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

Date: Wed, 3 Nov 2010 23:11:29 +1000

Date: Wed, 3 Nov 2010 23:11:29 +1000

Dear subscribers,

This week's selection was compiled by Geoff Lee, and contains 39 new

abstracts and 13 replacements.

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arXiv:1009.2017

Date: Fri, 10 Sep 2010 14:04:40 GMT (488kb,D)

Title: Tackling the blackbody shift in a strontium optical lattice clock

Authors: Thomas Middelmann, Christian Lisdat, Stephan Falke, Joseph S.R.

Vellore Winfred, Fritz Riehle, Uwe Sterr

Categories: physics.atom-ph quant-ph

Comments: 7 pages, 8 figures

\\

A major obstacle for optical clocks is the frequency shift due to black body

radiation. We discuss how one can tackle this problem in an optical lattice

clock; in our case 87-Sr: firstly, by a measurement of the dc Stark shift of

the clock transition and, secondly, by interrogating the atoms in a cryogenic

environment. Both approaches rely on transporting ultracold atoms over several

cm within a probe cycle. We evaluate this approach of mechanically moving the

optical lattice and conclude that it is feasible to transport the atoms over 50

mm within 300 ms. With this transport a dc Stark shift measurement will allow

to reduce the contribution of the blackbody radiation to the fractional

uncertainty below 2 × 10^−17 at room temperature by improving the shift

coefficient known only from atomic structure calculations up to now. We propose

a cryogenic environment at 77 K that will reduce this contribution to few parts

in 10^−18.

\\ ( http://arxiv.org/abs/1009.2017 , 488kb)

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arXiv:1009.2036 (*cross-listing*)

Date: Fri, 10 Sep 2010 15:40:26 GMT (505kb,D)

Title: Statistically induced Phase Transitions: Turning Bosons smoothly via

Anyons into Fermions

Authors: Tassilo Keilmann, Simon Lanzmich, Ian McCulloch, Marco Roncaglia

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

\\

Anyons - particles carrying fractional statistics that interpolate between

bosons and fermions - have been conjectured to exist in low dimensional

systems. In the context of the fractional quantum Hall effect (FQHE),

quasi-particles made of electrons take the role of anyons whose statistical

exchange phase is fixed by the filling factor. Here we propose an experimental

setup to create anyons in one-dimensional lattices with fully tuneable exchange

statistics. In our setup, anyons are created by bosons with

occupation-dependent hopping amplitudes, which can be realized by

laser-assisted Raman tunneling. The statistical angle can thus be controlled in

situ by modifying the relative phase of two Raman laser beams. This opens the

fascinating possibility of smoothly transmuting bosons via anyons into fermions

and of inducing a phase transition by the mere control of the particle

statistics as a free parameter. In particular, we demonstrate how to induce a

quantum phase transition from a superfluid into an exotic Mott-like state where

the particle distribution exhibits plateaus at fractional densities.

\\ ( http://arxiv.org/abs/1009.2036 , 505kb)

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arXiv:1009.2075

Date: Fri, 10 Sep 2010 19:05:06 GMT (319kb)

Title: Hyperfine, rotational, and vibrational structure of the triplet ground

state of Rb molecules

Authors: Christoph Strauss, Tetsu Takekoshi, Florian Lang, Klaus Winkler,

Rudolf Grimm, and Johannes Hecker Denschlag

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

\\

We have performed high-resolution two-photon dark-state spectroscopy of an

ultracold gas of Rb molecules in the triplet ground state at a magnetic field

of about 1000 G. The vibrational ladder as well as the hyperfine and low-lying

rotational structure is mapped out. Energy shifts in the spectrum are observed

due to singlet-triplet mixing at binding energies as deep as a few hundred GHz

x h. This information together with data from other sources is used to optimize

the potentials of the triplet and singlet states in a coupled-channel model. We

find that the hyperfine structure depends weakly on the vibrational level. This

provides a possible explanation for inaccuracies in recent Feshbach resonance

calculations.

\\ ( http://arxiv.org/abs/1009.2075 , 319kb)

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arXiv:1009.2122

Date: Sat, 11 Sep 2010 00:13:54 GMT (1034kb)

Title: Effect of scattering lengths on the dynamics of a two-component

Bose-Einstein condensate

Authors: G\'abor Csire. D\'aniel Schumayer and Barnab\'as Apagyi

Categories: cond-mat.quant-gas nlin.PS

Comments: 21 pages, 10 figures

\\

We examine the effect of the intra- and interspecies scattering lengths on

the dynamics of a two-component Bose-Einstein condensate, particularly focusing

on the existence and stability of solitonic excitations. For each type of

possible soliton pairs stability ranges are presented in tabulated form. We

also compare the numerically established stability of bright-bright,

bright-dark and dark-dark solitons with our analytical prediction and with that

of Painlev\'e-analysis of the dynamical equation. We demonstrate that tuning

the inter-species scattering length away from the predicted value (keeping the

intra-species coupling fixed) breaks the stability of the soliton pairs.

\\ ( http://arxiv.org/abs/1009.2122 , 1034kb)

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arXiv:1009.2125

Date: Sat, 11 Sep 2010 00:51:21 GMT (995kb)

Title: Dynamical system approach to the BCS-BEC crossover in a gas of ultracold

Fermions

Authors: Analabha Roy

Categories: cond-mat.quant-gas

Comments: 23 pages, 6 figures. Submitted to Physical Review A

\\

The problem of the BCS-BEC crossover in a superfluid ultracold Fermi-gas near

a narrow Feshbach resonance is approached through the time-dependent and

complex Ginzburg-Landau (TDGL) theory. The dynamical system is constructed

using Ginzburg-Landau-Abrikosov-Gor'kov (GLAG) path integral methods with the

single mode approximation for the composite Bosons, and the onset of crossover

is demonstrated for adiabatic variations of the Feshbach detuning along the

fixed points of the dynamical system. Investigations into the rich superfluid

dynamics of this system in the immediate neighborhood of the crossover yields

the onset of multiple interference patterns in the dynamics as the system is

quenched from a pure BEC to the crossover regime. This results in a partial

collapse and revival of the coherent matter wave field of the BEC, whose

temporal profile is reported.

\\ ( http://arxiv.org/abs/1009.2125 , 995kb)

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arXiv:1009.2133

Date: Sat, 11 Sep 2010 03:01:57 GMT (814kb)

Title: Quantum anomalous Hall states in the $p$-orbital honeycomb optical

lattices

Authors: Machi Zhang, Hsiang-hsuan Hung, Chuanwei Zhang, Congjun Wu

Categories: cond-mat.quant-gas

Comments: 13 pages, 11 figures

\\

We study the quantum anomalous Hall states in the $p$-orbital bands of the

honeycomb optical lattices loaded with the single component fermions. By

applying the available experiment technique developed by Gemelke et al. to

rotate each lattice site around its own center, the band structures become

topologically non-trivial. At a certain rotation angular velocity $\Omega$, a

flat band structure appears whose localized eigenstates are constructed as

plaquette current moment states. With imposing the soft harmonic confining

potential, the density profile exhibits a wedding-cake shaped distribution with

insulating plateaus at commensurate fillings. Moreover, the inhomogeneous

confining potential induces dissipationless circulation currents whose

magnitudes and chiralities vary with the distance from the center of the trap.

\\ ( http://arxiv.org/abs/1009.2133 , 814kb)

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arXiv:1009.2283

Date: Mon, 13 Sep 2010 01:37:11 GMT (153kb)

Title: Analytical thermodynamics of a strongly attractive three-component Fermi

gas in one dimension

Authors: Peng He, Xiangguo Yin, Xiwen Guan, Murray T. Batchelor and Yupeng Wang

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

Comments: 14 pages, 7 figures

\\

Ultracold three-component atomic Fermi gases in one dimension are expected to

exhibit rich physics due to the presence of trions and different pairing

states. Quantum phase transitions from the trion state into a paired phase and

a normal Fermi liquid occur at zero temperature. We derive the analytical

thermodynamics of strongly attractive three-component one-dimensional fermions

with SU(3) symmetry via the thermodynamic Bethe ansatz method in unequal Zeeman

splitting fields $H_1$ and $H_2$. We find explicitly that for low temperature

the system acts like either a two-component or a three-component

Tomonaga-Luttinger liquid dependent on the system parameters. The phase

diagrams for the chemical potential and specific heat are presented for

illustrative values of the Zeeman splitting. We also demonstrate that crossover

between different Tomonaga-Luttinger liquid phases evolve singular behaviour in

specific heat and entropy as the temperature tends to zero. Beyond

Tomonaga-Luttinger liquid physics, we obtain the equation of state which

provides a precise description of universal thermodynamics and quantum

criticality in three-component strongly attractive Fermi gases.

\\ ( http://arxiv.org/abs/1009.2283 , 153kb)

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arXiv:1009.2293

Date: Mon, 13 Sep 2010 03:54:00 GMT (344kb)

Title: Superconductivity as the effect of Bose-Einstein condensation and the

relationship of superconductor critical temperature and its electronic

specific heat

Authors: B.V.Vasiliev

Categories: cond-mat.supr-con

\\

It is shown that the temperature dependence of the value of energy gap in

superconductors is characteristic for the order-disorder transition. The

obtained relationship between the critical temperature and the critical

magnetic field of the Bose-Einstein condensate of electrically charged

particles is in accordance with measurement data of superconductors. On this

base the relation of the critical temperature of the superconductor and its

Sommerfeld constant is obtained, i.e. is found the dependence for critical

temperature and the Fermi energy of I-type superconductors. The estimation of

properties of II-type superconductors reveals a somewhat different relation of

critical temperature and Fermi energy. Among the high-temperature

superconducting ceramics there are the both - I and II - types superconductors.

\\ ( http://arxiv.org/abs/1009.2293 , 344kb)

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arXiv:1009.2372

Date: Mon, 13 Sep 2010 12:55:53 GMT (435kb)

Title: Helical spin textures in dipolar Bose-Einstein condensates

Authors: J. A. M. Huhtam\"aki and P. Kuopanportti

Categories: cond-mat.quant-gas

Comments: 7 pages, 6 figures

\\

We numerically study elongated helical spin textures in ferromagnetic spin-1

Bose-Einstein condensates subject to dipolar interparticle forces. Stationary

states of the zero-temperature mean-field Gross-Pitaevskii equation are solved

and analyzed for various values of the helical wave vector and dipolar coupling

strength. We find two helical spin textures which differ by the nature of their

topological defects. The spin structure hosting a pair of Mermin-Ho vortices

with opposite mass flows and aligned spin currents is stabilized for a nonzero

value of the helical wave vector.

\\ ( http://arxiv.org/abs/1009.2372 , 435kb)

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arXiv:1009.2374

Date: Mon, 13 Sep 2010 12:56:13 GMT (3321kb,D)

Title: Nonlinear atom interferometer surpasses classical precision limit

Authors: Christian Gross, Tilman Zibold, Eike Nicklas, Jerome Esteve and Markus

K. Oberthaler

Categories: cond-mat.quant-gas

Journal-ref: Nature 464, 1165 (2010)

DOI: 10.1038/nature08919

\\

Interference is fundamental to wave dynamics and quantum mechanics. The

quantum wave properties of particles are exploited in metrology using atom

interferometers, allowing for high-precision inertia measurements [1, 2].

Furthermore, the state-of-the-art time standard is based on an interferometric

technique known as Ramsey spectroscopy. However, the precision of an

interferometer is limited by classical statistics owing to the finite number of

atoms used to deduce the quantity of interest [3]. Here we show experimentally

that the classical precision limit can be surpassed using nonlinear atom

interferometry with a Bose-Einstein condensate. Controlled interactions between

the atoms lead to non-classical entangled states within the interferometer;

this represents an alternative approach to the use of non-classical input

states [4-8]. Extending quantum interferometry [9] to the regime of large atom

number, we find that phase sensitivity is enhanced by 15 per cent relative to

that in an ideal classical measurement. Our nonlinear atomic beam splitter

follows the "one-axis-twisting" scheme [10] and implements interaction control

using a narrow Feshbach resonance. We perform noise tomography of the quantum

state within the interferometer and detect coherent spin squeezing with a

squeezing factor of -8.2dB [11-15]. The results provide information on the

many-particle quantum state, and imply the entanglement of 170 atoms [16].

\\ ( http://arxiv.org/abs/1009.2374 , 3321kb)

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arXiv:1009.2404

Date: Mon, 13 Sep 2010 14:24:32 GMT (63kb,D)

Title: Quantum mechanics needs no consciousness (and the other way around)

Authors: Shan Yu and Danko Nikoli\'c

Categories: physics.gen-ph physics.pop-ph

Comments: 7 pages, 1 figure

\\

It has been suggested that consciousness plays an important role in quantum

mechanics as it is necessary for the collapse of wave function during the

measurement. Furthermore, this idea has spawned a symmetrical proposal: a

possibility that quantum mechanics explains the emergence of consciousness in

the brain. Here we formulated several predictions that follow from this

hypothetical relationship and that can be empirically tested. Some of the

experimental results that are already available suggest falsification of the

first hypothesis. Thus, the suggested link between human consciousness and

collapse of wave function does not seem viable. We discuss the constraints

implied by the existing evidence on the role that the human observer may play

for quantum mechanics and the role that quantum mechanics may play in the

observer's consciousness.

\\ ( http://arxiv.org/abs/1009.2404 , 63kb)

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arXiv:1009.2415

Date: Mon, 13 Sep 2010 15:08:07 GMT (1117kb,D)

Title: Controlling and Detecting Spin Correlations of Ultracold Atoms in

Optical lattices

Authors: Stefan Trotzky, Yu-Ao Chen, Ute Schnorrberger, Patrick Cheinet and

Immanuel Bloch

Categories: cond-mat.quant-gas

Comments: 6 pages, 4 figures

\\

We report on the controlled creation of a valence bond state of delocalized

effective-spin singlet and triplet dimers by means of a bichromatic optical

superlattice. We demonstrate a coherent coupling between the singlet and

triplet states and show how the superlattice can be employed to measure the

singlet-fraction employing a spin blockade effect. Our method provides a

reliable way to detect and control nearest-neighbor spin correlations in

many-body systems of ultracold atoms. Being able to measure these correlations

is an important ingredient to study quantum magnetism in optical lattices. We

furthermore employ a SWAP operation between atoms being part of different

triplets, thus effectively increasing their bond-length. Such SWAP operation

provides an important step towards the massively parallel creation of a

multi-particle entangled state in the lattice.

\\ ( http://arxiv.org/abs/1009.2415 , 1117kb)

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arXiv:1009.2441

Date: Mon, 13 Sep 2010 16:24:52 GMT (754kb,D)

Title: Enhancement of laser cooling by the use of magnetic gradients

Authors: Andreas Albrecht, Alex Retzker, Christof Wunderlich, Martin B. Plenio

Categories: quant-ph

Comments: 14 pages, 8 figures

\\

We present a laser cooling scheme for trapped ions and atoms using a

combination of laser couplings and a magnetic gradient field. In a

Schrieffer-Wolff transformed picture, this setup cancels the carrier and blue

sideband terms completely resulting in an improved cooling behaviour compared

to standard cooling schemes (e.g. sideband cooling) and allowing cooling to the

vibrational ground state. A condition for optimal cooling rates is presented

and the cooling behaviour for different Lamb-Dicke parameters and spontaneous

decay rates is discussed. Cooling rates of one order of magnitude less than the

trapping frequency are achieved using the new cooling method. Furthermore the

scheme turns out to be robust under deviations from the optimal parameters and

moreover provides good cooling rates also in the multi particle case.

\\ ( http://arxiv.org/abs/1009.2441 , 754kb)

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arXiv:1009.2475

Date: Mon, 13 Sep 2010 18:56:19 GMT (123kb)

Title: Observation of the pre-superfluid regime in a two-dimensional Bose gas

Authors: S. Tung, G. Lamporesi, D. Lobser, L. Xia, and E. A. Cornell

Categories: cond-mat.quant-gas

Comments: 4 pages, 3 figures. Resubmission version of the letter submitted to

PRL on 7/12/10

\\

In complementary images of coordinate-space and momentum-space density in a

trapped 2D Bose gas, we observe the emergence of pre-superfluid behavior. As

phase-space density $\rho$ increases toward degenerate values, we observe a

gradual divergence of the compressibility $\kappa$ from the value predicted by

a bare-atom model, $\kappa_{ba}$. $\kappa/\kappa_{ba}$ grows to 1.7 before

$\rho$ reaches the value for which we observe the sudden emergence of a spike

at $p=0$ in momentum space. Momentum-space images are acquired by means of a 2D

focusing technique. Our data represent the first observation of non-meanfield

physics in the pre-superfluid but degenerate 2D Bose gas.

\\ ( http://arxiv.org/abs/1009.2475 , 123kb)

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arXiv:1009.2485 (*cross-listing*)

Date: Mon, 13 Sep 2010 19:31:12 GMT (566kb)

Title: Gravitational Redshift, Equivalence Principle, and Matter Waves

Authors: Michael A. Hohensee, Brian Estey, Francisco Monsalve, Geena Kim,

Pei-Chen Kuan, Shau-Yu Lan, Nan Yu, Achim Peters, Steven Chu, and Holger

Mueller

Categories: gr-qc physics.atom-ph quant-ph

Comments: Work in progress. 11 pages

\\

We review matter wave and clock comparison tests of the gravitational

redshift. To elucidate their relationship to tests of the universality of free

fall (UFF), we define scenarios wherein redshift violations are coupled to

violations of UFF ("type II"), or independent of UFF violations ("type III"),

respectively. Clock comparisons and atom interferometers are sensitive to

similar effects in type II and precisely the same effects in type III

scenarios, although type III violations remain poorly constrained. Finally, we

describe the "Geodesic Explorer," a conceptual spaceborne atom interferometer

that will test the gravitational redshift with an accuracy 5 orders of

magnitude better than current terrestrial redshift experiments for type II

scenarios and 12 orders of magnitude better for type III.

\\ ( http://arxiv.org/abs/1009.2485 , 566kb)

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arXiv:1009.2493 (*cross-listing*)

Date: Mon, 13 Sep 2010 19:55:21 GMT (121kb,D)

Title: Absence of thermalization in non-integrable systems

Authors: Christian Gogolin, Markus P. Mueller, and Jens Eisert

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

Comments: 5 pages, 2 figures

\\

We present results establishing a link between unitary relaxation dynamics

after a quench in closed many-body systems in non-equilibrium and the

entanglement in the energy eigenbasis. We find that even if reduced states

equilibrate, and appear perfectly relaxed, they can still have memory on the

initial conditions even in models that are far from integrable, thereby giving

rise to "equilibration without thermalization". We show that in such situations

the equilibrium states are, however, still described by a Jaynes maximum

entropy or generalized Gibbs ensemble and, moreover, that this is always the

case if equilibration happens, regardless of whether a model is integrable or

not. In addition, we discuss individual aspects of thermalization processes

separately, comment on the role of Anderson localization, and collect and

compare different notions of integrability.

\\ ( http://arxiv.org/abs/1009.2493 , 121kb)

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arXiv:1009.2513

Date: Mon, 13 Sep 2010 20:28:07 GMT (790kb)

Title: Cold N+NH Collisions in a Magnetic Trap

Authors: Matthew T. Hummon and Timur V. Tscherbul and Jacek K{\l}os and Hsin-I

Lu and Edem Tsikata and Wesley C. Campbell and Alexander Dalgarno and John M.

Doyle

Categories: physics.atom-ph

\\

We present an experimental and theoretical study of atom-molecule collisions

in a mixture of cold, trapped atomic nitrogen and NH molecules at a temperature

of $\sim 600$~mK. We measure a small N+NH trap loss rate coefficient of

$k^{(\mathrm{N+NH})}_\mathrm{loss} = 8(4) \times 10^{-13}$~cm$^{3}$s$^{-1}$.

Accurate quantum scattering calculations based on {\it ab initio} interaction

potentials are in agreement with experiment and indicate the magnetic dipole

interaction to be the dominant loss mechanism. Our theory further indicates the

ratio of N+NH elastic to inelastic collisions remains large ($>100$) into the

mK regime.

\\ ( http://arxiv.org/abs/1009.2513 , 790kb)

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arXiv:1009.2544

Date: Tue, 14 Sep 2010 00:27:00 GMT (915kb)

Title: Loading characteristics of a microscopic optical dipole trap

Authors: P. Kulatunga, T. Blum, and D. Olek

Categories: physics.atom-ph

Comments: 8 pages, 9 Figures

\\

We report on an investigation of loading characteristics of deep microscopic

dipole traps. The dipole trap is loaded from a low density magneto optical trap

(MOT) containing $\approx 5\times 10^{6}$ atoms. We determine the loading

parameters that maximize the trapped atom number for a trap of waist 5 {\mu}m

with trap depths ranging from 3.5 mK to 10 mK. We determine the optimal trap

loading conditions and the loading rates, loss coefficients and temperature of

the trapped atoms under these conditions. We show that it is possible to load a

few hundred to thousand atoms in dipole traps of depth 3.5 mK to 8.5 mK under

the optimal loading conditions.

\\ ( http://arxiv.org/abs/1009.2544 , 915kb)

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arXiv:1009.2603

Date: Tue, 14 Sep 2010 09:40:40 GMT (198kb)

Title: An Experimental Proposal to Test Dynamic Quantum Non-locality with

Single-Atom Interferometry

Authors: Shi-Liang Zhu, Zheng-Yuan Xue, Dan-Wei Zhang, and Lu-Ming Duan

Categories: quant-ph

Comments: 4 pages

\\

Quantum non-locality based on the well-known Bell inequality is of kinematic

nature. A different type of quantum non-locality, the non-locality of the

quantum equation of motion, is recently put forward with connection to the

Aharonov-Bohm effect [Nature Phys. 6, 151 (2010)]. Evolution of the

displacement operator provides an example to manifest such dynamic quantum

non-locality. We propose an experiment using single-atom interferometry to test

such dynamic quantum non-locality. We show how to measure evolution of the

displacement operator with clod atoms in a spin-dependent optical lattice

potential and discuss signature to identify dynamic quantum non-locality under

a realistic experimental setting.

\\ ( http://arxiv.org/abs/1009.2603 , 198kb)

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arXiv:1009.2606

Date: Tue, 14 Sep 2010 10:00:13 GMT (63kb)

Title: Magnetic cooling of ultracold two-component fermions using high-spin

Fermi gases

Authors: M. Colom\'e-Tatch\'e, C. Klempt, L. Santos, and T. Vekua

Categories: cond-mat.quant-gas

Comments: 4 pages, 3 eps figures

\\

We propose a cooling scheme for two-component fermions in optical lattices

that employs the internal structure of high-spin Fermi gases. Adiabatically

changing the quadratic Zeeman coupling from a uniform distribution to a space

dependent one allows for the creation of an inner spin-1/2 core surrounded by

spin-S wings. We show that, due to frustration, spin-S regions act via

spin-changing collisions as effective entropy absorbers for the spin-1/2 core

with increasing efficiency at lower temperatures and higher dimensions. We

illustrate our scheme explicitly on 1D spin-3/2 fermions, showing that the

entropy of the spin-1/2 Mott region can be significantly reduced. Our findings

suggest that the proposed method can be highly efficient, opening a feasible

path for accessing anti-ferromagnetic order under current experimental

conditions.

\\ ( http://arxiv.org/abs/1009.2606 , 63kb)

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arXiv:1009.2623 (*cross-listing*)

Date: Tue, 14 Sep 2010 10:56:01 GMT (478kb)

Title: Dephasing effects on stimulated Raman adiabatic passage in tripod

configurations

Authors: C. Lazarou and N. V. Vitanov

Categories: quant-ph physics.atom-ph

Comments: 13 pages; 9 figures; Accepted for publication Physical Review A

\\

We present an analytic description of the effects of dephasing processes on

stimulated Raman adiabatic passage in a tripod quantum system. To this end, we

develop an effective two-level model. Our analysis makes use of the adiabatic

approximation in the weak dephasing regime. An effective master equation for a

two-level system formed by two dark states is derived, where analytic solutions

are obtained by utilizing the Demkov-Kunike model. From these, it is found that

the fidelity for the final coherent superposition state decreases exponentially

for increasing dephasing rates. Depending on the pulse ordering and for

adiabatic evolution the pulse delay can have an inverse effect.

\\ ( http://arxiv.org/abs/1009.2623 , 478kb)

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arXiv:1009.2648

Date: Tue, 14 Sep 2010 13:12:04 GMT (9kb)

Title: Isothermal sweep theorems for ultra-cold quantum gases in a canonical

ensemble

Authors: M. Iskin

Categories: cond-mat.quant-gas

Comments: 5 pages

\\

After deriving the Hellmann-Feynman theorem (HFT) that is suitable for mixed

states in a canonical ensemble, we use this theorem to obtain the isothermal

sweep theorems for the free, average and trapping energies, and for the

entropy, specific heat and pressure of strongly-correlated ultra-cold quantum

gases. We also use the HFT to obtain the Virial theorem in a canonical

ensemble, and discuss its implications for quantum gases.

\\ ( http://arxiv.org/abs/1009.2648 , 9kb)

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arXiv:1009.2655

Date: Tue, 14 Sep 2010 13:24:17 GMT (232kb)

Title: Einstein-Podolsky-Rosen Correlations of Ultracold Atomic Gases

Authors: Nir Bar-Gill, Christian Gross, Gershon Kurizki, Igor Mazets, Markus

Oberthaler

Categories: quant-ph

\\

Einstein, Podolsky & Rosen (EPR) pointed out that correlations induced

between quantum objects will persist after these objects have ceased to

interact. Consequently, their joint continuous variables (CV), e.g., the

difference of their positions and the sum of their momenta, may be specified,

regardless of their distance, with arbitrary precision. EPR correlations give

rise to two fundamental notions: {\em nonlocal ``steering''} of the quantum

state of one object by measuring the other, and inseparability ({\em

entanglement}) of their quantum states. EPR entanglement is a resource of

quantum information (QI) and CV teleportation of light and matter waves. It has

lately been demonstrated for {\em collective} CV of distant thermal-gas clouds,

correlated by interaction with a common field. Here we demonstrate that

collective CV of two species of trapped ultracold bosonic gases can be

EPR-correlated (entangled) via {\em inherent} interactions between the species.

This paves the way to further QI applications of such systems, which are atomic

analogs of coupled superconducting Josephson Junctions (JJ). A precursor of

this study has been the observation of quantum correlations (squeezing) in a

single bosonic JJ.

\\ ( http://arxiv.org/abs/1009.2655 , 232kb)

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arXiv:1009.2700

Date: Tue, 14 Sep 2010 15:43:29 GMT (676kb)

Title: Resonant enhancement of the FFLO-state in 3D by a one-dimensional

optical potential

Authors: Jeroen P. A. Devreese, Sergei N. Klimin and Jacques Tempere

Categories: cond-mat.quant-gas

Comments: 19 pages 6 figures

\\

We describe an imbalanced superfluid Fermi gas in three dimensions within the

path-integral framework. To allow for the formation of the

Fulde-Ferell-Larkin-Ovchinnikov-state (FFLO-state), a suitable form of the

saddle-point is chosen, in which the pairs have a finite centre-of-mass

momentum. To test the correctness of this path-integral description, the

zero-temperature phase diagram for an imbalanced Fermi gas in three dimensions

is calculated, and compared to recent theoretical results. Subsequently, we

investigate two models that describe the effect of imposing a one-dimensional

optical potential on the 3D imbalanced Fermi gas. We show that this 1D optical

potential can greatly enlarge the stability region of the FFLO-state, relative

to the case of the 3D Fermi gas without 1D periodic modulation. Furthermore it

is show that there exists a direct connection between the centre-of-mass

momentum of the FFLO-pairs and the wavevector of the optical potential. We

propose that this concept can be used experimentally to resonantly enhance the

stability region of the FFLO-state.

\\ ( http://arxiv.org/abs/1009.2700 , 676kb)

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arXiv:1009.2702

Date: Tue, 14 Sep 2010 15:47:00 GMT (2609kb)

Title: An Atomic Gravitational Wave Interferometric Sensor in Low Earth Orbit

(AGIS-LEO)

Authors: Jason M. Hogan, David M. S. Johnson, Susannah Dickerson, Tim Kovachy,

Alex Sugarbaker, Sheng-wey Chiow, Peter W. Graham, Mark A. Kasevich, Babak

Saif, Surjeet Rajendran, Philippe Bouyer, Bernard D. Seery, Lee Feinberg,

Ritva Keski-Kuha

Categories: physics.atom-ph gr-qc

Comments: 37 pages, 21 figures

\\

We propose an atom interferometer gravitational wave detector in low Earth

orbit (AGIS-LEO). Gravitational waves can be observed by comparing a pair of

atom interferometers separated over a ~30 km baseline. In the proposed

configuration, one or three of these interferometer pairs are simultaneously

operated through the use of two or three satellites in formation flight. The

three satellite configuration allows for the increased suppression of multiple

noise sources and for the detection of stochastic gravitational wave signals.

The mission will offer a strain sensitivity of < 10^(-18) / Hz^(1/2) in the 50

mHz - 10 Hz frequency range, providing access to a rich scientific region with

substantial discovery potential. This band is not currently addressed with the

LIGO or LISA instruments. We analyze systematic backgrounds that are relevant

to the mission and discuss how they can be mitigated at the required levels.

Some of these effects do not appear to have been considered previously in the

context of atom interferometry, and we therefore expect that our analysis will

be broadly relevant to atom interferometric precision measurements. Finally, we

present a brief conceptual overview of shorter-baseline (< 100 m) atom

interferometer configurations that could be deployed as proof-of-principle

instruments on the International Space Station (AGIS-ISS) or an independent

satellite.

\\ ( http://arxiv.org/abs/1009.2702 , 2609kb)

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\\

arXiv:1009.2713

Date: Tue, 14 Sep 2010 16:36:51 GMT (471kb)

Title: An elementary exposition of the Efimov Effect

Authors: Rajat K. Bhaduri, Arindam Chatterjee and Brandon P. van Zyl

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

Comments: 4 figures. Accepted for publication in American Journal of Physics

\\

Two particles that are just shy of binding may develop an infinite number of

shallow bound states when a third particle is added. This counter intuitive

quantum mechanical result was first predicted by V.~Efimov for identical bosons

interacting with a short-range pair-wise potential. The so-called Efimov effect

persists even for non-identical particles, provided at least two of the three

bonds are almost bound. The Efimov effect has recently been verified

experimentally using ultra-cold atoms. In this article, we explain the origin

of this effect using only elementary quantum mechanics, and summarize the

experimental evidence for the Efimov effect. A new, simple derivation for the

number of Efimov states is given in the Appendix.

\\ ( http://arxiv.org/abs/1009.2713 , 471kb)

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\\

arXiv:1009.2748 (*cross-listing*)

Date: Tue, 14 Sep 2010 19:56:08 GMT (1285kb)

Title: Fast conservative and entropic numerical methods for the Boson Boltzmann

equation

Authors: P.A. Markowitch, L. Pareschi

Categories: math.NA cond-mat.mes-hall cond-mat.quant-gas physics.comp-ph

MSC-class: 82C10, 76P05, 65D32, 65T50

Journal-ref: Numerische Mathematik, 99 (2005), 509-532

\\

In this paper we derive accurate numerical methods for the quantum Boltzmann

equation for a gas of interacting bosons. The schemes preserve the main

physical features of the continuous problem, namely conservation of mass and

energy, the entropy inequality and generalized Bose-Einstein distributions as

steady states. These properties are essential in order to develop schemes that

are able to capture the energy concentration behavior of bosons. In addition we

develop fast algorithms for the numerical evaluation of the resulting

quadrature formulas which allow the final schemes to be computed only in O(N^2

log N) operations instead of O(N^3).

\\ ( http://arxiv.org/abs/1009.2748 , 1285kb)

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\\

arXiv:1009.2759

Date: Tue, 14 Sep 2010 20:05:01 GMT (1421kb)

Title: Thermodynamics of the 3D Hubbard model on approach to the Neel

transition

Authors: S. Fuchs, E. Gull, L. Pollet, E. Burovski, E. Kozik, T. Pruschke, M.

Troyer

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

Comments: 4 pages, 6 figures

\\

We study the thermodynamic properties of the 3D Hubbard model for

temperatures down to the Neel temperature using cluster dynamical mean-field

theory. In particular we calculate the energy, entropy, density, double

occupancy and nearest-neighbor spin correlations as a function of chemical

potential, temperature and repulsion strength. To make contact with cold-gas

experiments, we also compute properties of the system subject to an external

trap in the local density approximation. We find that an entropy per particle

$S/N \approx 0.65(6)$ at $U/t=8$ is sufficient to achieve a Neel state in the

center of the trap, substantially higher than the entropy required in a

homogeneous system. Precursors to antiferromagnetism can clearly be observed in

nearest-neighbor spin correlators.

\\ ( http://arxiv.org/abs/1009.2759 , 1421kb)

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\\

arXiv:1009.2761

Date: Tue, 14 Sep 2010 20:11:49 GMT (989kb,D)

Title: Thermodynamics of the three-dimensional Hubbard model: Implications for

cooling cold atomic gases in optical lattices

Authors: Lorenzo De Leo, Jean-Sebastien Bernier, Corinna Kollath, Antoine

Georges, Vito W. Scarola

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

Comments: 17 pages, 27 figures

\\

We present a comprehensive study of the thermodynamic properties of the

three-dimensional fermionic Hubbard model, with application to cold fermionic

atoms subject to an optical lattice and a trapping potential. Our study is

focused on the temperature range of current experimental interest. We employ

two theoretical methods - dynamical mean-field theory and high-temperature

series - and perform comparative benchmarks to delimitate their respective

range of validity. Special attention is devoted to understand the implications

that thermodynamic properties of this system have on cooling. Considering the

distribution function of local occupancies in the inhomogeneous lattice, we

show that, under adiabatic evolution, the variation of any observable (e.g.,

temperature) can be conveniently disentangled into two distinct contributions.

The first contribution is due to the redistribution of atoms in the trap during

the evolution, while the second one comes from the intrinsic change of the

observable. Finally, we provide a simplified picture of the cooling procedure

recently proposed in J.-S. Bernier et al., Phys. Rev. A 79, 061601 (2009) by

applying this method to an idealized model.

\\ ( http://arxiv.org/abs/1009.2761 , 989kb)

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\\

arXiv:1009.2904 (*cross-listing*)

Date: Wed, 15 Sep 2010 12:11:16 GMT (1427kb)

Title: Superfluid Motion of Light

Authors: Patricio Leboeuf and Simon Moulieras

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

Comments: 4 pages, 3 figures

\\

Superfluidity, the ability of a fluid to move without dissipation, is one of

the most spectacular manifestations of the quantum nature of matter. We explore

here the possibility of superfluid motion of light. Controlling the speed of a

light packet with respect to a defect, we demonstrate the presence of

superfluidity and, above a critical velocity, its breakdown through the onset

of a dissipative phase. We describe a possible experimental realization based

on the transverse motion through an array of waveguides. These results open new

perspectives in transport optimization.

\\ ( http://arxiv.org/abs/1009.2904 , 1427kb)

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\\

arXiv:1009.2916 (*cross-listing*)

Date: Wed, 15 Sep 2010 13:18:57 GMT (255kb)

Title: Cavity-enhanced atom detection with cooperative noise reduction

Authors: J. Goldwin, M. Trupke, J. Kenner, A. Ratnapala, and E. A. Hinds

Categories: quant-ph physics.atom-ph

Comments: 4 pages, 3 figures, 1 table; submitted for publication

\\

An optical microcavity with small mode radius is used to measure the local

density of a cold atom cloud. Atom densities below 1 per cavity mode volume are

measured with signals near the photon shot-noise limit. Atom detection is fast

and efficient, reaching fidelities in excess of 97% after 10 us and 99.9% after

30 us. Notably, the fluctuations of the detected photon counts are smaller than

expected for Poissonian distributions of atoms probed with Poissonian light

fields. This noise suppression is attributed to multi-atom effects on the

collective atomic dipole interacting with the cavity field. Our measurements

confirm a decade-old theory of atomic beams in cavity quantum electrodynamics.

\\ ( http://arxiv.org/abs/1009.2916 , 255kb)

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\\

arXiv:1009.2956

Date: Wed, 15 Sep 2010 15:41:00 GMT (832kb,D)

Title: Measuring entanglement in condensed matter systems

Authors: M. Cramer, M.B. Plenio, and H. Wunderlich

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

Comments: 6 pages, 2 figures

\\

We show how entanglement may be quantified in spin and cold atom many-body

systems using standard experimental techniques only. The scheme requires no

assumptions on the state in the laboratory and a lower bound to the

entanglement can be read off directly from the scattering cross section of

Neutrons deflected from solid state samples or the time-of-flight distribution

of cold atoms in optical lattices, respectively. This removes a major obstacle

which so far has prevented the direct and quantitative experimental study of

genuine quantum correlations in many-body systems: The need for a full

characterization of the state to quantify the entanglement contained in it.

Instead, the scheme presented here relies solely on global measurements that

are routinely performed and is versatile enough to accommodate systems and

measurements different from the ones we exemplify in this work.

\\ ( http://arxiv.org/abs/1009.2956 , 832kb)

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\\

arXiv:1009.2962

Date: Wed, 15 Sep 2010 16:15:59 GMT (416kb,D)

Title: Spectroscopy of a narrow-line laser cooling transition in atomic

dysprosium

Authors: Mingwu Lu and Seo Ho Youn and Benjamin L. Lev

Categories: physics.atom-ph quant-ph

Comments: 6+ pages, 5 figures, 5 tables

\\

The laser cooling and trapping of ultracold neutral dysprosium has been

recently demonstrated using the broad, open 421-nm cycling transition.

Narrow-line magneto-optical trapping of Dy on longer wavelength transitions

would enable the preparation of ultracold Dy samples suitable for loading

optical dipole traps and subsequent evaporative cooling. We have identified the

closed 741-nm cycling transition as a candidate for the narrow-line cooling of

Dy. We present experimental data on the isotope shifts, the hyperfine constants

A and B, and the decay rate of the 741-nm transition. In addition, we report a

measurement of the 421-nm transition's linewidth, which agrees with previous

measurements. We summarize the laser cooling characteristics of these

transitions as well as other narrow cycling transitions that may prove useful

for cooling Dy.

\\ ( http://arxiv.org/abs/1009.2962 , 416kb)

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\\

arXiv:1009.3118

Date: Thu, 16 Sep 2010 08:44:20 GMT (74kb)

Title: Optical cooling and trapping of tripod-type atoms with rectified

radiation forces

Authors: I. V. Krasnov

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

Comments: 15 pages, 2 figures

\\

A new scheme of three-dimensional (3D) all-optical (nonmagnetic) cooling and

trapping of resonant atoms, based on using of so-called rectified radiation

forces in non-monochromatic light fields is presented. It can be applied to the

atoms with a tripod-type configuration of levels: atoms (ions) with the quantum

transition F=1 \to F=0. The scheme proposed provides a long-term trapping of

such atoms in deep light-induced potential wells. Moreover, the atom

temperature can continuously be changed by varying field parameters in quite a

large range (from super-Doppler to sub-Doppler values) without violating the

localization stability.

\\ ( http://arxiv.org/abs/1009.3118 , 74kb)

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\\

arXiv:1009.3119

Date: Thu, 16 Sep 2010 08:44:32 GMT (4064kb,D)

Title: Tunable Wigner states with dipolar atoms and molecules

Authors: J. C. Cremon, G. M. Bruun, and S. M. Reimann

Categories: cond-mat.quant-gas

Comments: 4 pages, 6 figures

\\

We study the few-body physics of trapped atoms or molecules with electric or

magnetic dipole moments aligned by an external field. Using exact numerical

diagonalization appropriate for the strongly correlated regime, as well as a

classical analysis, we show how Wigner localization emerges with increasing

coupling strength. The Wigner states exhibit non-trivial geometries due to the

anisotropy of the interaction. This leads to transitions between different

Wigner states as the tilt angle of the dipoles with the confining plane is

changed. Intriguingly, while the individual Wigner states are well described by

a classical analysis, the transitions between different Wigner states are

strongly affected by quantum statistics. This can be understood by considering

the interplay between quantum-mechanical and spatial symmetry properties.

Finally, we demonstrate that our results are relevant to experimentally

realistic systems.

\\ ( http://arxiv.org/abs/1009.3119 , 4064kb)

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\\

arXiv:1009.3120

Date: Thu, 16 Sep 2010 09:07:23 GMT (1646kb,D)

Title: Superflow of resonantly driven polaritons against a defect

Authors: E. Cancellieri, F. M. Marchetti, M. H. Szymanska, C. Tejedor

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

Comments: 8 pages, 5 figures

\\

In the linear response approximation, coherently driven microcavity

polaritons in the pump-only configuration are expected to satisfy the Landau

criterion for superfluidity at either strong enough pump powers or small flow

velocities. Here, we solve non-perturbatively the time dependent

Gross-Pitaevskii equation describing the resonantly-driven polariton system. We

show that, even in the limit of asymptotically large densities, where in linear

response approximation the system satisfies the Landau criterion, the fluid

always experiences a residual drag force when flowing through the defect. We

illustrate the result in terms of the polariton lifetime being finite, finding

that the equilibrium limit of zero drag can only be recovered in the case of

perfect microcavities. In general, both the drag force exerted by the defect on

the fluid, as well as the height of Cerenkov radiation, and the percentage of

particles scattered by the defect, show a smooth crossover rather than a sharp

threshold-like behaviour typical of superfluids which obey the Landau

criterion.

\\ ( http://arxiv.org/abs/1009.3120 , 1646kb)

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\\

arXiv:1009.3140

Date: Thu, 16 Sep 2010 10:46:26 GMT (58kb)

Title: Engineering two-mode squeezed states of cold atomic clouds with a

superconducting stripline resonator

Authors: Pengbo Li and Fuli Li

Categories: quant-ph

Comments: To appear in Optics Communications,8pages,2figs

\\

A scheme is proposed for engineering two-mode squeezed states of two

separated cold atomic clouds positioned near the surface of a superconducting

stripline resonator. Based on the coherent magnetic coupling between the atomic

spins and a stripline resonator mode, the desired two-mode squeezed state can

be produced via precisely control on the dynamics of the system. This scheme

may be used to realize scalable on-chip quantum networks with cold atoms

coupling to stripline resonators.

\\ ( http://arxiv.org/abs/1009.3140 , 58kb)

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\\

arXiv:1009.3170

Date: Thu, 16 Sep 2010 13:21:07 GMT (1212kb)

Title: Norm preserving stochastic field equation for an ideal Bose gas in a

trap: numerical implementation and applications

Authors: S. Heller and W. T. Strunz

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

Comments: 11 pages, 6 figures

\\

Stochastic field equations represent a powerful tool to describe the thermal

state of a trapped Bose gas. Often, such approaches are confronted with the old

problem of an ultraviolet catastrophe, which demands a cutoff at high energies.

In [1] we introduce a quantum stochastic field equation, avoiding the cutoff

problem through a fully quantum approach based on the Glauber-Sudarshan

P-function. For a close link to actual experimental setups the theory is

formulated for a fixed particle number and thus based on the canonical

ensemble. In this work the derivation and the non-trivial numerical

implementation of the equation is explained in detail. We present applications

for finite Bose gases trapped in a variety of potentials and show results for

ground state occupation numbers and their equilibrium fluctuations. Moreover,

we investigate spatial coherence properties by studying correlation functions

of various orders.

[1] S. Heller and W. T. Strunz, J. Phys. B 42, 081001 (2009).

\\ ( http://arxiv.org/abs/1009.3170 , 1212kb)

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\\

arXiv:1009.3257

Date: Thu, 16 Sep 2010 19:34:47 GMT (343kb)

Title: Stable Fulde-Ferrell-Larkin-Ovchinnikov pairing states in 2D and 3D

optical lattices

Authors: Zi Cai, Yupeng Wang, and Congjun Wu

Categories: cond-mat.quant-gas

\\

We present the study of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing

states in the $p$-orbital bands in both two and three-dimensional optical

lattices. Due to the quasi one-dimensional band structure which arises from the

unidirectional hopping of the orthogonal $p$-orbitals, the pairing phase space

is not affected by spin imbalance. Furthermore, interactions build up high

dimensional phase coherence which stabilizes the FFLO states in 2D and 3D

optical lattices in a large parameter regime in the phase diagram. These FFLO

phases are stable with imposing the inhomogeneous trapping potential. Their

entropy are comparable to the normal states at finite temperatures.

\\ ( http://arxiv.org/abs/1009.3257 , 343kb)

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The replacements:

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\\

arXiv:0909.5090

replaced with revised version Fri, 10 Sep 2010 08:07:50 GMT (1893kb)

Title: Bose-Einstein condensation in dark power-law laser traps

Authors: Amine Jaouadi (LSAMA, ISMO), Naceur Gaaloul (IQ), Bruno Viaris De

Lesegno (LAC), Mourad Telmini (LSAMA), Laurence Pruvost (LAC), Eric Charron

(ISMO)

Categories: quant-ph

Journal-ref: Physical Review A: Atomic, Molecular and Optical Physics 82, 2

(2010) 023613

DOI: 10.1103/PhysRevA.82.023613

\\ ( http://arxiv.org/abs/0909.5090 , 1893kb)

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\\

arXiv:0909.1314

replaced with revised version Sat, 11 Sep 2010 16:27:49 GMT (59kb,D)

Title: Effective Potential for Ultracold Atoms at the Zero-Crossing of a

Feshbach Resonance

Authors: N. T. Zinner

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

Comments: 5 pages, 1 figure, revised version

\\ ( http://arxiv.org/abs/0909.1314 , 59kb)

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\\

arXiv:1009.1511

replaced with revised version Sun, 12 Sep 2010 18:43:08 GMT (89kb)

Title: The second critical point for the Perfect Bose gas in

quasi-one-dimensional traps

Authors: Mathieu Beau (CPT), Valentin A. Zagrebnov (CPT)

Categories: cond-mat.quant-gas

\\ ( http://arxiv.org/abs/1009.1511 , 89kb)

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\\

arXiv:1009.1696

replaced with revised version Mon, 13 Sep 2010 05:29:41 GMT (481kb)

Title: Equilibrium Properties of Trapped Dipolar Gases at Finite Temperatures

Authors: Yuki Endo, Takahiko Miyakawa and Tetsuro Nikuni

Categories: cond-mat.other

Comments: 14 pages, 14 figures

\\ ( http://arxiv.org/abs/1009.1696 , 481kb)

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\\

arXiv:1009.0975

replaced with revised version Mon, 13 Sep 2010 12:07:27 GMT (641kb)

Title: Breathing Oscillations in Bose - Fermi Mixing Gases with Yb atoms in the

Largely Prolate Deformed Traps

Authors: Tomoyuki Maruyama, Hiroyuki Yabu

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

Comments: 27 pages, 12 figures

\\ ( http://arxiv.org/abs/1009.0975 , 641kb)

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\\

arXiv:0904.4837

replaced with revised version Mon, 13 Sep 2010 15:25:35 GMT (1036kb,D)

Title: Coherent manipulation of Bose-Einstein condensates with state-dependent

microwave potentials on an atom chip

Authors: Pascal Boehi, Max F. Riedel, Johannes Hoffrogge, Jakob Reichel,

Theodor W. Haensch, Philipp Treutlein

Categories: quant-ph

Comments: 9 pages, 6 figures

Journal-ref: Nature Physics 5, 592 - 597 (2009)

DOI: 10.1038/nphys1329

\\ ( http://arxiv.org/abs/0904.4837 , 1036kb)

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\\

arXiv:1006.3258

replaced with revised version Mon, 13 Sep 2010 16:24:26 GMT (336kb)

Title: Ultracold atoms in a cavity mediated double-well system

Authors: Jonas Larson and Jani-Petri Martikainen

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

Comments: 12 pages, 10 figures

Journal-ref: Phys. Rev. A 82, 033606 (2010)

DOI: 10.1103/PhysRevA.82.033606

\\ ( http://arxiv.org/abs/1006.3258 , 336kb)

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\\

arXiv:0911.0934

replaced with revised version Tue, 14 Sep 2010 14:58:33 GMT (875kb,D)

Title: Mott-Hubbard and Anderson metal-insulator transitions in correlated

lattice fermions with binary disorder

Authors: Denis Semmler, Krzysztof Byczuk, Walter Hofstetter

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

Comments: 10 pages, 11 figures, published version

Journal-ref: Phys. Rev. B 81, 115111 (2010)

DOI: 10.1103/PhysRevB.81.115111

\\ ( http://arxiv.org/abs/0911.0934 , 875kb)

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\\

arXiv:1001.4763

replaced with revised version Tue, 14 Sep 2010 16:34:36 GMT (4844kb)

Title: Compressibility, zero sound, and effective mass of a fermionic dipolar

gas at finite temperature

Authors: J. P. Kestner, S. Das Sarma

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

Comments: 19 pages, 12 figures; substantially revised and expanded

Journal-ref: Phys. Rev. A 82, 033608 (2010)

DOI: 10.1103/PhysRevA.82.033608

\\ ( http://arxiv.org/abs/1001.4763 , 4844kb)

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\\

arXiv:1006.0181 (*cross-listing*)

replaced with revised version Tue, 14 Sep 2010 18:05:07 GMT (197kb,D)

Title: The two faces of quantum sound

Authors: C. Barcelo, L.J. Garay, G. Jannes

Categories: gr-qc cond-mat.quant-gas

Comments: 12 pages, 4 figures; v3: published version

Journal-ref: Phys.Rev.D82, 044042 (2010)

DOI: 10.1103/PhysRevD.82.044042

\\ ( http://arxiv.org/abs/1006.0181 , 197kb)

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\\

arXiv:1005.1399

replaced with revised version Wed, 15 Sep 2010 01:35:07 GMT (34kb)

Title: Simulating Wess-Zumino Supersymmetry Model in Optical Lattices

Authors: Yue Yu and Kun Yang

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

Comments: 4 pages, 1 figure, acceptance for Phys Rev Lett

\\ ( http://arxiv.org/abs/1005.1399 , 34kb)

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\\

arXiv:0910.2431

replaced with revised version Wed, 15 Sep 2010 02:18:49 GMT (90kb)

Title: Modulated pair condensate of p-orbital ultracold fermions

Authors: Zixu Zhang, Hsiang-Hsuan Hung, Chiu Man Ho, Erhai Zhao, W. Vincent Liu

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

Comments: final version, 6 pages, 5 figures

Journal-ref: Phys. Rev. A 82, 033610 (2010)

DOI: 10.1103/PhysRevA.82.033610

\\ ( http://arxiv.org/abs/0910.2431 , 90kb)

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\\

arXiv:1009.1072

replaced with revised version Wed, 15 Sep 2010 09:58:51 GMT (434kb,D)

Title: Supersolid phases of dipolar bosons in optical lattices with a staggered

flux

Authors: O. Tieleman, A. Lazarides, and C. Morais Smith

Categories: cond-mat.quant-gas

Comments: 11 pages; added references, minor changes in text

Report-no: ITP-UU-10/32

\\ ( http://arxiv.org/abs/1009.1072 , 434kb)

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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 - 10:05:09 EST

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