 Feb 2009 17:50:17 GMT (23kb)

Title: Static and Dynamic properties of a Fermi-gas of cooled atoms near a wide

Feshbach resonance

Authors: Deqiang Sun, Ar. Abanov, V. L. Pokrovsky

Categories: cond-mat.other

Comments: 10 pages, no figures

\\

We introduce the Global Spin Model to study the static and dynamic properties

of the ultracold fermionic gas near the broad Feshbach resonance. We show that

the problem of molecular production, in a single-mode approximation, is reduced

to the linear Landau-Zener problem for operators. The strong interaction leads

to significant renormalization of the gap between adiabatic levels. In contrast

to static problem the close vicinity of exact resonance does not play

substantial role. Two main physical results of our theory is the high

sensitivity of molecular production to the initial value of magnetic field and

generation of a large BCS condensate distributed over a broad range of momenta

in a wide range of parameters. We calculate the amplitude of the condensate as

function of the initial detuning and the rate of the magnetic field sweep.

\\ ( http://arxiv.org/abs/0902.2178 , 23kb)

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arXiv:0902.2058

Date: Thu, 12 Feb 2009 12:53:27 GMT (415kb)

Title: Direct observation of vacuum fluctuations in a spinor Bose-Einstein

condensate

Authors: Carsten Klempt, Oliver Topic, Gebremedhn Gebreyesus, Manuel Scherer,

Thorsten Henninger, Philipp Hyllus, Wolfgang Ertmer, Luis Santos, and Jan

Arlt

Categories: quant-ph

Comments: 5 pages, 4 figures

\\

The nature of the vacuum state and its fluctuations constitutes one of the

most fascinating aspects of modern physics. Despite their non-intuitive

character, vacuum fluctuations play an important role for our understanding of

nature. Specifically, the parametric amplification of such fluctuations is

crucial for phenomena ranging from optical parametric down-conversion to

stimulated positronium annihilation, and boson creation in Universe inflation.

Spinor Bose-Einstein condensates, consisting of atoms with non-zero total spin,

provide an optimal system for the investigation of the vacuum state, since

vacuum fluctuations can dominate classical fluctuations in the spin dynamics of

these magnetic superfluids. Here we explore the amplification of vacuum

fluctuations in gaseous spinor condensates in an unstable spin configuration.

We observe strong instability resonances in the spinor condensate, induced by

the confinement of the atomic ensemble. Our work shows that it is crucial for

the understanding of spinor dynamics to consider this confinement, which has

previously been neglected in homogeneous approximations. On these resonances we

conclusively demonstrate that the system can act as a parametric amplifier for

vacuum fluctuations, providing a new microscope to investigate the vacuum state

and a promising method for entanglement and squeezing production in matter

waves.

\\ ( http://arxiv.org/abs/0902.2058 , 415kb)

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arXiv:0902.2096

Date: Thu, 12 Feb 2009 12:19:29 GMT (346kb)

Title: Detection and engineering of spatial mode entanglement with ultra-cold

bosons

Authors: J. Goold, Libby Heaney, Th. Busch, V. Vedral

Categories: quant-ph

Comments: 5 pages, 3 figures

\\

We outline an interferometric scheme for the detection of bi-mode and

multi-mode spatial entanglement of finite-temperature,interacting Bose gases of

fixed particle number. Whether entanglement is present in the gas depends on

the existence of the single-particle reduced density matrix between different

regions of space. We apply the scheme to the problem of a harmonically trapped

boson pair and show that while entanglement is rapidly decreasing with

temperature, a significant amount remains for all interaction strengths at zero

temperature.Thus, by tuning the interaction parameter, the distribution of

entanglement between many spatial modes can be modified.

\\ ( http://arxiv.org/abs/0902.2096 , 346kb)

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The replacements:

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arXiv:0807.3894

replaced with revised version Fri, 6 Feb 2009 10:30:38 GMT (474kb)

Title: Nearest-Neighbor Detection of Atoms in a 1D Optical Lattice by

Fluorescence Imaging

Authors: M. Karski, L. F\"orster, J. M. Choi, W. Alt, A. Widera, D. Meschede

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

Comments: 4 pages, 4 figures

Journal-ref: Phys. Rev. Lett. 102, 053001 (2009)

DOI: 10.1103/PhysRevLett.102.053001

\\ ( http://arxiv.org/abs/0807.3894 , 474kb)

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arXiv:0806.1688

replaced with revised version Mon, 9 Feb 2009 04:06:52 GMT (131kb)

Title: Anyons from fermions with conventional two-body interactions

Authors: Yue Yu, Yi Li

Categories: cond-mat.other cond-mat.str-el

Comments: 10 pages,3 figures, the contents of mapping to honeycomb lattice are

removed and will be published separately

\\ ( http://arxiv.org/abs/0806.1688 , 131kb)

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arXiv:0806.3806

replaced with revised version Mon, 9 Feb 2009 04:27:30 GMT (658kb)

Title: Chaotic shock waves of a Bose-Einstein condensate

Authors: Wenhua Hai, Qianquan Zhu, Shiguang Rong

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

Comments: 5 pages, 1 figures

Journal-ref: PHYSICAL REVIEW A 79, 023603 (2009)

\\ ( http://arxiv.org/abs/0806.3806 , 658kb)

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arXiv:0807.3067

replaced with revised version Mon, 9 Feb 2009 19:46:56 GMT (170kb)

Title: Spin Field Effect Transistors with Ultracold Atoms

Authors: J. Y. Vaishnav, Julius Ruseckas, Charles W. Clark, Gediminas

Juzeliunas

Categories: cond-mat.mes-hall cond-mat.other physics.atom-ph quant-ph

Journal-ref: Phys. Rev. Lett. 101, 265302 (2008)

DOI: 10.1103/PhysRevLett.101.265302

\\ ( http://arxiv.org/abs/0807.3067 , 170kb)

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arXiv:0808.2350

replaced with revised version Mon, 9 Feb 2009 16:10:59 GMT (107kb)

Title: Dynamically Generated Double Occupancy as a Probe of Cold Atom Systems

Authors: S.D. Huber, A. R\"uegg

Categories: cond-mat.other cond-mat.str-el

Comments: 5 pages, 3 figures

Journal-ref: Phys. Rev. Lett. 102, 065301 (2009)

DOI: 10.1103/PhysRevLett.102.065301

\\ ( http://arxiv.org/abs/0808.2350 , 107kb)

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arXiv:0811.1065

replaced with revised version Mon, 9 Feb 2009 15:01:49 GMT (170kb)

Title: Ground-state properties of interacting two-component Bose gases in a

hard-wall trap

Authors: Yajiang Hao, Yunbo Zhang, Xi-Wen Guan, Shu Chen

Categories: cond-mat.str-el cond-mat.stat-mech

Comments: 9 pages, 8 figures, PRA in press

\\ ( http://arxiv.org/abs/0811.1065 , 170kb)

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arXiv:0901.3555

replaced with revised version Sat, 7 Feb 2009 03:48:47 GMT (672kb)

Title: Density-Wave and Antiferromagnetic States of Fermionic Atoms in Optical

Lattices

Authors: Takuji Higashiyama, Kensuke Inaba, Sei-ichiro Suga

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

Comments: 7 pages, 7 figures

Journal-ref: Phys. Rev. A 79, 023607 (2009)

DOI: 10.1103/PhysRevA.79.023607

\\ ( http://arxiv.org/abs/0901.3555 , 672kb)

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arXiv:0901.4103

replaced with revised version Mon, 9 Feb 2009 20:17:11 GMT (1559kb)

Title: Exotic phases and quantum phase transitions: model systems and

experiments

Authors: Subir Sachdev

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

Comments: 28 pages, 12 figures; Rapporteur talk at the 24th Solvay Conference

on Physics, "Quantum Theory of Condensed Matter", Brussels, Oct 2008; (v2+v3)

added refs and clarifications

\\ ( http://arxiv.org/abs/0901.4103 , 1559kb)

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arXiv:0901.4437

replaced with revised version Mon, 9 Feb 2009 08:31:29 GMT (149kb)

Title: Momentum distribution of a freely expanding Lieb-Liniger gas

Authors: D. Juki\'c, B. Klajn, and H. Buljan

Categories: cond-mat.other

Comments: small changes; references corrected

\\ ( http://arxiv.org/abs/0901.4437 , 149kb)

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arXiv:0806.3780

replaced with revised version Tue, 10 Feb 2009 14:50:13 GMT (170kb)

Title: Cold Fermionic Atoms in Two-Dimensional Traps -- Pairing versus Hund's

Rule

Authors: M. Rontani, J. R. Armstrong, Y. Yu, S. {\AA}berg, S. M. Reimann

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

Comments: RevTeX 4.0, 4 pages, 5 colour postscript figures

Journal-ref: Physical Review Letters 102, 060401 (2009)

DOI: 10.1103/PhysRevLett.102.060401

\\ ( http://arxiv.org/abs/0806.3780 , 170kb)

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arXiv:0808.1293

replaced with revised version Mon, 9 Feb 2009 22:11:44 GMT (52kb)

Title: Topological Entropy of Quantum Hall States in Rotating Bose Gases

Authors: Alexis G. Morris, David L. Feder

Categories: cond-mat.mes-hall

Comments: 4 pages, 4 figures

Journal-ref: Phys. Rev. A 79, 013619 (2009)

DOI: 10.1103/PhysRevA.79.013619

\\ ( http://arxiv.org/abs/0808.1293 , 52kb)

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arXiv:0809.3696

replaced with revised version Wed, 11 Feb 2009 15:17:10 GMT (61kb)

Title: Lieb-Liniger model of a dissipation-induced Tonks-Girardeau gas

Authors: S. D\"urr, J. J. Garcia-Ripoll, N. Syassen, D. M. Bauer, M. Lettner,

J. I. Cirac, G. Rempe

Categories: cond-mat.other

Journal-ref: Phys. Rev. A 79, 023614 (2009)

DOI: 10.1103/PhysRevA.79.023614

\\ ( http://arxiv.org/abs/0809.3696 , 61kb)

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arXiv:0810.1321

replaced with revised version Tue, 10 Feb 2009 21:16:40 GMT (562kb)

Title: Induced p-wave superfluidity in two dimensions: Brane world in cold

atoms and nonrelativistic defect CFTs

Authors: Yusuke Nishida

Categories: cond-mat.other hep-th nucl-th

Comments: 22 pages, 10 figures; version to appear in Ann. Phys

Report-no: INT-PUB 08-46, MIT-CTP 3984

\\ ( http://arxiv.org/abs/0810.1321 , 562kb)

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arXiv:0808.2900

replaced with revised version Thu, 12 Feb 2009 14:03:00 GMT (833kb,D)

Title: Unconventional pairing in excitonic condensates under spin-orbit

coupling

Authors: M. Ali Can and T. Hakio\u{g}lu

Categories: cond-mat.str-el

Comments: 4 pages, 4 figures, 1 table

\\ ( http://arxiv.org/abs/0808.2900 , 833kb)

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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 Tue May 19 2009 - 08:39:36 EST

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