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

Date: Tue, 26 Oct 2010 22:32:16 +1000

Date: Tue, 26 Oct 2010 22:32:16 +1000

Dear subscribers,

This week's selection was compiled by Chris Foster, and contains 20 new

abstracts and 20 replacements.

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arXiv:1008.3770

Date: Mon, 23 Aug 2010 08:02:54 GMT (210kb)

Title: Correlated bosons in a one-dimensional optical lattice: Effects of the

trapping potential and of quasiperiodic disorder

Authors: Uttam Shrestha and Michele Modugno

Categories: cond-mat.quant-gas

Comments: Accepted for publication in PRA

\\

We investigate the effect of the trapping potential on the quantum phases of

strongly correlated ultracold bosons in one-dimensional periodic and

quasiperiodic optical lattices. By means of a decoupling meanfield approach, we

characterize the ground state of the system and its behavior under variation of

the harmonic trapping, as a function of the total number of atoms. For a small

atom number the system shows an incompressible Mott-insulating phase, as the

size of the cloud remains unaffected when the trapping potential is varied.

When the quasiperiodic potential is added the system develops a

metastable-disordered phase which is neither compressible nor Mott insulating.

This state is characteristic of quasidisorder in the presence of a strong

trapping potential.

\\ ( http://arxiv.org/abs/1008.3770 , 210kb)

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arXiv:1008.3856 (*cross-listing*)

Date: Mon, 23 Aug 2010 16:53:29 GMT (980kb,D)

Title: Electric field-dependent dynamic polarizability and "magic'' conditions

for optical trapping of polar molecules

Authors: Svetlana Kotochigova and David DeMille

Categories: quant-ph physics.atom-ph

Comments: 10 pages, 4 figures

\\

Selection of ``magic'' trapping conditions with ultracold atoms or molecules,

where pairs of internal states experience identical trapping potentials, brings

substantial benefits to precision measurements and quantum computing schemes.

Working at such conditions could ensure that detrimental effects of inevitable

inhomogeneities across an ultracold sample are significantly reduced. However,

this aspect of confinement remains unexplored for ultracold polar molecules.

Here, we present means to control the AC Stark shift of rotational states of

ultracold polar molecules, when subjected to both trapping laser light and an

external electric field. We show that both the strength and relative

orientation of the two fields influence the trapping potential. In particular,

we predict ``magic electric field strengths" and a ``magic angle", where the

Stark shift is independent of the DC external field and rotational states of

the molecule.

\\ ( http://arxiv.org/abs/1008.3856 , 980kb)

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arXiv:1008.3876

Date: Mon, 23 Aug 2010 18:21:19 GMT (500kb)

Title: Dissipative fluid dynamics for the dilute Fermi gas at unitarity: Free

expansion and rotation

Authors: Thomas Schaefer (North Carolina State University)

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

Comments: 28 pages, 13 figures

\\

We investigate the expansion dynamics of a dilute Fermi gas at unitarity in

the context of dissipative fluid dynamics. Our aim is to quantify the effects

of shear viscosity on the time evolution of the system. We compare exact

numerical solutions of the equations of viscous hydrodynamics to various

approximations that have been proposed in the literature. Our main findings

are: i) Shear viscosity leads to characteristic features in the expansion

dynamics; ii) a quantitative description of these effects has to include

reheating; iii) dissipative effects are not sensitive to the equation of state

P(n,T) as long as the universal relation P=(2/3)E is satisfied; iv) the

expansion dynamics mainly constrains the cloud average of the shear viscosity.

\\ ( http://arxiv.org/abs/1008.3876 , 500kb)

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arXiv:1008.3884 (*cross-listing*)

Date: Mon, 23 Aug 2010 18:49:21 GMT (34kb)

Title: Spin 1/2 Fermions in the Unitary Limit.III

Authors: H. S. Kohler

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

Comments: 9 pages,5 figures

\\

In scattering theory, the unitary limit is defined by an infinite

scattering-length and a zero effective range, corresponding to a phase-shift

\pi/2, independent of energy. This condition is satisfied by a rank-1 separable

potential V(k,k')=-v(k)v(k') with

v^{2}(k)=(4\pi)^{2}(\Lambda^{2}-k^{2})^{-1/2}, \Lambda being the cut-off in

momentum space.Previous calculations using a Pauli-corrected ladder summation

to calculate the energy of a zero temperature many body system of spin 1/2

fermions with this interaction gave \xi=0.24 (in units of kinetic energy)

independent of density and with \Lambda---->infinity. This value of \xi is

appreciably smaller than the experimental and that obtained from other

calculations, most notably from Monte Carlo, which in principle would be the

most reliable. Our previous work did however also show a strong dependence on

effective range r_0 (with r_0=0 at unitarity). With an increase to r_0=1.0 the

energy varied from \xi~0.38 at k_f=0.6 1/fm to ~0.45 at k_f=1.8 1/fm which is

somewhat closer to the Monte-Carlo results. These previous calculations are

here extended by including the effect of the previously neglected mean-field

propagation, the dispersion correction. This is repulsive and found to increase

drastically with decreasing effective range. It is large enough to suggest a

revised value of \xi~0.4 <--> ~0.5 independent of r_0. Off-shell effects are

also investigated by introducing a rank-2 (phase-shift equivalent) separable

potential. Effects of 10% or more in energy could be demonstrated for r_0>0. It

is pointed out that a computational cut-off in momentum-space brings in another

scale in the in otherwise scale-less unitary problem.

\\ ( http://arxiv.org/abs/1008.3884 , 34kb)

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arXiv:1008.3910 (*cross-listing*)

Date: Mon, 23 Aug 2010 20:01:13 GMT (561kb,D)

Title: Interferometry with Synthetic Gauge Fields

Authors: Brandon M. Anderson and Jacob M. Taylor and Victor M. Galitski

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

\\

We propose a compact atom interferometry scheme for measuring weak,

time-dependent accelerations. Our proposal uses an ensemble of dilute trapped

bosons with two internal states that couple to a synthetic gauge field with

opposite charges. The trapped gauge field couples spin to momentum to allow

time dependent accelerations to be continuously imparted on the internal

states. We generalize this system to reduce noise and estimate the sensitivity

of such a system to be S~10^-7 m / s^2 / Hz^1/2.

\\ ( http://arxiv.org/abs/1008.3910 , 561kb)

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arXiv:1008.3933

Date: Mon, 23 Aug 2010 22:36:54 GMT (1318kb)

Title: The Unitary Fermi Gas: From Monte Carlo to Density Functionals

Authors: Aurel Bulgac, Michael McNeil Forbes, and Piotr Magierski

Categories: cond-mat.quant-gas

Comments: 84 pages, 20 figures, to be published as a chapter in BCS-BEC

Crossover and the Unitary Fermi Gas (Lecture Notes in Physics), edited by W.

Zwerger (Springer, 2011)

Report-no: LA-UR 10-05509, INT-PUB-10-037, NW_at_UW-10-18

\\

In this chapter, we describe three related studies of the universal physics

of two-component unitary Fermi gases with resonant short-ranged interactions.

First we discuss an ab initio auxiliary field quantum Monte Carlo technique for

calculating thermodynamic properties of the unitary gas from first principles.

We then describe in detail a Density Functional Theory (DFT) fit to these

thermodynamic properties: the Superfluid Local Density Approximation (SLDA) and

its Asymmetric (ASLDA) generalization. We present several applications,

including vortex structure, trapped systems, and a supersolid

Larkin-Ovchinnikov (FFLO/LOFF) state. Finally, we discuss the time-dependent

extension to the density functional (TDDFT) which can describe quantum dynamics

in these systems, including non-adiabatic evolution, superfluid to normal

transitions and other modes not accessible in traditional frameworks such as a

Landau-Ginzburg, Gross-Pitaevskii, or quantum hydrodynamics.

\\ ( http://arxiv.org/abs/1008.3933 , 1318kb)

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arXiv:1008.3960

Date: Tue, 24 Aug 2010 04:18:20 GMT (270kb)

Title: Dynamic response of strongly correlated Fermi gases in the quantum

virial expansion

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

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

Comments: 5 pages, 4 figures; published version in Phys. Rev. A. The quantum

virial expansion of single-particle spectral function is discussed in

arXiv:1003.1538 (Phys. Rev. Lett. 104, 240407 (2010))

Journal-ref: Phys. Rev. A 81, 033630 (2010)

DOI: 10.1103/PhysRevA.81.033630

\\

By developing a quantum virial expansion theory, we quantitatively calculate

the dynamic density response function of a trapped strongly interacting Fermi

gas at high temperatures near unitarity. A clear transition from atomic to

molecular responses is identified in the spectra when crossing from the BCS to

BEC regimes, in qualitative agreement with recent Bragg spectroscopy

observations. Our virial expansion method provides a promising way to solve the

challenging strong-coupling problems and is applicable to other dynamical

properties of strongly correlated Fermi gases.

\\ ( http://arxiv.org/abs/1008.3960 , 270kb)

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arXiv:1008.4114

Date: Tue, 24 Aug 2010 19:24:15 GMT (106kb)

Title: Optimal Gaussian squeezed states for atom-interferometry in the presence

of phase diffusion

Authors: Igor Tikhonenkov, Michael G. Moore, and Amichay Vardi

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

Comments: 8 pages, 6 figures

\\

We optimize the signal-to-noise ratio of a Mach-Zehnder atom interferometer

with Gaussian squeezed input states, in the presence interactions. For weak

interactions, our results coincide with Phys. Rev. Lett. {\bf 100}, 250406

(2008), with optimal initial number-variance $\sigma_o\propto N^{1/3}$ and

optimal signal-to-noise ratio $s_o\propto N^{2/3}$ for total atom number $N$.

As the interaction strength $u$ increases past unity, phase-diffusion becomes

dominant, leading to a transition in the optimal squeezing from initial

number-squeezing to initial {\it phase}-squeezing with

$\sigma_o\propto\sqrt{uN}$ and $s_o\propto\sqrt{N/u}$ shot-noise scaling. The

initial phase-squeezing translates into hold-time number-squeezing, which is

less sensitive to interactions than coherent states and improves $s_o$ by a

factor of $\sqrt{u}$.

\\ ( http://arxiv.org/abs/1008.4114 , 106kb)

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arXiv:1008.4143 (*cross-listing*)

Date: Tue, 24 Aug 2010 20:21:22 GMT (245kb)

Title: Bose-Einstein condensation in perfect crystals

Authors: V. A. Golovko

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

Comments: 26 pages

\\

To investigate the phenomenon of Bose-Einstein condensation in perfect

crystals a hierarchy of equations for reduced density matrices that describes a

thermodynamically equilibrium quantum system is employed, the hierarchy being

obtained earlier by the author. The thermodynamics of a crystal with a

condensate and the one of a crystal with no condensate are constructed in

parallel, which is required for studying the phase transition involving

Bose-Einstein condensation. The transition is analysed also with the help of

the Landau theory of phase transitions which shows that a superfluid state can

result either from two consecutive phase transitions or from only one. To

demonstrate how the general equations obtained can be applied for a concrete

crystal the bifurcation method for solving the equations is utilized. New

results concerning properties of the condensate crystals at zero temperature

are obtained as well. In the concluding section, the physical concept of the

condensate is discussed.

\\ ( http://arxiv.org/abs/1008.4143 , 245kb)

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arXiv:1008.4200 (*cross-listing*)

Date: Wed, 25 Aug 2010 04:52:31 GMT (16kb)

Title: Radiation from accelerated impurities in Bose-Einstein condensate

Authors: Jun Suzuki

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

Comments: 8 pages

\\

We investigate radiation spectra arising from accelerated point-like

impurities in the homogeneous Bose-Einstein condensate. A general formula for

the radiation spectrum is obtained in the integral form as a function of given

impurity trajectory. The Planckian spectrum is obtained for a special

accelerated motion, which is shown to be unphysical. Non-Planckian spectrum is

found in the case of a uniformly accelerated impurity. We compare our result

with similar settings as discussed in other quantum many-body systems.

\\ ( http://arxiv.org/abs/1008.4200 , 16kb)

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arXiv:1008.4273

Date: Wed, 25 Aug 2010 13:38:06 GMT (163kb)

Title: Optically trapped quasi-two-dimensional Bose gases in random

environment: quantum fluctuations and superfluid density

Authors: Kezhao Zhou, Ying Hu, Zhaoxin Liang and Zhidong Zhang

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

Comments: 8 pages, 2 figures

\\

We investigate a dilute Bose gas confined in a tight one-dimensional (1D)

optical lattice plus a superimposed random potential at zero temperature.

Accordingly, the ground state energy, quantum depletion and superfluid density

are calculated. The presence of the lattice introduces a crossover to the

quasi-2D regime, where we analyze asymptotically the 2D behavior of the system,

particularly the effects of disorder. We thereby offer an analytical expression

for the ground state energy of a purely 2D Bose gas in a random potential. The

obtained disorder-induced normal fluid density $n_n$ and quantum depletion

$n_d$ both exhibit a characteristic $1/\ln\left(1/n_{2D}a_{2D}^{2}\right)$

dependence. Their ratio $n_n/n_d$ increases to $2$ compared to the familiar

$4/3$ in lattice-free 3D geometry, signifying a more pronounced contrast

between superfluidity and Bose-Einstein condensation in low dimensions.

Conditions for possible experimental realization of our scenario are also

proposed.

\\ ( http://arxiv.org/abs/1008.4273 , 163kb)

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arXiv:1008.4324

Date: Wed, 25 Aug 2010 17:56:39 GMT (23kb)

Title: Peer-review in a world with rational scientists: Toward selection of the

average

Authors: Stefan Thurner and Rudolf Hanel

Categories: physics.soc-ph

Comments: 5 pages 4 figures

\\

One of the virtues of peer review is that it provides a self-regulating

selection mechanism for scientific work, papers and projects. Peer review as a

selection mechanism is hard to evaluate in terms of its efficiency. Serious

efforts to understand its strengths and weaknesses have not yet lead to clear

answers. In theory peer review works if the involved parties (editors and

referees) conform to a set of requirements, such as love for high quality

science, objectiveness, and absence of biases, nepotism, friend and clique

networks, selfishness, etc. If these requirements are violated, what is the

effect on the selection of high quality work? We study this question with a

simple agent based model. In particular we are interested in the effects of

rational referees, who might not have any incentive to see high quality work

other than their own published or promoted. We find that a small fraction of

incorrect (selfish or rational) referees can drastically reduce the quality of

the published (accepted) scientific standard. We quantify the fraction for

which peer review will no longer select better than pure chance. Decline of

quality of accepted scientific work is shown as a function of the fraction of

rational and unqualified referees. We show how a simple quality-increasing

policy of e.g. a journal can lead to a loss in overall scientific quality, and

how mutual support-networks of authors and referees deteriorate the system.

\\ ( http://arxiv.org/abs/1008.4324 , 23kb)

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arXiv:1008.4380

Date: Wed, 25 Aug 2010 21:03:31 GMT (10kb)

Title: Vortex density waves and high-frequency second sound in superfluid

turbulence hydrodynamics

Authors: David Jou, Maria Stella Mongiovi'and Michele Sciacca

Categories: cond-mat.other

Comments: 8 pages

Journal-ref: Physics Letters A 368 (2007) 7

\\

In this paper we show that a recent hydrodynamical model of superfluid

turbulence describes vortex density waves and their effects on the speed of

high-frequency second sound. In this frequency regime, the vortex dynamics is

not purely diffusive, as for low frequencies, but exhibits ondulatory features,

whose influence on the second sound is here explored.

\\ ( http://arxiv.org/abs/1008.4380 , 10kb)

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arXiv:1008.4381

Date: Wed, 25 Aug 2010 21:08:50 GMT (21kb)

Title: A mathematical model of counterflow superfluid turbulence describing

heat waves and vortex-density waves

Authors: Michele Sciacca, Maria Stella Mongiovi' and David Jou

Categories: cond-mat.other

Comments: 20 pages

Journal-ref: Mathematical and Computer Modelling 48 (2008) 206

\\

The interaction between vortex density waves and high-frequency second sound

in counterflow superfluid turbulence is examined, incorporating diffusive and

elastic contributions of the vortex tangle. The analysis is based on a set of

evolution equations for the energy density, the heat flux, the vortex line

density, and the vortex flux, the latter being considered here as an

independent variable, in contrast to previous works. The latter feature is

crucial in the transition from diffusive to propagative behavior of vortex

density perturbations, which is necessary to interpret the details of

high-frequency second sound.

\\ ( http://arxiv.org/abs/1008.4381 , 21kb)

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arXiv:1008.4383

Date: Wed, 25 Aug 2010 21:13:39 GMT (50kb)

Title: Local Correlations in the Super Tonks-Girardeau Gas

Authors: M. Kormos, G. Mussardo, A. Trombettoni

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

\\

We study the local correlations in the super Tonks-Girardeau gas, a highly

excited, strongly correlated state obtained in quasi one-dimensional Bose gases

by tuning the scattering length to large negative values using a

confinement-induced resonance. Exploiting a connection with a relativistic

field theory, we obtain results for the two-body and three-body local

correlators at zero and finite temperature. At zero temperature our result for

the three-body correlator agrees with the extension of the results of Cheianov

et al. [Phys. Rev. A 73, 051604(R) (2006)], obtained for the ground-state of

the repulsive Lieb-Liniger gas, to the super Tonks-Girardeau state. At finite

temperature we obtain that the three-body correlator has a weak dependence on

the temperature up to the degeneracy temperature. We also find that for

temperatures larger than the degeneracy temperature the values of the

three-body correlator for the super Tonks-Girardeau gas and the corresponding

repulsive Lieb-Liniger gas are rather similar even for relatively small

couplings.

\\ ( http://arxiv.org/abs/1008.4383 , 50kb)

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arXiv:1008.4390

Date: Wed, 25 Aug 2010 21:31:26 GMT (183kb)

Title: Non-equilibrium thermodynamics analysis of rotating counterflow

superfluid turbulence

Authors: Michele Sciacca

Categories: cond-mat.other

Comments: 18 pages, 3 figures

Journal-ref: Mathematical and Computer Modelling 51 (2010) 91

\\

In two previous papers two evolution equations for the vortex line density

$L$, proposed by Vinen, were generalized to rotating superfluid turbulence and

compared with each other. Here, the already generalized alternative Vinen

equation is extended to the case in which counterflow and rotation are not

collinear. Then, the obtained equation is considered from the viewpoint of

non-equilibrium thermodynamics. According with this formalism, the

compatibility between this evolution equation for $L$ and that one for the

velocity of the superfluid component is studied. The compatibility condition

requires the presence of a new term dependent on the anisotropy of the tangle,

which indicates how the friction force depends on the rotation rate.

\\ ( http://arxiv.org/abs/1008.4390 , 183kb)

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arXiv:1008.4426

Date: Thu, 26 Aug 2010 04:26:21 GMT (2167kb)

Title: Numerical simulation of a multi-level atom interferometer

Authors: Brynle Barrett, Itay Yavin, Scott Beattie and A. Kumarakrishnan

Categories: physics.atom-ph physics.comp-ph quant-ph

Comments: 18 pages, 13 figures, version accepted to Physical Review A

\\

We present a comprehensive numerical simulation of an echo-type atom

interferometer. The simulation confirms a new theoretical description of this

interferometer that includes effects due to spontaneous emission and magnetic

sub-levels. Both the simulation and the theoretical model agree with the

results of experiments. These developments provide an improved understanding of

several observable effects. The evolution of state populations due to

stimulated emission and absorption during the standing wave interaction imparts

a time-dependent phase on each atomic momentum state. This manifests itself as

an asymmetry in the signal shape that depends on the strength of the

interaction as well as spontaneous emission due to a non-zero population in the

excited states. The degree of asymmetry is a measure of a non-zero relative

phase between interfering momentum states.

\\ ( http://arxiv.org/abs/1008.4426 , 2167kb)

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arXiv:1008.4428 (*cross-listing*)

Date: Thu, 26 Aug 2010 04:42:52 GMT (1184kb)

Title: Localized collapse and revival of coherence in an ultracold Bose gas

Authors: J.M. McGuirk and L.F. Zajiczek

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

Comments: 5 pages, 4 figures

\\

We study the collapse and revival of coherence induced by dipolar spin waves

in a trapped gas of Rb-87 atoms. In particular we observe spatially localized

collapse and revival of Ramsey fringe contrast and show how the pattern of

coherence depends on strength of the spin wave excitation. We find that the

spatial character of the coherence dynamics is incompatible with a simple model

based only on position-space overlap of wave functions. This phenomenon

requires a full phase-space description of the atomic spin using a quantum

Boltzmann transport equation, which highlights spin wave-induced coherent spin

currents and the ensuing dynamics they drive.

\\ ( http://arxiv.org/abs/1008.4428 , 1184kb)

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arXiv:1008.4512

Date: Thu, 26 Aug 2010 13:51:42 GMT (83kb,D)

Title: Two-electron excitation of an interacting cold Rydberg gas

Authors: J. Millen, G. Lochead and M. P. A. Jones

Categories: physics.atom-ph physics.plasm-ph

Comments: 5 pages, 5 figures

\\

We report the creation of an interacting cold Rydberg gas of strontium atoms.

We show that the excitation spectrum of the inner valence electron is sensitive

to the interactions in the Rydberg gas, even though they are mediated by the

outer Rydberg electron. By studying the evolution of this spectrum we observe

density-dependent population transfer to a state of higher angular momentum l.

We determine the fraction of Rydberg atoms transferred, and identify the

dominant transfer mechanism to be l-changing electron-Rydberg collisions

associated with the formation of a cold plasma.

\\ ( http://arxiv.org/abs/1008.4512 , 83kb)

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arXiv:1008.4521

Date: Thu, 26 Aug 2010 14:14:20 GMT (94kb)

Title: Functional renormalization group approach to interacting bosons at zero

temperature

Authors: Andreas Sinner, Nils Hasselmann, and Peter Kopietz

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

Comments: 17 pages, 10 figures

\\

We investigate the single-particle spectral density of interacting bosons

within the non-perturbative functional renormalization group technique. The

flow equations for a Bose gas are derived in a scheme which treats the

two-particle density-density correlations exactly but neglects irreducible

correlations among three and more particles. These flow equations are solved

within a truncation which allows to extract the complete frequency and momentum

structure of the normal and anomalous self-energies. Both the asymptotic small

momentum regime, where perturbation regime fails, as well as the perturbative

regime at larger momenta are well described within a single unified approach.

The self-energies do not exhibit any infrared divergences, satisfy the U(1)

symmetry constraints, and are in accordance with the Nepomnyashchy relation

which states that the anomalous self-energy vanishes at zero momentum and zero

frequency. From the self-energies we extract the single-particle spectral

density of the two-dimensional Bose gas. The dispersion is found to be of the

Bogoliubov form and shows the crossover from linear Goldstone modes to the

quadratic behavior of quasi-free bosons. The damping of the quasiparticles is

found to be in accordance with the standard Beliaev damping. We furthermore

recover the exact asymptotic limit of the propagators derived by Gavoret and

Nozieres and discuss the nature of the non-analyticities of the self-energies

in the very small momentum regime.

\\ ( http://arxiv.org/abs/1008.4521 , 94kb)

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The replacements:

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arXiv:0912.1955

replaced with revised version Thu, 19 Aug 2010 21:08:25 GMT (19kb)

Title: Derivation of the effective action of a dilute Fermi gas in the unitary

limit of the BCS-BEC crossover

Authors: Adriaan M. J. Schakel

Categories: cond-mat.quant-gas

Comments: 13 pages, no figures; v2: discussion of one-dimensional system and

references added

\\ ( http://arxiv.org/abs/0912.1955 , 19kb)

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arXiv:1006.1295 (*cross-listing*)

replaced with revised version Fri, 20 Aug 2010 20:18:32 GMT (729kb)

Title: Observation of a red-blue detuning asymmetry in matter-wave

superradiance

Authors: L.Deng, E. W. Hagley, Qiang Cao, Xiaorui Wang, Xinyu Luo, Ruquan Wang,

Fan Yang, Xiaoji Zhou, Xuzong Chen, M. G. Payne and Mingsheng Zhan

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

Comments: The original version of this manuscript was first submitted in early

March, 2010 to Physical Review A Rapid Communications

\\ ( http://arxiv.org/abs/1006.1295 , 729kb)

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arXiv:1008.0217

replaced with revised version Sat, 21 Aug 2010 04:39:42 GMT (196kb)

Title: Computational Theory of a splitting BEC using a Generalized Wannier

basis I: Theory and Statics

Authors: Douglas K. Faust and William P. Reinhardt

Categories: cond-mat.quant-gas

Comments: 29 pages, 8 figures

\\ ( http://arxiv.org/abs/1008.0217 , 196kb)

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arXiv:1008.0240

replaced with revised version Sat, 21 Aug 2010 07:13:18 GMT (15kb)

Title: The p=0 condensate is a myth

Authors: Yatendra S. Jain

Categories: cond-mat.quant-gas

Comments: 9 pages including 1 figure

\\ ( http://arxiv.org/abs/1008.0240 , 15kb)

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arXiv:1007.0281 (*cross-listing*)

replaced with revised version Sat, 21 Aug 2010 14:13:09 GMT (2164kb)

Title: Phase fluctuations in anisotropic Bose condensates: from cigars to rings

Authors: L. Mathey, A. Ramanathan, K. C. Wright, S. R. Muniz, W. D. Phillips

and Charles W. Clark

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

Comments: 10 pages, 5 figures, minor edits

\\ ( http://arxiv.org/abs/1007.0281 , 2164kb)

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arXiv:0912.3192

replaced with revised version Sat, 21 Aug 2010 16:13:40 GMT (472kb,D)

Title: Quantum Field Theory for the Three-Body Constrained Lattice Bose Gas --

Part I: Formal Developments

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

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

Comments: 21 pages, 5 figures

Journal-ref: Phys. Rev. B 82, 064509 (2010)

DOI: 10.1103/PhysRevB.82.064509

\\ ( http://arxiv.org/abs/0912.3192 , 472kb)

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arXiv:0912.3196

replaced with revised version Sat, 21 Aug 2010 16:24:37 GMT (865kb,D)

Title: Quantum Field Theory for the Three-Body Constrained Lattice Bose Gas --

Part II: Application to the Many-Body Problem

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

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

Comments: 22 pages, 5 figures

Journal-ref: Phys. Rev. B 82, 064510 (2010)

DOI: 10.1103/PhysRevB.82.064510

\\ ( http://arxiv.org/abs/0912.3196 , 865kb)

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arXiv:1005.4213

replaced with revised version Sat, 21 Aug 2010 17:45:42 GMT (320kb)

Title: Cold matter trapping via rotating helical optical potential

Authors: A.Yu.Okulov

Categories: physics.atom-ph cond-mat.quant-gas nlin.PS physics.optics

Comments: 13 pages, 3 figures, submitted to referred journal

\\ ( http://arxiv.org/abs/1005.4213 , 320kb)

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arXiv:1006.0506

replaced with revised version Sun, 22 Aug 2010 11:14:33 GMT (10kb)

Title: Geometric Symmetries in Superfluid Vortex Dynamics

Authors: Evgeny Kozik and Boris Svistunov

Categories: cond-mat.other physics.flu-dyn

Comments: 4 REVTeX pages, minor stylistic changes, references to recent related

preprints added

\\ ( http://arxiv.org/abs/1006.0506 , 10kb)

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arXiv:1005.2635

replaced with revised version Mon, 23 Aug 2010 16:13:49 GMT (88kb)

Title: Coherence freeze in an optical lattice investigated via pump-probe

spectroscopy

Authors: Samansa Maneshi, Chao Zhuang, Christopher R. Paul, Luciano S. Cruz,

and Aephraim M. Steinberg

Categories: quant-ph

Comments: 4 pages, 5 figures

\\ ( http://arxiv.org/abs/1005.2635 , 88kb)

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arXiv:1004.5443

replaced with revised version Tue, 24 Aug 2010 03:54:39 GMT (97kb)

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

gases: Beyond the local density approximation

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

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

Comments: 7 pages, 5 figures; published version in Phys. Rev. A

Journal-ref: Phys. Rev. A 82, 013627 (2010)

DOI: 10.1103/PhysRevA.82.013627

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

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arXiv:1003.3511

replaced with revised version Tue, 24 Aug 2010 04:00:51 GMT (167kb)

Title: Static structure factor of a strongly correlated Fermi gas at large

momenta

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

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

Comments: 8 pages, 3 figures; revised according to the Referee's suggestions;

publised version

Journal-ref: Europhys. Lett. 91, 20005 (2010)

DOI: 10.1209/0295-5075/91/20005

\\ ( http://arxiv.org/abs/1003.3511 , 167kb)

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arXiv:1003.1538

replaced with revised version Tue, 24 Aug 2010 04:06:48 GMT (944kb)

Title: Pseudo-gap pairing in ultracold Fermi atoms

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

Categories: cond-mat.quant-gas

Comments: 4 pages, 4 figures; add comparison with the JILA pseudogap

measurement (Nature Physics); published version in Phys. Rev. Lett

Journal-ref: Phys. Rev. Lett. 104, 240407 (2010)

DOI: 10.1103/PhysRevLett.104.240407

\\ ( http://arxiv.org/abs/1003.1538 , 944kb)

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arXiv:1001.2085

replaced with revised version Tue, 24 Aug 2010 04:09:52 GMT (427kb)

Title: Universal thermodynamics of a strongly interacting Fermi gas: theory

versus experiment

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

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

Comments: 15 pages, 11 figures, and 2 tables; published version in New Journal

of Physics

Journal-ref: New J. of Phys. 12, 063038 (2010)

DOI: 10.1088/1367-2630/12/6/063038

\\ ( http://arxiv.org/abs/1001.2085 , 427kb)

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arXiv:1006.0509

replaced with revised version Tue, 24 Aug 2010 10:56:07 GMT (964kb)

Title: Orbital superfluidity in the $P$-band of a bipartite optical square

lattice

Authors: Georg Wirth, Matthias \"Olschl\"ager, and Andreas Hemmerich

Categories: cond-mat.quant-gas

Comments: 5 pages, 5 figures

\\ ( http://arxiv.org/abs/1006.0509 , 964kb)

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arXiv:0912.4236

replaced with revised version Wed, 25 Aug 2010 15:15:58 GMT (365kb)

Title: Scaling Flows and Dissipation in the Dilute Fermi Gas at Unitarity

Authors: Thomas Schaefer (North Carolina State University) and Clifford Chafin

(North Carolina State University)

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

Comments: 32 pages, prepared for "BCS-BEC crossoverand the Unitary Fermi Gas",

Lecture Notes in Physics, W. Zwerger (editor), Fig. 5 corrected, note added

\\ ( http://arxiv.org/abs/0912.4236 , 365kb)

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arXiv:0806.1889

replaced with revised version Wed, 25 Aug 2010 20:32:04 GMT (25kb)

Title: Hydrodynamic equations of anisotropic, polarized and inhomogeneous

superfluid vortex tangles

Authors: David Jou, Maria Stella Mongiov\`i, Michele Sciacca

Categories: cond-mat.other

Comments: 21 pages

\\ ( http://arxiv.org/abs/0806.1889 , 25kb)

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arXiv:1007.0645

replaced with revised version Thu, 26 Aug 2010 14:32:05 GMT (544kb)

Title: Fluctuation-induced drift in a gravitationally tilted optical lattice

Authors: M. Zelan, H. Hagman, K. Karlsson, C. M. Dion, A. Kastberg

Categories: physics.atom-ph cond-mat.stat-mech

\\ ( http://arxiv.org/abs/1007.0645 , 544kb)

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arXiv:1008.1258

replaced with revised version Thu, 26 Aug 2010 18:35:46 GMT (577kb)

Title: Detecting many-body entanglements in noninteracting ultracold atomic

fermi gases

Authors: G. C. Levine, B. A. Friedman and M. J. Bantegui

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

Comments: 5 pages, 5 figures, fixed axes labels on figs. 3 and 5, added

references

\\ ( http://arxiv.org/abs/1008.1258 , 577kb)

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arXiv:1002.0630

replaced with revised version Thu, 26 Aug 2010 18:37:18 GMT (76kb)

Title: Relaxation of a high-energy quasiparticle in a one-dimensional Bose gas

Authors: Shina Tan, Michael Pustilnik, Leonid I. Glazman

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

Journal-ref: Phys. Rev. Lett. 105, 090404 (2010)

DOI: 10.1103/PhysRevLett.105.090404

\\ ( http://arxiv.org/abs/1002.0630 , 76kb)

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Till next time,

Matt.

-- ========================================================================= Dr M. J. Davis, Associate Professor in Physics School of Mathematics and Physics, ph : +61 7 334 69824 The University of Queensland, fax : +61 7 336 51242 Brisbane, QLD 4072, mdavis_at_physics.uq.edu.au Australia. www.physics.uq.edu.au/people/mdavis/ ========================================================================= Matt's arXiv selection: weekly summary of cold-atom papers from arXiv.org http://www.physics.uq.edu.au/people/mdavis/matts_arXiv/ ========================================================================= Legal stuff: Unless stated otherwise, this e-mail represents only the views of the sender and not the views of the University of Queensland ========================================================================= _______________________________________________ Matts-arxiv mailing list Matts-arxiv_at_lists.sps.uq.edu.auReceived on Thu Nov 04 2010 - 10:05:08 EST

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