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

Date: Fri, 13 Jan 2006 12:10:04 +1000 (EST)

Date: Fri, 13 Jan 2006 12:10:04 +1000 (EST)

Hi all,

Apologies for the lateness of this week's mailing - caused by the birth of

Juliette Davis on Monday!

I have now begun a mailing list for this service - to subscribe send a

message to

majordomo_at_acqao.org

and in the body of the message have the command:

subscribe matts_arxiv

Please let your friends know that this exists - it would be nice to get a

big list of subscribers as some publicity for the Centre of Excellence.

I will be begining a webpage with an archive of mailings once my life gets

closer to being back to normal!

Cheers,

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/ ------------------------------------------------------------------------- ------------------------------------------------------------------------------ \\ Paper: cond-mat/0512693 Date: Thu, 29 Dec 2005 06:32:11 GMT (45kb) Title: Ferromagnetic phase transition in spinor Bose gases Authors: Qiang Gu Comments: 20 pages, 3 figures, Book chapter in "Progress in Ferromagnetic Research, Edited by V.N. Murray (Nova Science Publishers, New York, 2005) Subj-class: Other; Superconductivity \\ The achievement in cooling alkali atomic gases, such as $^{87}$Rb, $^{23}$Na and $^{7}$Li, to quantum degeneracy opens up a way to study magnetism in spinor bosons, because these constituent atoms usually have a hyperfine spin degree of freedom. This article reviews several basic problems related to the ferromagnetic phase transition in spinor atomic Bose gases from a theoretical perspective. After a brief discussion on various possible origins of the ferromagnetic interaction, the phase diagram of the ferromagnetically coupled spinor bosons is investigated. It is found that the ferromagnetic transition occurs always above Bose-Einstein condensation and the Bose condensate is fully polarized. The low-lying collective excitations of the spinor condensate, including spin and density modes, are discussed. The spectrum of the density mode is of the Bogliubov form and the spin wave spectrum has a $k^2$-formed dispersion relation at long wavelengths. The spin-wave stiffness coefficient contains contribut \\ ( http://arXiv.org/abs/cond-mat/0512693 , 45kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0512716 Date: Fri, 30 Dec 2005 03:08:54 GMT (128kb) Title: Oscillations of Bose condensates in a one-dimensional optical superlattice Authors: C. C. Huang, W. C. Wu Comments: 5 pages,2 figures Subj-class: Other Journal-ref: PHYSICAL REVIEW A 72, 065601 (2005) \\ Oscillations of atomic Bose-Einstein condensates in a 1D optical lattice with a two-point basis is investigated. In the low-frequency regime, four branches of modes are resolved, that correspond to the transverse in-phase and out-of-phase breathing modes, and the longitudinal acoustic and optical phonon modes of the condensates. Dispersions of these modes depend intimately on the values of two intersite Josephson tunneling strengths, $J_1$ and $J_2$, and the on-site repulsion $U$ between the atoms. Observation of these mode dispersions is thus a direct way to access them. \\ ( http://arXiv.org/abs/cond-mat/0512716 , 128kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0511207 replaced with revised version Thu, 29 Dec 2005 19:12:25 GMT (10kb) Title: Quantum Statistics with Classical Particles Authors: Daniel Gottesman Comments: 5 pages. v2 adds one reference Subj-class: Statistical Mechanics; Other \\ ( http://arXiv.org/abs/cond-mat/0511207 , 10kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0512248 Date: Thu, 29 Dec 2005 13:11:03 GMT (111kb) Title: Can quantum computing solve classically unsolvable problems? Authors: Andrew Hodges \\ T. D. Kieu has claimed that a quantum computing procedure can solve a classically unsolvable problem. Recent work of W. D. Smith has shown that Kieu's central mathematical claim cannot be sustained. Here, a more general critique is given of Kieu's proposal and some suggestions are made regarding the Church-Turing thesis. \\ ( http://arXiv.org/abs/quant-ph/0512248 , 111kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0512249 Date: Thu, 29 Dec 2005 14:07:21 GMT (438kb) Title: Ground state overlap, quantum phase transitions and the orthogonality catastrophe Authors: Paolo Zanardi and Nikola Paunkovi\'c Comments: 4 pages \\ We present a characterization of quantum phase transitions in terms of the the overlap function between two ground states obtained for two different values of external parameters. On the examples of the Dicke and XY models, we show that the regions of criticality of a system are marked by the extremal points of the overlap and functions closely related to it. Further, we discuss the connections of this approach and with the Anderson orthogonality catastrophe as well as with the dynamical study of the Loschmidt echo for critical systems. \\ ( http://arXiv.org/abs/quant-ph/0512249 , 438kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0512250 Date: Thu, 29 Dec 2005 14:26:54 GMT (79kb) Title: Temperature effects on mixed state geometric phase Authors: A. T. Rezakhani and P. Zanardi Comments: 5 pages \\ Geometric phase of an open quantum system in interaction with a thermal environment is studied. To gain insight on how thermal effects can change geometric phase we study some simple models. The system is considered to be a simple spin-half particle which is interacting with a bath. These different models generally show that GP can vary even when the system is weakly coupled to environment. As the final example we consider the system under an adiabatically time varying magnetic field which is weakly coupled to thermal environment. An important feature of this model is that it reveals existence of a temperature scale in which adiabaticity condition is preserved. This temperature is exactly the one in which geometric phase vanishes. \\ ( http://arXiv.org/abs/quant-ph/0512250 , 79kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0512251 Date: Thu, 29 Dec 2005 15:27:29 GMT (214kb) Title: Entropy: An inherent, nonstatistical property of any system in any state Authors: Elias P. Gyftopoulos Comments: 13 pages \\ Entropy is the distinguishing and most important concept of our efforts to understand and regularize our observations of a very large class of natural phenomena, and yet, it is one of the most contentious concepts of physics. In this article, we review two expositions of thermodynamics, one without reference to quantum theory, and the other quantum mechanical without probabilities of statistical mechanics. In the first, we show that entropy is an inherent property of any system in any state, and that its analytical expression must conform to eight criteria. In the second, we recognize that quantum thermodynamics: (i) admits quantum probabilities described either by wave functions or by nonstatistical density operators; and (ii) requires a nonlinear equation of motion that is delimited by but more general than the Schroedinger equation, and that accounts for both reversible and irreversible evolutions of the state of the system in time. Both the more general quantum probabilities, and the equation of motion have been defined, and the three laws of thermodynamics are shown to be theorems of this equation. \\ ( http://arXiv.org/abs/quant-ph/0512251 , 214kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0512259 Date: Fri, 30 Dec 2005 20:42:27 GMT (524kb) Title: Experimental Constraints of Using Slow-Light in Sodium Vapor for Light-Drag Enhanced Relative Rotation Sensing Authors: Renu Tripathi, G.S. Pati, M. Messall, K. Salit and M.S. Shahriar Comments: 18 pages, 8 figures \\ We report on experimental observation of electromagnetically induced transparency and slow-light (vg ~ c/607) in atomic sodium vapor, as a potential medium for a recently proposed experiment on slow-light enhanced relative rotation sensing [11]. We have performed an interferometric measurement of the index variation associated with a two-photon resonance to estimate the dispersion characteristics of the medium that is relevant to the slow-light based rotation sensing scheme. We also show that the presence of counter-propagating pump beams in an optical Sagnac loop produces a backward optical phase conjugation beam that can generate spurious signals, which may complicate the measurement of small rotations in the slow-light enhanced gyroscope. We identify techniques for overcoming this constraint. \\ ( http://arXiv.org/abs/quant-ph/0512259 , 524kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0512260 Date: Fri, 30 Dec 2005 20:52:22 GMT (434kb) Title: Controllable Anomalous Dispersion and Group Index Nulling via Bi-Frequency Raman Gain in Rb Vapor for application to Ultraprecision Rotation Sensing Authors: G.S. Pati, Renu Tripathi, M. Messall, K. Salit and M.S. Shahriar Comments: 23 pages, 9 figures \\ We have recently proposed [9], the use of fast-light media to obtain ultrahigh precision rotation sensing capabilities. The scheme relies on producing a critically anomalous dispersion, in a suitable dispersive medium, which is introduced in the arms of a Sagnac interferometer. We present here an experimental investigation of the anomalous dispersion properties of bi-frequency Raman gain in rubidium vapor, with the goal of using this medium for producing the critically anomalous dispersion condition. A heterodyne phase measurement technique is used to measure accurately the index variation associated with the dispersion. The slope of the negative linear dispersion (or group index) is experimentally varied by more than two orders of magnitude while changing the frequency separation between pump fields, responsible for producing gain. Using this result, we have identified the experimental parameters for achieving a null value of the group index, corresponding to the critically anomalous dispersion condition necessary for enhanced rotational sensitivity. \\ ( http://arXiv.org/abs/quant-ph/0512260 , 434kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601004 Date: Sat, 31 Dec 2005 15:13:34 GMT (75kb) Title: Theory of matter wave beam splitters in gravito-inertial and trapping potentials Authors: Charles Antoine, Christian J. Borde Comments: 33 pages, 5 figures Subj-class: Other \\ We present a strong field theory of matter wave splitting in the presence of various gravitational, inertial and trapping potentials. The effect of these potentials on the resonance condition (between the splitting potential and the considered effective two-level system) and on the atomic Borrmann effect is investigated in detail. The dispersive structuring of an incident atomic wave packet - due to such generalized beam splitters - is studied and modeled, and several important dynamical features of the solutions are detailed (generalized Rabi oscillations, velocity selection, anomalous dispersion, generalized Borrmann effect and anomalous gravitational bending). Finally, we show how to express this triple interaction "matter - splitting potential - gravito-inertial and trapping potentials" as an equivalent instantaneous interaction which turns out to be a very efficient tool for the modeling of atom interferometers. \\ ( http://arXiv.org/abs/cond-mat/0601004 , 90kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601006 Date: Sat, 31 Dec 2005 18:57:24 GMT (69kb) Title: Trapped Fermions across a Feshbach resonance with population imbalance Authors: W. Yi and L.-M. Duan Comments: 5 pages, 4 figures Subj-class: Other \\ We investigate the phase separation of resonantly interacting fermions in a trap with imbalanced spin populations, both at zero and at finite temperatures. We directly minimize the thermodynamical potential under the local density approximation instead of using the gap equation, as the latter may give unstable solutions. On the BEC side of the resonance, one may cross three different phases from the trap center to the edge; while on the BCS side or at resonance, typically only two phases show up. We compare our results with the recent experiment, and the agreement is remarkable. \\ ( http://arXiv.org/abs/cond-mat/0601006 , 69kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601011 Date: Sun, 1 Jan 2006 19:39:05 GMT (303kb) Title: Spin noise spectroscopy to probe quantum states of ultracold fermionic atomic gases Authors: Bogdan Mihaila, Scott A. Crooker, Krastan B. Blagoev, Dwight G. Rickel, Peter B. Littlewood, and Darryl L. Smith Report-no: LAUR 05-9176 Subj-class: Other; Superconductivity \\ Ultracold alkali atoms provide experimentally accessible model systems for probing quantum states that manifest themselves at the macroscopic scale. Recent experimental realizations of superfluidity in dilute gases of ultracold fermionic (half-integer spin) atoms offer exciting opportunities to directly test theoretical models of related many-body fermion systems that are inaccessible to experimental manipulation, such as neutron stars and quark-gluon plasmas. However, the microscopic interactions between fermions are potentially quite complex, and experiments in ultracold gases to date cannot clearly distinguish between the qualitatively different microscopic models that have been proposed. Here, we theoretically demonstrate that optical measurements of electron spin noise -- the intrinsic, random fluctuations of spin -- can probe the entangled quantum states of ultracold fermionic atomic gases and unambiguously reveal the detailed nature of the interatomic interactions. We show that different models predict different sets of resonances in the noise spectrum, and once the correct effective interatomic interaction model is identified, the line-shapes of the spin noise can be used to constrain this model. Further, experimental measurements of spin noise in classical (Boltzmann) alkali vapors are used to estimate the expected signal magnitudes for spin noise measurements in ultracold atom systems and to show that these measurements are feasible. \\ ( http://arXiv.org/abs/cond-mat/0601011 , 303kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601014 Date: Mon, 2 Jan 2006 03:06:29 GMT (178kb) Title: Topological Phase Transition Theory of Strongly Correlated Many Body System Authors: Tieyan Si Comments: 14 pages Subj-class: Statistical Mechanics; Strongly Correlated Electrons \\ We developed a systematic topological phase transition theory and proposed quantum phase transition of higher order. This topological phase transition theory shows that, when the system jumps from p th order phase transition to (p+1)th or (p-1)th order phase transition, there is a substantial change of the topology of the configuration space. We found an universal equation of coexistence curve in phase diagram, this equation unified the previous different special coexistence equations for different order phase transition. From this coexistence curve equation, one can arrive the phase diagram of any order phase transition, it holds both for classical and quantum phase transition. We also generalized Landau theory of phase transition, and proposed a new definition of the order of phase transition. As an application, we take the Bose-Hubbard model as an example to demonstrate how to use this method to study the quantum phase transition. We depict the first order phase diagram, it is in agreement with recent progress. Since the higher-order quantum phase transition in condensed matter physics is still virgin, we proposed the equation of the second order and higher-order phase diagram of quantum phase transition in optical lattice and expected an experimental verify. Further more, the equation of the phase diagram for a multicomponent Bose-Einstein condensate in optical lattice is also studied. We also proposed that the order of a quantum phase transition is determined by the subgroup chain of the system. \\ ( http://arXiv.org/abs/cond-mat/0601014 , 178kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601018 Date: Mon, 2 Jan 2006 09:28:45 GMT (48kb) Title: Analog of photon-assisted tunneling in a Bose-Einstein condensate Authors: Andre Eckardt, Tharanga Jinasundera, Christoph Weiss and Martin Holthaus Comments: 4 pages, 4 figures, RevTeX Subj-class: Other Journal-ref: Phys. Rev. Lett. 95, 200401 (2005) DOI: 10.1103/PhysRevLett.95.200401 \\ We study many-body tunneling of a small Bose-Einstein condensate in a periodically modulated, tilted double-well potential. Periodic modulation of the trapping potential leads to an analog of photon-assisted tunneling, with distinct signatures of the interparticle interaction visible in the amount of particles transferred from one well to the other. In particular, under experimentally accessible conditions there exist well-developed half-integer Shapiro-like resonances. \\ ( http://arXiv.org/abs/cond-mat/0601018 , 48kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601020 Date: Mon, 2 Jan 2006 09:34:10 GMT (119kb) Title: Superfluid-insulator transition in a periodically driven optical lattice Authors: Andre Eckardt, Christoph Weiss and Martin Holthaus Comments: 4 pages, 4 figures, RevTeX Subj-class: Other Journal-ref: Phys. Rev. Lett. 95, 260404 (2005) DOI: 10.1103/PhysRevLett.95.260404 \\ We demonstrate that the transition from a superfluid to a Mott insulator in the Bose-Hubbard model can be induced by an oscillating force through an effective renormalization of the tunneling matrix element. The mechanism involves adiabatic following of Floquet states, and can be tested experimentally with Bose-Einstein condensates in periodically driven optical lattices. Its extension from small to very large systems yields nontrivial information on the condensate dynamics. \\ ( http://arXiv.org/abs/cond-mat/0601020 , 119kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601032 Date: Mon, 2 Jan 2006 17:18:10 GMT (15kb) Title: Imaging of critical correlations in optical lattices and atomic traps Authors: Qian Niu, Iacopo Carusotto, and A. B. Kuklov Comments: 7 revtex pages, no figures Subj-class: Other \\ We suggest real space determination of diverging space-time correlations upon approaching a continuous phase transition within the paradigm of finite size scaling. The method relies on interference of an atomic cloud released from the optical lattice (or from the trap) with some reference Bose-Einstein condensate. As opposed to the standard absorptive imaging technique, the proposed one allows imaging of atomic many body {\it wavefunction} in the lattice (or in the trap) by projecting it on coherent states of the reference cloud. The advantage of this method is that the correlation properties of the interference pattern are robust with respect to expansion and are not, practically, affected by underlying lattice. The non-destructive scheme allows, in principle, measuring the space-time correlators of arbitrary order. \\ ( http://arXiv.org/abs/cond-mat/0601032 , 15kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0511641 replaced with revised version Mon, 2 Jan 2006 13:57:06 GMT (40kb) Title: Quantum criticality of a Fermi gas with a spherical dispersion minimum Authors: Kun Yang and Subir Sachdev Comments: 4 pages, 1 figure; (v2) added clarifications in response to comments Subj-class: Strongly Correlated Electrons; Superconductivity \\ ( http://arXiv.org/abs/cond-mat/0511641 , 40kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0601009 Date: Mon, 2 Jan 2006 11:07:50 GMT (21kb) Title: Notes on phase space quantization Authors: J. Kiukas, P. Lahti, K. Ylinen Comments: 21 pages, submitted to Journal of Mathematical Physics \\ We consider questions related to a quantization scheme in which a classical variable f:\Omega\to R on a phase space \Omega is associated with a semispectral measure E^f, such that the moment operators of E^f are required to be of the form \Gamma(f^k), with \Gamma a suitable mapping from the set of classical variables to the set of (not necessarily bounded) operators in some Hilbert space. In particular, we investigate the situation where the map \Gamma is implemented by the operator integral with respect to some fixed positive operator measure. The phase space \Omega is first taken to be an abstract measurable space, then a locally compact unimodular group, and finally R^2, where we determine explicitly the relevant operators \Gamma(f^k) for certain variables f, in the case where the quantization map \Gamma is implemented by a translation covariant positive operator measure. In addition, we consider the question under what conditions a positive operator measure is projection valued. \\ ( http://arXiv.org/abs/quant-ph/0601009 , 21kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601036 Date: Tue, 3 Jan 2006 07:24:34 GMT (22kb) Title: Electron-like and photon-like excitations in an ultracold Bose-Fermi atom mixture Authors: Yue Yu and S. T. Chui Comments: Supersede cond-mat/0510339 Subj-class: Other; Strongly Correlated Electrons \\ We show that the electron-like and photon-like excitations may exist in a three-dimensional Bose-Fermi Hubbard model describing ultracold Bose-Fermi atom mixtures in optical lattices. In a Mott insulating phase of the Bose atoms, these excitations are stabilized by an induced repulsive interaction between 'electrons' if the Fermi atoms are nearly half filling. We suggest to create 'external electric field' so that the electron-like excitation can be observed by measuring the linear density-density response of the 'electron' gas to the 'external field' in a time-of-flight experiment of the mixture. The Fermi surface of the 'electron' gas may also be expected to be observed in the time-of-flight. \\ ( http://arXiv.org/abs/cond-mat/0601036 , 22kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601044 Date: Tue, 3 Jan 2006 11:03:42 GMT (41kb) Title: Coherent control of population transfer between communicating defects Authors: Christoph Weiss Comments: 7 pages, 6 figures, to appear in Phys. Rev. B Subj-class: Other \\ Population transfer between two identical, communicating defects in a one-dimensional tight-binding lattice can be systematically controlled by external time-periodic forcing. Employing a force with slowly changing amplitude, the time it takes to transfer a particle from one defect to the other can be altered over several orders of magnitude. An analytical expression is derived which shows how the forcing effectively changes the energy splitting between the defect states, and numerical model calculations illustrate the possibility of coherent control of the transfer. \\ ( http://arXiv.org/abs/cond-mat/0601044 , 41kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601045 Date: Tue, 3 Jan 2006 12:14:03 GMT (200kb) Title: Fermionic atoms with tunable interactions in a 3D optical lattice Authors: Thilo St\"oferle, Henning Moritz, Christian Schori, Kenneth G\"unter, Michael K\"ohl, Tilman Esslinger Comments: 8 pages, 3 figures Subj-class: Strongly Correlated Electrons Journal-ref: Proceedings of the XVII International Conference on Laser Spectroscopy, World Scientific Publishing, 2005, p. 283 \\ We report on the realization of a quantum degenerate atomic Fermi gas in an optical lattice. Fermi surfaces of noninteracting fermions are studied in a three-dimensional lattice. Using a Feshbach resonance, we observe a coupling of the Bloch bands in the strongly interacting regime. \\ ( http://arXiv.org/abs/cond-mat/0601045 , 200kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601054 Date: Tue, 3 Jan 2006 18:26:53 GMT (1672kb) Title: Experimental realization of BCS-BEC crossover physics with a Fermi gas of atoms Authors: C. Regal and D. S. Jin Comments: Cindy Regal's Ph.D. thesis, 152 pages, 68 figures; a portion of this manuscript will appear in Vol. 43 of "Advances in Atomic, Molecular, and Optical Physics" Subj-class: Other \\ This thesis presents experiments probing physics in the crossover between Bose-Einstein condensation (BEC) and BCS superconductivity using an ultracold gas of atomic fermions. Scattering resonances in these ultracold gases (known as Feshbach resonances) provide the unique ability to tune the fermion-fermion interactions. The work presented here pioneered the use of fermionic Feshbach resonances as a highly controllable and tunable system ideal for studying the cusp of the BCS-BEC crossover problem. Here pairs of fermionic atoms have some properties of diatomic molecules and some properties of Cooper pairs. I present studies of a normal Fermi gas at a Feshbach resonance and the work required to cool the gas to temperatures where superfluidity in the crossover is predicted. These studies culminated in our observation of a phase transition at the cusp of the BCS-BEC crossover through condensation of fermionic atom pairs. I also discuss subsequent work that confirmed the crossover nature of the pairs in these condensates. \\ ( http://arXiv.org/abs/cond-mat/0601054 , 1672kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0508778 replaced with revised version Tue, 3 Jan 2006 00:07:30 GMT (441kb) Title: Observing the Profile of an Atom Laser Beam Authors: M. K\"ohl, Th. Busch, K. Molmer, T. W. H\"ansch, T. Esslinger Comments: 4 pages, 4 figures Subj-class: Other Journal-ref: Phys. Rev. A 72, 063618 (2005) DOI: 10.1103/PhysRevA.72.063618 \\ ( http://arXiv.org/abs/cond-mat/0508778 , 441kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0601012 Date: Tue, 3 Jan 2006 03:36:20 GMT (640kb) Title: Two-Mode Theory of BEC Interferometry Authors: B J Dalton Comments: Four figures (7 files) \\ A theory of BEC interferometry in an unsymmetrical double-well trap has been developed for small boson numbers, based on the two-mode approximation. The bosons are initially in the lowest mode of a single well trap, which is split into a double well and then recombined. Possible fragmentations into separate BEC states in each well during the splitting/recombination process are allowed for. The BEC is treated as a giant spin system, the fragmented states are eigenstates of S^2 and Sz. Self-consistent sets of equations for the amplitudes of the fragmented states and for the two single boson mode functions are obtained. The latter are coupled Gross-Pitaevskii equations. Interferometric effects may be measured via boson numbers in the first excited mode \\ ( http://arXiv.org/abs/quant-ph/0601012 , 640kb) ------------------------------------------------------------------------------ \\ Paper: cond-mat/0601045 replaced with revised version Wed, 4 Jan 2006 12:12:34 GMT (200kb) Title: Fermionic atoms with tunable interactions in a 3D optical lattice Authors: Thilo St\"oferle, Henning Moritz, Christian Schori, Kenneth G\"unter, Michael K\"ohl, Tilman Esslinger Comments: 8 pages, 3 figures; v2: updated references Subj-class: Strongly Correlated Electrons Journal-ref: Proceedings of the XVII International Conference on Laser Spectroscopy, World Scientific Publishing, 2005, p. 283 \\ ( http://arXiv.org/abs/cond-mat/0601045 , 200kb) ----------------------------------------------------------------------------- \\ Paper: quant-ph/0507227 replaced with revised version Wed, 4 Jan 2006 08:09:29 GMT (24kb) Title: Violating Bell Inequalities Maximally for Two $d$-Dimensional Systems Authors: Jing-Ling Chen, Chunfeng Wu, L. C. Kwek, C. H. Oh, Mo-Lin Ge Comments: 6 pages, 1 figure. Revised version \\ ( http://arXiv.org/abs/quant-ph/0507227 , 24kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0601029 Date: Wed, 4 Jan 2006 22:35:42 GMT (770kb) Title: Generating controllable atom-light entanglement with a Raman atom laser system Authors: S. A. Haine, M. K. Olsen, J. J. Hope Comments: 4 pages, 4 figures \\ We introduce a scheme for creating continuous variable entanglement between an atomic beam and an optical field, by using squeezed light to outcouple atoms from a BEC via a Raman transition. We model the full multimode dynamics of the atom laser beam and the squeezed optical field, and show that with appropriate two-photon detuning and two-photon Rabi frequency, the transmitted light is entangled in amplitude and phase with the outcoupled atom laser beam. The degree of entanglement is controllable via changes in the two-photon Rabi frequency of the outcoupling process. \\ ( http://arXiv.org/abs/quant-ph/0601029 , 770kb) ------------------------------------------------------------------------------ \\ Paper: quant-ph/0510019 replaced with revised version Thu, 5 Jan 2006 14:16:10 GMT (8kb) Title: Detection of N-particle entanglement with generalized Bell inequalities Authors: Wieslaw Laskowski, Marek Zukowski Comments: 5 pages, minor typos corrected, journal version Journal-ref: Phys. Rev. A 72, 062112 (2005) \\ ( http://arXiv.org/abs/quant-ph/0510019 , 8kb) ------------------------------------------------------------------------------ \\ Paper: physics/0508058 replaced with revised version Wed, 4 Jan 2006 05:30:40 GMT (104kb) Title: Collisions of ultracold atoms in dc electric fields Authors: R. V. Krems Subj-class: Atomic Physics; Chemical Physics \\ ( http://arXiv.org/abs/physics/0508058 , 104kb) ------------------------------------------------------------------------------Received on Fri Jan 13 2006 - 12:10:04 EST

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