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

Date: Mon, 02 Jun 2008 17:54:20 +1000

Date: Mon, 02 Jun 2008 17:54:20 +1000

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

Hi everyone,

This week there are 27 new preprints and 11 replacements.

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arXiv:0805.1358

Date: Fri, 9 May 2008 14:32:47 GMT (11kb)

Title: Phonon background versus analogue Hawking radiation in Bose-Einstein

condensates

Authors: S. Wuester

Categories: cond-mat.other gr-qc

Comments: 4 pages, no figures

\\

We determine the feasibility of detecting analogue Hawking radiation in a

Bose-Einstein condensate in the presence of atom loss induced heating. We find

that phonons created by three-body losses overshadow those due to analogue

Hawking radiation. To overcome this problem, three-body losses may have to be

suppressed, for example as proposed by Search et al. [Phys. Rev. Lett. 92

140401 (2004)]. The reduction of losses to a few percent of their normal rate

is typically sufficient to suppress the creation of loss phonons on the time

scale of a fast analogue Hawking phonon detection.

\\ ( http://arxiv.org/abs/0805.1358 , 11kb)

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arXiv:0805.1256

Date: Fri, 9 May 2008 00:23:42 GMT (843kb,D)

Title: Dissipation-driven quantum phase transitions in collective spin systems

Authors: S. Morrison and A. S. Parkins

Categories: quant-ph

Comments: 13 pages, 17 figures

\\

We consider two different collective spin systems subjected to strong

dissipation -- on the same scale as interaction strengths and external fields

-- and show that either continuous or discontinuous dissipative quantum phase

transitions can occur as the dissipation strength is varied. First, we consider

a well known model of cooperative resonance fluorescence that can exhibit a

second-order quantum phase transition, and analyze the entanglement properties

near the critical point. Next, we examine a dissipative version of the

Lipkin-Meshkov-Glick interacting collective spin model, where we find that

either first- or second-order quantum phase transitions can occur, depending

only on the ratio of the interaction and external field parameters. We give

detailed results and interpretation for the steady state entanglement in the

vicinity of the critical point, where it reaches a maximum. For the first-order

transition we find that the semiclassical steady states exhibit a region of

bistability and we show that homodyne spectra of the system provide a clear

signature of this behaviour.

\\ ( http://arxiv.org/abs/0805.1256 , 843kb)

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arXiv:0805.1402

Date: Fri, 9 May 2008 19:47:31 GMT (216kb)

Title: QND measurements and state preparation in quantum gases by light

detection

Authors: Igor B. Mekhov, Helmut Ritsch

Categories: quant-ph

Comments: 4 pages, 3 figures

\\

We consider light scattering from ultracold atoms trapped in an optical

lattice into a cavity. The measurement of photons leaking out the cavity

provides a quantum nondemolition (QND) access to various atomic variables.

Depending on the chosen geometry the time resolved light detection projects the

atomic quantum state to various atom-number squeezed and Schroedinger cat

states. Modifications of the atomic and light properties at a single quantum

trajectory are demonstrated. The quantum structure of final states can be

revealed by further observations of the same sample.

\\ ( http://arxiv.org/abs/0805.1402 , 216kb)

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arXiv:0805.1408

Date: Fri, 9 May 2008 20:14:32 GMT (433kb,D)

Title: Solids and supersolids of three-body interacting polar molecules in an

optical lattice

Authors: Kai P. Schmidt, Julien Dorier, Andreas Laeuchli

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

Comments: 4+ pages, 4 figures

\\

We study the physics of cold polar molecules loaded into an optical lattice

in the regime of strong three-body interactions, as put forward recently by

B\"uchler [Nat. Phys. 3, 726 (2007)]. To this end quantum Monte Carlo

simulations, exact diagonalization and a semiclassical approach are used to

explore hardcore bosons on the two-dimensional square lattice which interact

solely by long ranged three-body terms. The resulting phase diagram shows a

sequence of solid and supersolid phases. Our findings are directly relevant for

future experimental implementations and open a new route towards the discovery

of a lattice supersolid phase in experiment.

\\ ( http://arxiv.org/abs/0805.1408 , 433kb)

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arXiv:0805.1507

Date: Sun, 11 May 2008 04:35:55 GMT (324kb)

Title: Maximizing the Neel temperature of fermions in a simple-cubic optical

lattice

Authors: C.J.M. Mathy and David A. Huse

Categories: cond-mat.str-el

Comments: 4 pages, 3 figures

\\

For a simple-cubic optical lattice with lattice spacing d, occupied by two

species of fermionic atoms of mass m that interact repulsively, we ask what

conditions maximize the Neel temperature in the Mott insulating phase at

density one atom per site, with equal numbers of the two species. This maximum

occurs near the edge of the regime where the system is well-approximated by the

usual Hubbard model. The correction to the Hubbard-model approximation that

produces a ``direct'' ferromagnetic interaction between atoms in

nearest-neighbor Wannier orbitals is the leading term that limits how high the

Neel temperature can be made.

\\ ( http://arxiv.org/abs/0805.1507 , 324kb)

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arXiv:0805.1641

Date: Mon, 12 May 2008 13:54:15 GMT (626kb)

Title: Breathing mode frequencies of a rotating Fermi gas in the BCS-BEC

crossover region

Authors: Theja N. De Silva

Categories: cond-mat.other

Comments: 6 pages, 8 fiqures

\\

We study the breathing mode frequencies of a rotating Fermi gas trapped in a

harmonic plus radial quartic potential. We find that as the radial

anharmonicity increases, the lowest order radial mode frequency increases while

the next lowest order radial mode frequency decreases. Then at a critical

anharmonicity, these two modes merge and beyond this merge the cloud is

unstable against the oscillations. The critical anharmonicity depends on both

rotational frequency and the chemical potential. As a result of the large

chemical potential in the BCS regime, even with a weak anharmonicity the lowest

order mode frequency increases with decreasing the attractive interaction. For

large enough anharmonicities in the weak coupling BCS limit, we find that the

excitation of the breathing mode frequencies make the atomic cloud unstable.

\\ ( http://arxiv.org/abs/0805.1641 , 626kb)

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arXiv:0805.1416

Date: Fri, 9 May 2008 20:36:33 GMT (877kb)

Title: Novel Coherent Optical Medium Based on Buffer-Gas-Cooled Rb Vapor

Authors: Tao Hong, Alexey V. Gorshkov, David Patterson, Alexander S. Zibrov,

John M. Doyle, Mikhail D. Lukin, and Mara G. Prentiss

Categories: quant-ph

Comments: 4 pages, 4 figures

\\

We demonstrate a novel coherent optical medium with high optical depth and

low Doppler broadening that offers metastable states with low collisional and

motional decoherence. In our approach, helium buffer gas cools 87Rb atoms to

below 7 K, while at the same time slowing atom diffusion. We demonstrate that

electromagnetically induced transparency (EIT) allows 50% transmission in a

medium with initial OD > 70. Slow pulse propagation experiments in this medium

yield delays exceeding initial pulse duration by a factor > 25. Efficient

four-wave mixing is observed in the high-OD regime, resulting in a pronounced

modification of the atomic optical response.

\\ ( http://arxiv.org/abs/0805.1416 , 877kb)

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arXiv:0805.1576

Date: Mon, 12 May 2008 02:51:49 GMT (13kb)

Title: Manifestation of Hamiltonian chaos in an open quantum system with

ballistic atoms in an optical lattice

Authors: V.Yu. Argonov and S.V. Prants

Categories: quant-ph

Comments: 4 pages, 1 figure

\\

Manifestation of dynamical instability and Hamiltonian chaos in the

fundamental near-resonant matter-radiation interaction has been found

analitically and in a Monte Carlo simulation in the behavior of atoms moving in

a rigid optical lattice. Character of diffusion of spontaneously emitting atoms

changes abruptly in the range of the values of parameters and initial

conditions where their Hamiltonian dynamics is shown to be chaotic

\\ ( http://arxiv.org/abs/0805.1576 , 13kb)

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arXiv:0805.1714

Date: Mon, 12 May 2008 19:08:19 GMT (316kb)

Title: Light scattering and localization in an ultracold and dense atomic

system

Authors: I.M. Sokolov, M.D. Kupriyanova, D.V. Kupriyanov, M.D. Havey

Categories: quant-ph

\\

The quantum optical response of high density ultracold atomic systems is

critical to a wide range of fundamentally and technically important physical

processes. These include quantum image storage, optically based quantum

repeaters and ultracold molecule formation. We present here a microscopic

analysis of the light scattering on such a system, and we compare it with a

corresponding description based on macroscopic Maxwell theory. Results are

discussed in the context of the spectral resonance structure, time-dependent

response, and the light localization problem.

\\ ( http://arxiv.org/abs/0805.1714 , 316kb)

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arXiv:0805.1770

Date: Tue, 13 May 2008 02:19:46 GMT (24kb)

Title: D-anyons: one-dimensional anyons with competing $\delta$-function and

derivative $\delta$-function potentials

Authors: M. T. Batchelor, X.-W. Guan and A. Kundu

Categories: cond-mat.stat-mech

Comments: 9 pages, 2 figures

\\

We propose an exactly solvable model of anyons confined to one dimension with

competing $\delta$-function and derivative $\delta$-function interaction

potentials. The Bethe ansatz equations are derived in terms of the $N$-particle

sector for the quantum anyonic field model of the generalized derivative

nonlinear Schr\"{o}dinger equation. This more general anyon model exhibits

richer physics than that of the recently studied one-dimensional model of

$\delta$-function interacting anyons. We show that the anyonic signature is

inextricably related to the velocities of the colliding particles and the

pairwise dynamical interaction between particles.

\\ ( http://arxiv.org/abs/0805.1770 , 24kb)

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arXiv:0805.1784

Date: Tue, 13 May 2008 06:30:13 GMT (41kb)

Title: Pairing in spin polarized two-species fermionic mixtures with mass

asymmetry

Authors: S. A. Silotri, D. Angom, H. Mishra and Amruta Mishra

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

Comments: 8 pages and 6 figures

\\

We discuss on the pairing mechanism of fermions with mismatch in their fermi

momenta due to a mass asymmetry. Using a variational ansatz for the ground

state we also discuss the BCS -BEC crossover of this system. It is shown that

the breached pairing solution with a single fermi surface is stable in the BEC

regime. We also include the temperatures effect on the fermion pairing within

an approximation that is valid for temperatures much below the critical

temperature.

\\ ( http://arxiv.org/abs/0805.1784 , 41kb)

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arXiv:0805.1817

Date: Tue, 13 May 2008 10:30:37 GMT (189kb)

Title: Atom Chip Diffraction of Bose-Einstein Condensates: The Role of

Inter-Atomic Interactions

Authors: T. E. Judd, R. G. Scott, T. M. Fromhold

Categories: cond-mat.other

Comments: 5 pages, 4 figures

\\

We use supercomputer simulations to show that inter-atomic interactions can

strongly affect the phase evolution of Bose-Einstein condensates that are

diffracted from atom chips, thereby explaining recent experiments. Interactions

broaden and depopulate non-central diffraction orders, meaning that the

experiments cannot be fully described by non-interacting theories.

Consequently, interferometers that use many interacting atoms to enhance

sensitivity are highly nonlinear devices requiring complex calibration. We

identify device geometries required to approximate non-interacting behavior.

\\ ( http://arxiv.org/abs/0805.1817 , 189kb)

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arXiv:0805.1832

Date: Tue, 13 May 2008 12:28:48 GMT (164kb)

Title: Bosonic amplification of noise-induced suppression of phase diffusion

Authors: Y. Khodorkovsky, G. Kurizki, A. Vardi

Categories: cond-mat.other

Comments: 5 pages, 4 figures

\\

We study the effect of noise-induced dephasing on collisional phase-diffusion

in the two-site Bose-Hubbard model. Dephasing of the quasi-momentum modes may

slow down phase-diffusion in the quantum Zeno limit. Remarkably, the degree of

suppression is enhanced by a bosonic factor of order $N/\log{N}$ as the

particle number $N$ increases.

\\ ( http://arxiv.org/abs/0805.1832 , 164kb)

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arXiv:0805.1896

Date: Tue, 13 May 2008 17:03:49 GMT (7006kb)

Title: Condensed Matter Physics with Cold Polar Molecules

Authors: G. Pupillo, A. Micheli, H.P. B\"uchler, and P. Zoller

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

Comments: Chapter of the book: "Cold molecules: Creation and applications",

edited by R. V. Krems, B. Friedrich and W. C. Stwalley, and published by

Taylor & Francis

\\

In this review chapter we focus on the many-body dynamics of cold polar

molecules in the strongly interacting regime. In particular, we discuss a

toolbox for engineering many-body Hamiltonians based on the manipulation of the

electric dipole moments of the molecules, and thus of molecular interactions,

using external static and microwave fields. This forms the basis for the

realization of novel quantum phases in these systems.

\\ ( http://arxiv.org/abs/0805.1896 , 7006kb)

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arXiv:0803.2712

Date: Wed, 19 Mar 2008 09:51:39 GMT (691kb)

Title: Nonlinear spectroscopy of photons bound to one atom

Authors: I. Schuster, A. Kubanek, A. Fuhrmanek, T. Puppe, P.W.H. Pinkse, K.

Murr and G. Rempe

Categories: quant-ph cond-mat.other

Comments: 7 figures, Nature Physics

Journal-ref: Nature Physics 4, 382-385 (2008)

DOI: 10.1038/nphys940

\\

Optical nonlinearities typically require macroscopic media, thereby making

their implementation at the quantum level an outstanding challenge. Here we

demonstrate a nonlinearity for one atom enclosed by two highly reflecting

mirrors. We send laser light through the input mirror and record the light from

the output mirror of the cavity. For weak laser intensity, we find the

vacuum-Rabi resonances. But for higher intensities, we find an additional

resonance. It originates from the fact that the cavity can accommodate only an

integer number of photons and that this photon number determines the

characteristic frequencies of the coupled atom-cavity system. We selectively

excite such a frequency by depositing at once two photons into the system and

find a transmission which increases with the laser intensity squared. The

nonlinearity differs from classical saturation nonlinearities and is direct

spectroscopic proof of the quantum nature of the atom-cavity system. It

provides a photon-photon interaction by means of one atom, and constitutes a

step towards a two-photon gateway or a single-photon transistor.

\\ ( http://arxiv.org/abs/0803.2712 , 691kb)

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arXiv:0805.1812

Date: Tue, 13 May 2008 10:52:40 GMT (83kb)

Title: Two-particle states in the Hubbard model

Authors: Manuel Valiente, David Petrosyan

Categories: quant-ph

Comments: 3 pages, 1 figure

\\

We consider a pair of bosonic particles in a 1D tight-binding periodic

potential described by the Hubbard model with attractive or repulsive on-site

interaction. We derive explicit analytic expressions for the two-particle

states, which can be classified as (i) scattering states of asymptotically free

particles and (ii) interaction-bound dimer states. Our results provide a very

transparent framework to understand the properties of interacting pairs of

particles in a lattice.

\\ ( http://arxiv.org/abs/0805.1812 , 83kb)

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arXiv:0805.1948

Date: Wed, 14 May 2008 00:58:43 GMT (226kb,D)

Title: Avalanches of Bose-Einstein Condensates in Leaking Optical Lattices

Authors: G. S. Ng, H. Hennig, R. Fleischmann, T. Kottos, and T. Geisel

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

Comments: 7 pages and 3 figures

\\

One of the most fascinating experimental achievements of the last decade was

the realization of Bose-Einstein Condensation (BEC) of ultra-cold atoms in

optical lattices (OL's). The extraordinary level of control over these

structures allows us to investigate complex solid state phenomena and the

emerging field of ``atomtronics'' promises a new generation of nanoscale

devices. It is therefore of fundamental and technological importance to

understand their dynamical properties. Here we study the outgoing atomic flux

of BECs loaded in an one-dimensional OL with leaking edges, using a mean field

description provided by the Discrete Non-Linear Schrodinger Equation (DNLSE).

We demonstrate that the atom population inside the OL decays in avalanches of

size $J$. For intermediate values of the interatomic interaction strength their

distribution ${\cal P}(J)$ follows a power law i.e. ${\cal

P}(J)\sim1/J^{\alpha}$ characterizing systems at phase transition. This scale

free behaviour of ${\cal P}(J)$ reflects the complexity and the hierarchical

structure of the underlying classical mixed phase space. Our results are

relevant in a variety of contexts (whenever DNLSE is adequate), most

prominently the light emmitance from coupled non-linear optics waveguides.

\\ ( http://arxiv.org/abs/0805.1948 , 226kb)

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arXiv:0805.1988

Date: Wed, 14 May 2008 07:38:11 GMT (99kb)

Title: Ground-state properties of one-dimensional anyon gases

Authors: Yajiang Hao, Yunbo Zhang, Shu Chen

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

Comments: 6 pages, 5 figures

\\

We investigate the ground state of the one-dimensional interacting anyonic

system based on the exact Bethe ansatz solution for arbitrary coupling constant

($0\leq c\leq \infty$) and statistics parameter ($0\leq \kappa \leq \pi$). It

is shown that the density of state in quasi-momentum $k$ space and the ground

state energy are determined by the renormalized coupling constant $c'$. The

effect induced by the statistics parameter $\kappa$ exhibits in the momentum

distribution in two aspects: Besides the effect of renormalized coupling, the

anyonic statistics results in the nonsymmetric momentum distribution when the

statistics parameter $\kappa$ deviates from 0 (Bose statistics) and $\pi$

(Fermi statistics) for any coupling constant $c$. The momentum distribution

evolves from a Bose distribution to a Fermi one as $\kappa$ varies from 0 to

$\pi$.

\\ ( http://arxiv.org/abs/0805.1988 , 99kb)

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arXiv:0805.2130

Date: Wed, 14 May 2008 18:22:26 GMT (17kb)

Title: The Trapped Polarized Fermi Gas at Unitarity

Authors: D. Blume

Categories: cond-mat.other

Comments: 4 pages, 2 tables, 2 figures

\\

We consider population-imbalanced two-component Fermi gases under external

harmonic confinement interacting through short-range two-body potentials with

diverging s-wave scattering length. Using the fixed-node diffusion Monte Carlo

method, the energies of the "normal state" are determined as functions of the

population-imbalance and the number of particles. The energies of the trapped

system follow, to a good approximation, a universal curve even for fairly small

systems. A simple parameterization of the universal curve is presented and

related to the equation of state of the bulk system.

\\ ( http://arxiv.org/abs/0805.2130 , 17kb)

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arXiv:0805.1927

Date: Wed, 14 May 2008 00:50:13 GMT (185kb)

Title: Optimal light storage with full pulse shape control

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

Categories: quant-ph

Comments: 5 pages, 3 figures

\\

We experimentally demonstrate optimal storage and retrieval of light pulses

of arbitrary shape in atomic ensembles. By shaping auxiliary control pulses, we

attain efficiencies approaching the fundamental limit and achieve precise

retrieval into any predetermined temporal profile. Our techniques, demonstrated

in warm Rb vapor, are applicable to a wide range of systems and protocols. As

an example, we present their potential application to the creation of optical

time-bin qubits and to controlled partial retrieval.

\\ ( http://arxiv.org/abs/0805.1927 , 185kb)

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arXiv:0805.2040

Date: Wed, 14 May 2008 11:52:17 GMT (382kb)

Title: Quantum Accelerator Modes near Higher-Order Resonances

Authors: Italo Guarneri and Laura Rebuzzini

Categories: quant-ph

Comments: accepted for publication in Phys. Rev. Lett

\\

Quantum Accelerator Modes have been experimentally observed, and

theoretically explained, in the dynamics of kicked cold atoms in the presence

of gravity, when the kicking period is close to a half-integer multiple of the

Talbot time. We generalize the theory to the case when the kicking period is

sufficiently close to any rational multiple of the Talbot time, and thus

predict new rich families of experimentally observable Quantum Accelerator

Modes.

\\ ( http://arxiv.org/abs/0805.2040 , 382kb)

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arXiv:0805.2078

Date: Wed, 14 May 2008 14:45:26 GMT (11kb,D)

Title: Barrier transmission for the Nonlinear Schr\"odinger Equation:

Engineering nonlinear transport

Authors: K. Rapedius, H. J. Korsch

Categories: quant-ph

Comments: 6 pages, 2 figures

\\

In this communication we report on a peculiar property of barrier

transmission that systems governed by the nonlinear Schroedinger equation share

with the linear one: For unit transmission the potential can be divided at an

arbitrary point into two sub-potentials, a left and a right one, which have

exactly the same transmission. This is a rare case of an exact property of a

nonlinear wave function which will be of interest, e.g., for studies of

coherent transport of Bose-Einstein condensates through mesoscopic waveguide

\\ ( http://arxiv.org/abs/0805.2078 , 11kb)

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arXiv:0805.2120

Date: Wed, 14 May 2008 17:22:58 GMT (381kb)

Title: Quantum Billiards in Optical Lattices

Authors: Simone Montangero, Diego Frustaglia, Tommaso Calarco, Rosario Fazio

Categories: quant-ph

\\

We study finite two dimensional spin lattices with definite geometry (spin

billiards) demonstrating the display of collective integrable or chaotic

dynamics depending on their shape. We show that such systems can be quantum

simulated by ultra-cold atoms in optical lattices and discuss how to identify

their dynamical features in a realistic experimental setup. Possible

applications are the simulation of quantum information tasks in mesoscopic

devices.

\\ ( http://arxiv.org/abs/0805.2120 , 381kb)

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arXiv:0805.1784

Date: Tue, 13 May 2008 06:30:13 GMT (41kb)

Title: Pairing in spin polarized two-species fermionic mixtures with mass

asymmetry

Authors: S. A. Silotri, D. Angom, H. Mishra and Amruta Mishra

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

Comments: 8 pages and 6 figures

\\

We discuss on the pairing mechanism of fermions with mismatch in their fermi

momenta due to a mass asymmetry. Using a variational ansatz for the ground

state we also discuss the BCS -BEC crossover of this system. It is shown that

the breached pairing solution with a single fermi surface is stable in the BEC

regime. We also include the temperatures effect on the fermion pairing within

an approximation that is valid for temperatures much below the critical

temperature.

\\ ( http://arxiv.org/abs/0805.1784 , 41kb)

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arXiv:0805.2204

Date: Thu, 15 May 2008 04:03:40 GMT (620kb)

Title: Role of the Majorana Fermion and the Edge Mode in Chiral Superfluidity

near a p-Wave Feshbach Resonance

Authors: T. Mizushima, M. Ichioka, K. Machida

Categories: cond-mat.supr-con

Comments: 5 pages, 4 figures

\\

The Majorana zero energy mode of the vortex core and the edge mode are

investigated in chiral p-wave superfluid Fermi gases near p-wave Feshbach

resonance. We find that they survive until the strong coupling BCS regime is

approached from the weak coupling limit, but vanish in the BEC regime. We study

the roles of these modes in connection with (i) vortex visualization by the

density depletion inside the vortex core and (ii) intrinsic angular momentum in

vortex free states. Both (i) and (ii) are found to provide experimental methods

to detect evidence of the p-wave superfluidity.

\\ ( http://arxiv.org/abs/0805.2204 , 620kb)

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arXiv:0805.2210

Date: Thu, 15 May 2008 05:03:31 GMT (534kb)

Title: Dynamical Casimir effect for magnons in a spinor Bose-Einstein

condensate

Authors: Hiroki Saito and Hiroyuki Hyuga

Categories: cond-mat.other

Comments: 8 pages, 3 figures

\\

Magnon excitation in a spinor Bose-Einstein condensate by a driven magnetic

field is shown to have a close analogy with the dynamical Casimir effect. A

time-dependent external magnetic field amplifies quantum fluctuations in the

magnetic ground state of the condensate, leading to magnetization of the

system. The magnetization occurs in a direction perpendicular to the magnetic

field breaking the rotation symmetry. This phenomenon is numerically

demonstrated and the excited quantum field is shown to be squeezed.

\\ ( http://arxiv.org/abs/0805.2210 , 534kb)

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arXiv:0805.2180

Date: Wed, 14 May 2008 22:15:24 GMT (498kb)

Title: Quantum Metrology: Dynamics vs. Entanglement

Authors: Sergio Boixo, Animesh Datta, Matthew J. Davis, Steven T. Flammia, Anil

Shaji, Carlton M. Caves

Categories: quant-ph

Comments: 4 pages, 1 figure

\\

A parameter whose coupling to a quantum probe of $n$ constituents includes

all two-body interactions between the constituents can be measured with an

uncertainty that scales as $1/n^{3/2}$, even when the constituents are

initially unentangled. We devise a protocol that achieves the $1/n^{3/2}$

scaling without generating any entanglement among the constituents, and we

suggest that the protocol might be implemented in a two-component Bose-Einstein

condensate.

\\ ( http://arxiv.org/abs/0805.2180 , 498kb)

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The replacements:

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arXiv:quant-ph/0703044

replaced with revised version Fri, 9 May 2008 18:02:40 GMT (1897kb)

Title: Entanglement in Many-Body Systems

Authors: Luigi Amico, Rosario Fazio, Andreas Osterloh, and Vlatko Vedral

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

Comments: 61 pages, 29 figures

Journal-ref: Rev. Mod. Phys. vol. 80, 517-576 (2008)

\\ ( http://arxiv.org/abs/quant-ph/0703044 , 1897kb)

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arXiv:0704.3047

replaced with revised version Mon, 12 May 2008 19:39:59 GMT (949kb)

Title: Observation of atom pairs in spontaneous four wave mixing of two

colliding Bose-Einstein Condensates

Authors: A. Perrin (LCFIO), H. Chang (LCFIO), V. Krachmalnicoff (LCFIO), M.

Schellekens (LCFIO), D. Boiron (LCFIO), A. Aspect (LCFIO), C. I. Westbrook

(LCFIO)

Categories: quant-ph cond-mat.other

Comments: A few typos have been corrected

Journal-ref: Physical Review Letters 99, 15 (2007) 150405

DOI: 10.1103/PhysRevLett.99.150405

\\ ( http://arxiv.org/abs/0704.3047 , 949kb)

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arXiv:0709.1763

replaced with revised version Mon, 12 May 2008 03:16:46 GMT (92kb)

Title: Magnetic Phase Transitions in One-dimensional Strongly Attractive

Three-Component Ultracold Fermions

Authors: X.W. Guan, M.T. Batchelor, C. Lee and H.-Q. Zhou

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

Comments: 4 pages, 3 figures, minor revisions to text, replacement figure, refs

added and updated

\\ ( http://arxiv.org/abs/0709.1763 , 92kb)

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arXiv:0711.4520

replaced with revised version Mon, 12 May 2008 11:57:05 GMT (133kb)

Title: Non-local density correlations as signal of Hawking radiation in BEC

acoustic black holes

Authors: Roberto Balbinot, Alessandro Fabbri, Serena Fagnocchi, Alessio Recati

and Iacopo Carusotto

Categories: cond-mat.other gr-qc hep-th

Comments: Strongly revised version. 5 pages, 3 eps figures

\\ ( http://arxiv.org/abs/0711.4520 , 133kb)

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arXiv:0712.4284

replaced with revised version Mon, 12 May 2008 17:55:30 GMT (494kb)

Title: The $p_{x,y}$-orbital counterpart of graphene: cold atoms in the

honeycomb optical lattice

Authors: Congjun Wu and S. Das Sarma

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

\\ ( http://arxiv.org/abs/0712.4284 , 494kb)

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arXiv:0712.1805

replaced with revised version Sun, 11 May 2008 18:54:44 GMT (807kb)

Title: Quantum control of EIT dispersion via atomic tunneling in a double-well

Bose-Einstein condensate

Authors: James Owen Weatherall, Christopher P. Search, and Markku Jaaskelainen

Categories: quant-ph

\\ ( http://arxiv.org/abs/0712.1805 , 807kb)

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arXiv:0712.1990

replaced with revised version Sun, 11 May 2008 07:40:08 GMT (363kb)

Title: Atom Interferometry with up to 24-Photon-Momentum-Transfer Beam

Splitters

Authors: Holger Mueller, Sheng-wey Chiow, Quan Long, Sven Herrmann, and Steven

Chu

Categories: physics.atom-ph physics.optics

Comments: New introduction. 4 pages, 4 figures

Journal-ref: Phys. Rev. Lett. 100, 180405 (2008)

\\ ( http://arxiv.org/abs/0712.1990 , 363kb)

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\\

arXiv:0801.4000

replaced with revised version Tue, 13 May 2008 10:36:06 GMT (145kb)

Title: Self-trapping of impurities in Bose-Einstein condensates: Strong

attractive and repulsive coupling

Authors: M. Bruderer, W. Bao and D. Jaksch

Categories: quant-ph

Comments: 7 pages, 5 figures

Journal-ref: Europhysics Letters 82, 30004 (2008)

DOI: 10.1209/0295-5075/82/30004

\\ ( http://arxiv.org/abs/0801.4000 , 145kb)

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\\

arXiv:0712.2571

replaced with revised version Wed, 14 May 2008 11:35:18 GMT (559kb,D)

Title: Ultracold atomic gas in non-Abelian "magnetic" fields: the quantum Hall

effect supremacy

Authors: N. Goldman, A. Kubasiak, P. Gaspard and M. Lewenstein

Categories: cond-mat.mes-hall

Comments: 4 pages, 3 figures

\\ ( http://arxiv.org/abs/0712.2571 , 559kb)

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\\

arXiv:0805.1507

replaced with revised version Tue, 13 May 2008 22:25:37 GMT (324kb)

Title: Maximizing the Neel temperature of fermions in a simple-cubic optical

lattice

Authors: C.J.M. Mathy and David A. Huse

Categories: cond-mat.str-el

Comments: 4 pages, 3 figures, minor changes

\\ ( http://arxiv.org/abs/0805.1507 , 324kb)

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\\

arXiv:0801.4000

replaced with revised version Wed, 14 May 2008 11:56:22 GMT (146kb)

Title: Self-trapping of impurities in Bose-Einstein condensates: Strong

attractive and repulsive coupling

Authors: M. Bruderer, W. Bao and D. Jaksch

Categories: quant-ph

Comments: 7 pages, 5 figures

Journal-ref: EuroPhys. Lett. 82, 30004 (2008)

DOI: 10.1209/0295-5075/82/30004

\\ ( http://arxiv.org/abs/0801.4000 , 146kb)

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Till next time,

Matt.

-- ========================================================================= Dr M. J. Davis, Senior Lecturer in Physics School of Physical Sciences, email: mdavis_at_physics.uq.edu.au University of Queensland, ph : +61 7 334 69824 Brisbane, QLD 4072, fax : +61 7 336 51242 Australia. http://www.physics.uq.edu.au/people/mdavis/ ========================================================================= Matt's arXiv selection: weekly summary of cold-atom papers from arXiv.org http://www.physics.uq.edu.au/people/mdavis/matts_arXiv/ ========================================================================= Legal stuff: Unless stated otherwise, this e-mail represents only the views of the sender and not the views of the University of Queensland =========================================================================Received on Tue Jun 03 2008 - 08:26:18 EST

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