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

Date: Wed, 11 Jun 2008 10:57:04 +1000

Date: Wed, 11 Jun 2008 10:57:04 +1000

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

Dear all,

This week there were 25 new preprints and 15 replacements this week:

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arXiv:0805.2512

Date: Fri, 16 May 2008 12:28:20 GMT (73kb)

Title: Interface Tension of Bose-Einstein Condensates

Authors: Bert Van Schaeybroeck

Categories: cond-mat.stat-mech

Comments: 10 pages, 4 figures

\\

Motivated by recent observations of phase-segregated binary Bose-Einstein

condensates, we propose a method to calculate the excess energy due to the

interface tension of a trapped configuration. By this method one should be able

to numerically reproduce the experimental data by means of a simple

Thomas-Fermi approximation, combined with interface excess terms and the

Laplace equation. Using the Gross-Pitaevskii theory, we find expressions for

the interface excesses which are accurate in a very broad range of the

interspecies and intraspecies interaction parameters. We also present

finite-temperature corrections to the interface tension which, aside from the

regime of weak segregation, turn out to be small.

\\ ( http://arxiv.org/abs/0805.2512 , 73kb)

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arXiv:0805.2571

Date: Fri, 16 May 2008 18:05:30 GMT (740kb)

Title: Superfluid Bose gas in two dimensions

Authors: S. Floerchinger and C. Wetterich

Categories: cond-mat.supr-con

Comments: 10 pages, 12 figures

\\

We investigate Bose-Einstein condensation for ultracold bosonic atoms in

two-dimensional systems. The functional renormalization group for the average

action allows us to follow the effective interactions from molecular scales

(microphysics) to the characteristic extension of the probe $l$ (macrophysics).

In two dimensions the scale dependence of the dimensionless interaction

strength $\lambda$ is logarithmic. Furthermore, for large $l$ the frequency

dependence of the inverse propagator becomes quadratic. We find an upper bound

for $\lambda$, and for large $\lambda$ substantial deviations from the

Bogoliubov results for the condensate depletion, the dispersion relation and

the sound velocity. The melting of the condensate above the critical

temperature $T_c$ is associated to a phase transition of the

Kosterlitz-Thouless type. The critical temperature in units of the density,

$T_c/n$, vanishes for $l\to\infty$ logarithmically.

\\ ( http://arxiv.org/abs/0805.2571 , 740kb)

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arXiv:0805.2539

Date: Fri, 16 May 2008 14:00:33 GMT (647kb)

Title: A method for the quantitative study of atomic transitions in a magnetic

field based on an atomic vapor cell with L=lambda

Authors: Armen Sargsyan, Grant Hakhumyan, Aram Papoyan, David Sarkisyan, Aigars

Atvars, and Marcis Auzinsh

Categories: physics.atom-ph

\\

We describe the so-called "Lambda-Zeeman method" to investigate individual

hyperfine transitions between Zeeman sublevels of atoms in an external magnetic

field of 0.1 mT - 0.25 T. Atoms are confined in a nanocell with thickness L =

Lambda, where Lambda is the resonant wavelength (794 nm or 780 nm for D1 or D2

line of Rb). Narrow resonances in the transmission spectrum of the nanocell are

split into several components in a magnetic field; their frequency positions

and probabilities depend on the B-field. Possible applications are described,

such as magnetometers with nanometric spatial resolution and tunable atomic

frequency references.

\\ ( http://arxiv.org/abs/0805.2539 , 647kb)

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arXiv:0805.2719

Date: Mon, 19 May 2008 15:43:21 GMT (126kb)

Title: Magnetism of Cold Fermionic Atoms on p-Band of an Optical Lattice

Authors: Lei Wang, Xi Dai, Shu Chen, and X. C. Xie

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

Comments: 5 pages, 4 figures

\\

We carry out \textit{ab initio} study of ground state phase diagram of

spin-1/2 cold fermionic atoms within two-fold degenerate $p$-band of an

anisotropic optical lattice. Using the Gutzwiller variational approach, we show

that a robust ferromagnetic phase exists for a vast range of band fillings and

interacting strengths. The ground state crosses over from spin density wave

state to spin-1 Neel state at half filling. Additional harmonic trap will

induce spatial separation of varies phases. We also discuss several relevant

observable consequences and detection methods. Experimental test of the results

reported here may shed some light on the long-standing issue of itinerant

ferromagnetism.

\\ ( http://arxiv.org/abs/0805.2719 , 126kb)

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arXiv:0805.2726

Date: Sun, 18 May 2008 13:05:17 GMT (372kb)

Title: Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases

with population and mass imbalance

Authors: G. J. Conduit, P. H. Conlon, B. D. Simons

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

Comments: 11 pages, 6 figures. Accepted by Phys. Rev. A

\\

We explore the zero temperature phase behavior of a two-dimensional

two-component atomic Fermi gas with population and mass imbalance in the regime

of the BEC-BCS crossover. Working in the mean-field approximation, we show that

the normal and homogeneous balanced superfluid phases are separated by an

inhomogeneous superfluid phase of Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) type.

We obtain an analytical expression for the line of continuous transitions

separating the normal and inhomogeneous FFLO phases. We further show that the

transition from the FFLO phase to the homogeneous balanced superfluid is

discontinuous leading to phase separation. If the species have different

masses, the superfluid phase is favored when the lighter species is in excess.

We explore the implications of these findings for the properties of the

two-component Fermi gas in the atomic trap geometry. Finally, we compare and

contrast our findings with the predicted phase behavior of the electron-hole

bilayer system.

\\ ( http://arxiv.org/abs/0805.2726 , 372kb)

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arXiv:0805.2748

Date: Sun, 18 May 2008 19:17:42 GMT (384kb)

Title: Instability of condensation in the zero-range process with random

interaction

Authors: Stefan Grosskinsky, Paul Chleboun and Gunter M. Sch\"utz

Categories: cond-mat.stat-mech

Comments: 4 pages, 4 figures

\\

The zero-range process is a stochastic interacting particle system that is

known to exhibit a condensation transition analogous to Bose-Einstein

condensation. We present a detailed analysis of the condensation transition in

the presence of quenched disorder in the particle interactions. Using rigorous

probabilistic arguments we show that disorder changes the critical exponent in

the interaction strength below which a condensation transition may occur in a

finite system. Moreover, for some natural assumptions on the disorder

distribution the critical density is shown to diverge with system size. In the

thermodynamic limit the condensation transition is then unstable with respect

to interaction disorder.

\\ ( http://arxiv.org/abs/0805.2748 , 384kb)

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arXiv:0805.2798

Date: Mon, 19 May 2008 19:07:09 GMT (233kb)

Title: Cooper pair turbulence in atomic Fermi gases

Authors: M. Dzero, E. A. Yuzbashyan, B. L. Altshuler

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

Comments: 4 pages, 2 figures

\\

We investigate the stability of spatially uniform solutions for the

collisionless dynamics of a fermionic superfluid. We demonstrate that, if the

system size is larger than the superfluid coherence length, the solution

characterized by a periodic in time order parameter is unstable with respect to

spatial fluctuations. The instability is due to the parametric excitations of

pairing modes with opposite momenta. The growth of spatial modulations is

suppressed by nonlinear effects resulting in a state characterized by a random

superposition of wave packets of the superfluid order parameter. We suggest

that this state can be probed by spectroscopic noise measurements.

\\ ( http://arxiv.org/abs/0805.2798 , 233kb)

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arXiv:0805.2613

Date: Fri, 16 May 2008 20:07:26 GMT (7678kb)

Title: Microscopic atom optics: from wires to an atom chip

Authors: R. Folman, P. Kruger, J. Schmiedmayer, J. Denschlag, C. Henkel

Categories: quant-ph

Comments: published version can be downloaded at: http://www.atomchip.org ->

Review Articles

Journal-ref: Adv. in At. Mol. and Opt. Physics 48, 263-356 (2002)

\\

We give a comprehensive overview of the development of micro traps, from the

first experiments on guiding atoms using current carrying wires in the early

1990's to the creation of a BEC on an atom chip.

\\ ( http://arxiv.org/abs/0805.2613 , 7678kb)

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arXiv:0805.2708

Date: Mon, 19 May 2008 11:39:19 GMT (368kb,D)

Title: Modulation transfer spectroscopy in atomic rubidium

Authors: D. J. McCarron, S. A. King and S. L. Cornish

Categories: physics.atom-ph

Comments: 13 pages, 7 figures

\\

We report modulation transfer spectroscopy on the D2 transitions in 85Rb and

87Rb using a simple home-built electro-optic modulator (EOM). We show that both

the gradient and amplitude of modulation transfer spectroscopy signals, for the

87Rb F=2 to F'=3 and the 85Rb F=3 to F'=4 transitions, can be significantly

enhanced by expanding the beams, improving the signals for laser frequency

stabilization. The signal gradient for these transitions is increased by a

factor of 3 and the peak to peak amplitude was increased by a factor of 2. The

modulation transfer signal for the 85Rb F=2 to F' transitions is also presented

to highlight how this technique can generate a single, clear line for laser

frequency stabilization even in cases where there are a number of closely

spaced hyperfine transitions.

\\ ( http://arxiv.org/abs/0805.2708 , 368kb)

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arXiv:0805.3031

Date: Tue, 20 May 2008 19:02:34 GMT (88kb)

Title: Proposed realization of itinerant ferromagnetism in optical lattices

Authors: Shizhong Zhang and Congjun Wu

Categories: cond-mat.str-el cond-mat.mtrl-sci

\\

We propose to realize the itinerant ferromagnetism of two-component cold

fermionic atoms in the $p$-orbital bands in optical lattices. The band flatness

in the two-dimensional honeycomb lattice dramatically amplifies the interaction

effect driving the ferromagnetic transitions even with a weak repulsive

interaction. This has the advantage to maintain the system stability without

decaying to the dimer-molecule state which occurs as approaching the Feshbach

resonance from the side with the positive scattering length. Experimental

signatures and detections are also discussed.

\\ ( http://arxiv.org/abs/0805.3031 , 88kb)

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arXiv:0805.3047

Date: Tue, 20 May 2008 10:54:25 GMT (177kb)

Title: Critical Temperature Curve in the BEC-BCS Crossover

Authors: Evgeni Burovski, Evgeny Kozik, Nikolay Prokof'ev, Boris Svistunov,

Matthias Troyer

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

Comments: revtex, 4 pages, 3 figures

\\

The strongly-correlated regime of the BCS-BEC crossover can be realized by

diluting a system of two-component fermions with a short-range attractive

interaction. We investigate this system via a novel continuous-space-time

diagrammatic determinant Monte Carlo method and determine the universal curve

$T_c/\epsilon_F$ for the transition temperature between the normal and the

superfluid states as a function of the scattering length with the maximum on

the BEC side. At unitarity, we confirm that $T_c/\epsilon_F = 0.152(7)$.

\\ ( http://arxiv.org/abs/0805.3047 , 177kb)

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arXiv:0805.2990

Date: Tue, 20 May 2008 01:56:48 GMT (39kb,D)

Title: Motion of quantum particle in delute Bose-Einstein condensate at zero

temperature

Authors: Alexey Novikov and Mikhail Ovchinnikov

Categories: quant-ph

\\

The motion of single quantum particle through Bose-Einstein condensate (BEC)

is considered within perturbation theory with respect to the particle-BEC

interaction. The Hamiltonian of BEC is diagonalized by means of Bogoliubov's

method. The process of dissipation due to the creation of excitation in BEC is

analyzed and the dissipation rate is calculated in the lowest order of

perturbation theory. The Landau's criterion for energy dissipation in BEC is

then recovered. The energy spectrum of the impurity particle due to the

interaction with BEC and its effective mass are evaluated.

\\ ( http://arxiv.org/abs/0805.2990 , 39kb)

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arXiv:0805.3060

Date: Tue, 20 May 2008 19:57:29 GMT (76kb)

Title: On the problem of detection of genuine multipartite correlations

Authors: Andrzej Grudka, Michal Horodecki, Pawel Horodecki, Ryszard Horodecki

Categories: quant-ph

Comments: Comments welcome

\\

We propose two postulates which each measure or indicator of genuine

multipartite correlations should satisfy. We show that covariance does not

satisfy any of these postulates. Hence it cannot be used as an indicator of

genuine multipartite classical correlations. We also propose possible

definition of genuine multipartite classical correlations.

\\ ( http://arxiv.org/abs/0805.3060 , 76kb)

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arXiv:0805.3069

Date: Tue, 20 May 2008 12:47:34 GMT (17kb)

Title: Mott Plateau in Trapped Bose-Fermi Mixture

Authors: Akiko Masaki, Sota Tsukada, and Hiroyuki Mori

Categories: quant-ph

Comments: 8 pages, 2 figures

Journal-ref: Journal of the Physical Society of Japan, vol 77, No.5, May, 2008,

054301

DOI: 10.1143/JPSJ.77.054301

\\

Boson-Fermion mixture confined on an optical lattice is numerically studied.

Mott-plateau like behavior is observed under certain conditions in the density

profile of the bosons and fermions as one sees in bosonic atoms in a trap

potential. In the Mott plateau area, the total number of the bosons and

fermions at each site is kept to an integer value but both local density of the

bosons and that of the fermions take some intermediate values. Unlike bosonic

or fermionic Mott insulators, the bosons and fermions can move even in the Mott

plateau area by exchanging their positions. With Monte Carlo simulations we

demonstrate the formation of the Mott plateau, examine the property of the

bosons and fermions by measuring the densities and local density fluctuations,

and give discussion on this rather new state.

\\ ( http://arxiv.org/abs/0805.3069 , 17kb)

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arXiv:0805.3083

Date: Tue, 20 May 2008 14:00:29 GMT (83kb)

Title: Generation of nonground-state Bose-Einstein condensates by modulating

atomic interactions

Authors: E. R. F. Ramos, E. A. L. Henn, J. A. Seman, M. A. Caracanhas, K. M. F.

Magalh\~aes, V. I. Yukalov, V. S. Bagnato

Categories: quant-ph

Comments: 4 pages, 3 figures, 1 table, submitted to PRL

\\

A new technique is proposed for creating nonground-state Bose-Einstein

condensates in a trapping potential by means of the temporal modulation of

atomic interactions. Applying a time-dependent spatially homogeneous magnetic

field modifies the atomic scattering length. An alternating modulation of the

scattering length excites the condensate, which, under special conditions, can

be transferred to an excited nonlinear coherent mode. It is shown that there

occurs a phase-transition-like behavior in the time-averaged population

imbalance between the ground and excited states. The application of the

suggested technique to realistic experimental conditions is analyzed and it is

shown that the considered effect can be realized for experimentally available

condensates.

\\ ( http://arxiv.org/abs/0805.3083 , 83kb)

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arXiv:0805.2937

Date: Mon, 19 May 2008 20:45:31 GMT (196kb)

Title: Achieving very long lifetimes in optical lattices with pulsed cooling

Authors: Michael J. Gibbons, Soo Y. Kim, Kevin M. Fortier, Peyman Ahmadi, and

Michael S. Chapman

Categories: physics.atom-ph

Comments: 4 pages, 5 figures

\\

We have realized a one dimensional optical lattice for individual atoms with

a lifetime >300 s, which is 5 times longer than previously reported. In order

to achieve this long lifetime, it is necessary to laser cool the at-oms briefly

every 20 s to overcome heating due to technical fluctuations in the trapping

potential. Without cooling, we observe negligible atom loss within the first 20

s followed by an exponential decay with a 62 s time constant. We obtain

quantitative agreement with the measured fluctuations of the trapping potential

and the corresponding theoretical heating rates.

\\ ( http://arxiv.org/abs/0805.2937 , 196kb)

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arXiv:0805.2993

Date: Tue, 20 May 2008 02:13:30 GMT (363kb)

Title: Anomalous dispersion and negative group velocity in a coherence-free

cold atomic medium

Authors: William G.A. Brown, Russell McLean, Andrei Sidorov, Peter Hannaford

and Alexander Akulshin

Categories: physics.optics physics.atom-ph

Comments: 15 pages, 5 figures

\\

We have observed the propagation of an approximately 35 ns long light pulse

with a negative group velocity through a laser-cooled 85Rb atomic medium. The

anomalous dispersion results from linear atom-light interaction, and is

unrelated to long-lived ground state coherences often associated with fast

light in atomic media. The observed negative group velocity (-c/360) in the Rb

magneto-optical trap for a pulse attenuated by less than 50% is in good

agreement with the value of dispersion measured independently by an RF

heterodyne method. The spectral region of anomalous dispersion is between 15

and 40 MHz, which is an order of magnitude wider than that typically associated

with ground-state coherences.

\\ ( http://arxiv.org/abs/0805.2993 , 363kb)

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arXiv:0805.3226

Date: Wed, 21 May 2008 08:36:59 GMT (461kb)

Title: Thermodynamics of a trapped unitary Fermi gas

Authors: R. Haussmann and W. Zwerger

Categories: cond-mat.stat-mech

Comments: 9 pages, 5 figures

Report-no: KN-08-05

\\

Thermodynamic properties of an ultracold Fermi gas in a harmonic trap are

calculated within a local density approximation, using a conserving many-body

formalism for the BCS to BEC crossover problem, which has been developed by

Haussmann et al. [Phys. Rev. A 75, 023610 (2007)]. We focus on the unitary

regime near a Feshbach resonance and determine the local density and entropy

profiles and the global entropy S(E) as a function of the total energy E. Our

results are in good agreement with both experimental data and previous

analytical and numerical results for the thermodynamics of the unitary Fermi

gas. The value of the Bertsch parameter at T=0 and the superfluid transition

temperature, however, differ appreciably. We show that, well in the superfluid

regime, removal of atoms near the cloud edge enables cooling far below

temperatures that have been reached so far.

\\ ( http://arxiv.org/abs/0805.3226 , 461kb)

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arXiv:0805.3263

Date: Wed, 21 May 2008 12:04:46 GMT (481kb)

Title: Density engineering of an oscillating soliton/vortex ring in a

Bose-Einstein condensate

Authors: Itay Shomroni, Elias Lahoud, Shahar Levy, and Jeff Steinhauer

Categories: cond-mat.other

\\

When two Bose-Einstein condensates (BEC's) collide with high collisional

energy, the celebrated matter wave interference pattern results. For lower

collisional energies the repulsive interaction energy becomes significant, and

the interference pattern evolves into an array of grey solitons. The lowest

collisional energy, producing a single pair of solitons, has not been probed.

We use density engineering on the healing length scale to produce such a pair

of solitons. These solitons then evolve periodically between vortex rings and

solitons, which we image in-situ on the healing length scale. The stable,

periodic evolution is in sharp contrast to the behavior of previous

experiments, in which the solitons decay irreversibly into vortex rings via the

snake instability. The evolution can be understood in terms of conservation of

mass and energy in a narrow condensate. The periodic oscillation between two

qualitatively different forms seems to be a rare phenomenon in nature.

\\ ( http://arxiv.org/abs/0805.3263 , 481kb)

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arXiv:0805.3315

Date: Wed, 21 May 2008 17:18:38 GMT (120kb)

Title: Exploring the order parameter symmetry of p-wave Fermi condensates

Authors: Wei Zhang and C.A.R. Sa de Melo

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

Comments: 4+pages, 2 figures

\\

We discuss the time-of-flight expansion of dilute p-wave Fermi condensates on

the BEC side of Feshbach resonances, as a way to extract information about the

order parameter symmetry for superfluidity. We show that the cloud profile is

in general sensitive to the interaction strength between fermions, the

magnitude and direction of external magnetic fields, and to the angular

momentum projection of the order parameter. In particular, due to the

anisotropic nature of p-wave interactions we show that the time-of-flight

expansion of a p-wave superfluid is anisotropic even if the superfluid is

confined to a completely isotropic trap, unlike the case of Bose or s-wave

Fermi condensates, which under the same circumstances expand isotropically.

Furthermore, we demonstrate that expanding p-wave superfluids released from

axially symmetric traps experience anisotropy inversions, where the aspect

ratio between the axial and radial directions change during expansion, while

the axial symmetry can also be lost reflecting the spatial anisotropy of the

underlying interaction.

\\ ( http://arxiv.org/abs/0805.3315 , 120kb)

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arXiv:0805.3180

Date: Wed, 21 May 2008 07:10:17 GMT (36kb)

Title: GHZ Entanglement Witnesses for Non-interacting Fermi Systems

Authors: H. Habibian, J. W. Clark, K. Hingerl, N. Behbood

Categories: quant-ph

Comments: 11 pages, 1 figure

\\

In this paper we investigate GHZ\W entanglement for indistinguishable

systems. For this, we introduce new classes of parameterized GHZ entanglement

witnesses to identify two different classes of genuine entangled states for

tripartite non-interacting Fermionic systems which lead to two different

boundary conditions. Contrary to Hahn-Banach theorem, which requires convexity,

by choosing proper operators the problem of finding GHZ entanglement witnesses

can be reduced to linear programming problem. We see that a spin chain with

periodic boundary conditions is a good model system to introduce new class of

parameterized witnesses. Also, one can find the proper entanglement witness by

generalizing entangled densities, here, using the mixed entangled density of a

non-interacting Fermi gas leads to a proper GHZ witness. It is shown for three

non-interacting Fermions that all types of entanglement as well as biseparable

states exist. We also show PPT entangled states in non-interacting Fermi gas

which can be detected by our optimal Non-decomposable GHZ witness. Finally we

confirm that pure Bell states, i.e., three party entanglement without any

biseparable mixture, do not exist in a non-interacting Fermi gas.

\\ ( http://arxiv.org/abs/0805.3180 , 36kb)

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arXiv:0805.3239

Date: Wed, 21 May 2008 09:44:51 GMT (16kb)

Title: A robust system for Quantum Computation using Coherent Population Trap

states of neutral atoms

Authors: Ashok Vudayagiri

Categories: quant-ph

Comments: 10 pages, 3 figures, submitted to PRA rapid comm

\\

A robust system for use of Quantum Computation using neutral atoms is

presented in this communication. This scheme exploits a multilevel atomic

system interacting with two lasers in such a way that it leads to formation of

two Coherent Population Trap (CPT) states. The atomic population can be pumped

alternatively between these two CPT states or any desired superposition of the

two can also be formed. These two CPT states can then be mapped to two Qubits

for Quantum Computation. Preparation of any desired state and formation of CNOT

gates are explained below. A scheme for preparing 1-D lattice of mutually

interacting spin systems, which mimic behaviour of magnetic spin systems is

also shown. Atoms in CPT states do not interact with the lasers that prepare it

and hence are free of perturbation. The states involved here are also made up

of only ground states of bare atoms and hence are free of decoherence due to

spontaneous emission. Thus, the configuration studied here is a good example of

a very robust system.

\\ ( http://arxiv.org/abs/0805.3239 , 16kb)

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arXiv:0805.3388

Date: Thu, 22 May 2008 18:59:32 GMT (45kb)

Title: Threshold for Chaos and Thermalization in One-Dimensional Mean-Field

Bose-Hubbard Model

Authors: Amy C. Cassidy, Douglas Mason, Vanja Dunjko, Maxim Olshanii

Categories: cond-mat.other cond-mat.stat-mech

Comments: 5 pages, 3 figures

\\

We study the threshold for chaos and its relation to thermalization in the 1D

mean-field Bose-Hubbard model, which in particular describes atoms in optical

lattices. We identify the threshold for chaos and show that it is indeed a

precursor of thermalization. Far above the threshold, the state of the system

after relaxation is governed by the usual laws of statistical mechanics.

\\ ( http://arxiv.org/abs/0805.3388 , 45kb)

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arXiv:0805.3348

Date: Wed, 21 May 2008 20:03:50 GMT (625kb)

Title: Optimal light storage in atomic vapor

Authors: Nathaniel B. Phillips, Alexey V. Gorshkov, and Irina Novikova

Categories: quant-ph

Comments: 10 pages, 9 figures

\\

We study procedures for the optimization of efficiency of light storage and

retrieval based on the dynamic form of electromagnetically induced transparency

(EIT) in warm Rb vapor. We present a detailed analysis of two recently

demonstrated optimization protocols: a time-reversal-based iteration procedure,

which finds the optimal input signal pulse shape for any given control field,

and a procedure based on the calculation of an optimal control field for any

given signal pulse shape. We verify that the two procedures are consistent with

each other, and that they both independently achieve the maximum memory

efficiency for any given optical depth. We observe good agreement with

theoretical predictions for moderate optical depths (<25), while at higher

optical depths the experimental efficiency falls below the theoretically

predicted values. We identify possible effects responsible for this reduction

in memory efficiency.

\\ ( http://arxiv.org/abs/0805.3348 , 625kb)

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arXiv:0805.3510

Date: Thu, 22 May 2008 17:41:07 GMT (538kb)

Title: Energy distribution and cooling of a single atom in an optical tweezer

Authors: C. Tuchendler, A. M. Lance, A. Browaeys, Y. R. P. Sortais and P.

Grangier

Categories: quant-ph

Comments: 10 pages, 6 figures, submitted to PRA

\\

We investigate experimentally the energy distribution of a single rubidium

atom trapped in a strongly focused dipole trap under various cooling regimes.

Using two different methods to measure the mean energy of the atom, we show

that the energy distribution of the radiatively cooled atom is close to

thermal. We then demonstrate how to reduce the energy of the single atom, first

by adiabatic cooling, and then by truncating the Boltzmann distribution of the

single atom. This provides a non-deterministic way to prepare the atom at low

microKelvin temperatures, close to the ground state of the trapping potential.

\\ ( http://arxiv.org/abs/0805.3510 , 538kb)

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arXiv:0710.5812

replaced with revised version Fri, 16 May 2008 06:08:09 GMT (94kb)

Title: Spatial nonlocal pair correlations in a repulsive 1D Bose gas

Authors: A. G. Sykes, D. M. Gangardt, M. J. Davis, K. Viering, M. G. Raizen,

and K. V. Kheruntsyan

Categories: cond-mat.other cond-mat.stat-mech

Comments: Final published version, modified title

Journal-ref: Phys. Rev. Lett. 100, 160406 (2008)

\\ ( http://arxiv.org/abs/0710.5812 , 94kb)

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arXiv:0712.0376

replaced with revised version Fri, 16 May 2008 18:34:12 GMT (11kb)

Title: Analog cosmology with spinor Bose-Einstein condensates

Authors: E. Calzetta

Categories: cond-mat.other

Comments: 8 pages. Fixed typos and updated references

\\ ( http://arxiv.org/abs/0712.0376 , 11kb)

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arXiv:0804.1220

replaced with revised version Fri, 16 May 2008 10:02:50 GMT (4kb)

Title: The model charged spinless nonideal Bose gas within finite temperatures

Authors: V. N. Minasyan

Categories: cond-mat.supr-con

Comments: 8 pages

\\ ( http://arxiv.org/abs/0804.1220 , 4kb)

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arXiv:0805.0847

replaced with revised version Fri, 16 May 2008 13:35:25 GMT (840kb)

Title: Properties of rotating two-component Bose-Einstein Condensates

Authors: I. Corro, R.G. Scott and A.M. Martin

Categories: cond-mat.other quant-ph

Comments: 5 pages, 3 figures; corrected typos in equations, added references,

some rewording

\\ ( http://arxiv.org/abs/0805.0847 , 840kb)

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arXiv:0802.2902

replaced with revised version Thu, 15 May 2008 14:19:57 GMT (896kb)

Title: Reflection of OH molecules from magnetic mirrors

Authors: Markus Metsala, Joop J. Gilijamse, Steven Hoekstra, Sebastiaan Y. T.

van de Meerakker, and Gerard Meijer

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

Comments: 10 pages, 5 figures

Journal-ref: New Journal of Physics 10 (2008) 053018

DOI: 10.1088/1367-2630/10/5/053018

\\ ( http://arxiv.org/abs/0802.2902 , 896kb)

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arXiv:0711.4065

replaced with revised version Mon, 19 May 2008 08:24:12 GMT (613kb)

Title: FFLO state in 1, 2, and 3 dimensional optical lattices combined with a

non-uniform background potential

Authors: T.K. Koponen, T. Paananen, J.-P. Martikainen, M.R. Bakhtiari, and P.

Torma

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

Comments: 18 pages, 10 figures, journal version

Journal-ref: New Journal of Physics 10 (2008) 045104

\\ ( http://arxiv.org/abs/0711.4065 , 613kb)

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arXiv:0801.3127

replaced with revised version Sun, 18 May 2008 11:10:02 GMT (43kb)

Title: Phase Diagram of Cold Polarized Fermi Gas in Two Dimensions

Authors: Lianyi He and Pengfei Zhuang

Categories: cond-mat.supr-con cond-mat.other cond-mat.str-el physics.atom-ph

Comments: V3: extended version according to referee's comment. 12 pages, 6

figures. Analytical results of density profile in trapped system are reported

\\ ( http://arxiv.org/abs/0801.3127 , 43kb)

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arXiv:0804.4861

replaced with revised version Tue, 20 May 2008 10:22:27 GMT (74kb)

Title: Interfacing light and single atoms with a lens

Authors: Meng Khoon Tey, Syed Abdullah Aljunid, Florian Huber, Brenda Chng,

Zilong Chen, Gleb Maslennikov and Christian Kurtsiefer

Categories: quant-ph

Comments: 18 pages, 8 figures; typos corrected

\\ ( http://arxiv.org/abs/0804.4861 , 74kb)

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arXiv:0704.3275

replaced with revised version Wed, 21 May 2008 16:52:05 GMT (187kb)

Title: Matter-wave interference in s-wave and p-wave Fermi condensates

Authors: Wei Zhang and C. A. R. Sa de Melo

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

Comments: 8 pages, 5 figures; Phys. Rev. A 76, 013627 (2007)

Journal-ref: Phys. Rev. A 76, 013627 (2007)

DOI: 10.1103/PhysRevA.76.013627

\\ ( http://arxiv.org/abs/0704.3275 , 187kb)

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arXiv:0706.1253

replaced with revised version Wed, 21 May 2008 16:42:17 GMT (303kb)

Title: Finite temperature phase diagram of trapped Fermi gases with population

imbalance

Authors: Wei Zhang and L.-M. Duan

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

Comments: 9 pages, 7 figures

Journal-ref: Phys. Rev. A 76, 042710 (2007)

DOI: 10.1103/PhysRevA.76.042710

\\ ( http://arxiv.org/abs/0706.1253 , 303kb)

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arXiv:0802.0700

replaced with revised version Wed, 21 May 2008 17:15:53 GMT (423kb)

Title: Characteristics of Bose-Einstein condensation in an optical lattice

Authors: G.-D. Lin, Wei Zhang, and L.-M. Duan

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

Comments: 12 pages, 13 figures; Revised version with new figures; Phys. Rev. A

77, 043626 (2008)

Journal-ref: Phys. Rev. A 77, 043626 (2008)

DOI: 10.1103/PhysRevA.77.043626

\\ ( http://arxiv.org/abs/0802.0700 , 423kb)

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arXiv:0802.3818

replaced with revised version Wed, 21 May 2008 13:41:46 GMT (63kb)

Title: Dynamical Structure Factor and Spin-Density Separation for a

Weakly-Interacting Two-Component Bose Gas

Authors: M.-C. Chung and A. B. Bhattacherjee

Categories: cond-mat.other

Comments: 4 pages, 2 figures

\\ ( http://arxiv.org/abs/0802.3818 , 63kb)

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arXiv:0803.1405

replaced with revised version Wed, 21 May 2008 06:44:39 GMT (339kb,D)

Title: Collisional Properties of p-Wave Feshbach Molecules

Authors: Yasuhisa Inada, Munekazu Horikoshi, Shuta Nakajima, Makoto

Kuwata-Gonokami, Masahito Ueda, Takashi Mukaiyama

Categories: cond-mat.other

\\ ( http://arxiv.org/abs/0803.1405 , 339kb)

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arXiv:0805.0761

replaced with revised version Wed, 21 May 2008 18:55:39 GMT (777kb)

Title: Nonlinear Waves in Bose-Einstein Condensates: Physical Relevance and

Mathematical Techniques

Authors: R. Carretero-Gonzalez, D.J. Frantzeskakis, and P.G. Kevrekidis

Categories: cond-mat.other

Comments: 69 pages, 10 figures, to appear in Nonlinearity, 2008. V2: new

references added, fixed typos

\\ ( http://arxiv.org/abs/0805.0761 , 777kb)

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arXiv:0805.0847

replaced with revised version Wed, 21 May 2008 06:51:59 GMT (840kb)

Title: Properties of rotating two-component Bose-Einstein Condensates

Authors: I. Corro, R.G. Scott and A.M. Martin

Categories: cond-mat.other quant-ph

Comments: 5 pages, 3 figures; corrected typos in equations, added references,

some rewording; added a reference

\\ ( http://arxiv.org/abs/0805.0847 , 840kb)

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Till next time,

Matt.

-- ========================================================================= Dr M. J. Davis, Senior Lecturer in Physics School of Physical Sciences, email: mdavis_at_physics.uq.edu.au University of Queensland, ph : +61 7 334 69824 Brisbane, QLD 4072, fax : +61 7 336 51242 Australia. http://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 Wed Jun 11 2008 - 11:38:17 EST

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