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Constraining the generalized uncertainty principle with cold atoms (2016)

Dongfeng Gao and Mingsheng Zhan

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): Dongfeng Gao and Mingsheng Zhan Various theories of quantum gravity predict the existence of a minimum length scale, which implies the Planck-scale modifications of the Heisenberg uncertainty principle to a so-called generalized uncertainty principle (GUP). Previous studies of the GUP focused on its implications for high-energy ph… [Phys. Rev. A 94, 013607] Published Thu Jul 14, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Bosonic Josephson effect in the Fano-Anderson model (2016)

G. Engelhardt, G. Schaller, and T. Brandes

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): G. Engelhardt, G. Schaller, and T. Brandes We investigate the coherent dynamics of a noninteracting Bose-Einstein condensate in a system consisting of two bosonic reservoirs coupled via a spatially localized mode. We describe this system by a two-terminal Fano-Anderson model and investigate analytically the time evolution of observables such… [Phys. Rev. A 94, 013608] Published Thu Jul 14, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Beyond Gaussian pair fluctuation theory for strongly interacting Fermi gases (2016)

Brendan C. Mulkerin, Xia-Ji Liu, and Hui Hu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Brendan C. Mulkerin, Xia-Ji Liu, and Hui Hu Interacting Fermi systems in the strongly correlated regime play a fundamental role in many areas of physics and are of particular interest to the condensed matter community. Though weakly interacting fermions are understood, strongly correlated fermions are difficult to describe theoretically as th… [Phys. Rev. A 94, 013610] Published Mon Jul 18, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Finite-speed-of-light perturbation in atom gravimeters (2016)

Yu-Jie Tan, Cheng-Gang Shao, and Zhong-Kun Hu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): Yu-Jie Tan, Cheng-Gang Shao, and Zhong-Kun Hu The finite-speed-of-light (FSL) effect is a systematic error in atom gravimeters arising from the time delay due to the propagation of the light. It includes the frequency-chirp-independent part and the frequency-chirp-dependent part, which were not considered completely. The FSL effect in atom grav… [Phys. Rev. A 94, 013612] Published Wed Jul 20, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Engineering many-body dynamics with quantum light potentials and measurements (2016)

T. J. Elliott and I. B. Mekhov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-22

Beschreibung: Author(s): T. J. Elliott and I. B. Mekhov Interactions between many-body atomic systems in optical lattices and light in cavities induce long-range and correlated atomic dynamics beyond the standard Bose-Hubbard model, due to the global nature of the light modes. We characterize these processes, and show that uniting such phenomena with dyn… [Phys. Rev. A 94, 013614] Published Thu Jul 21, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Dynamics of Hubbard Hamiltonians with the multiconfigurational time-dependent Hartree method for indistinguishable particles (2016)

Axel U. J. Lode and Christoph Bruder

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-23

Beschreibung: Author(s): Axel U. J. Lode and Christoph Bruder We apply the multiconfigurational time-dependent Hartree method for indistinguishable particles (MCTDH-X) to systems of bosons or fermions in lattices described by Hubbard-type Hamiltonians with long-range or short-range interparticle interactions. The wave function is expanded in a variationally op… [Phys. Rev. A 94, 013616] Published Fri Jul 22, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Theory for Bose-Einstein condensation of light in nanofabricated semiconductor microcavities (2016)

A.-W. de Leeuw, E. C. I. van der Wurff, R. A. Duine, D. van Oosten, and H. T. C. Stoof

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-23

Beschreibung: Author(s): A.-W. de Leeuw, E. C. I. van der Wurff, R. A. Duine, D. van Oosten, and H. T. C. Stoof We construct a theory for Bose-Einstein condensation of light in nanofabricated semiconductor microcavities. We model the semiconductor by one conduction and one valence band which consist of electrons and holes that interact via a Coulomb interaction. Moreover, we incorporate screening effects by u… [Phys. Rev. A 94, 013615] Published Fri Jul 22, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Information and backaction due to phase-contrast-imaging measurements of cold atomic gases: Beyond Gaussian states (2016)

Ebubechukwu O. Ilo-Okeke and Tim Byrnes

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-26

Beschreibung: Author(s): Ebubechukwu O. Ilo-Okeke and Tim Byrnes We further examine a theory of phase contrast imaging (PCI) of cold atomic gases, first introduced by us in Phys. Rev. Lett. 112 , 233602 (2014) . We model the PCI measurement by directly calculating the entangled state between the light and the atoms due to the ac Stark shift, which induces a conditi… [Phys. Rev. A 94, 013617] Published Mon Jul 25, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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9

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Decoherence of an impurity in a one-dimensional fermionic bath with mass imbalance (2016)

A.-M. Visuri, J. J. Kinnunen, J. E. Baarsma, and P. Törmä

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-29

Beschreibung: Author(s): A.-M. Visuri, J. J. Kinnunen, J. E. Baarsma, and P. Törmä We study the transport, decoherence, and the dissipation of the kinetic energy of a mobile impurity interacting with a bath of free fermions in a one-dimensional lattice. Numerical simulations are made with the time-evolving block decimation method, starting from a state where the impurity and bath … [Phys. Rev. A 94, 013619] Published Thu Jul 28, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Generalized Hartree-Fock-Bogoliubov description of the Fröhlich polaron (2016)

Ben Kain and Hong Y. Ling

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-30

Beschreibung: Author(s): Ben Kain and Hong Y. Ling We adapt the generalized Hartree-Fock-Bogoliubov (HFB) method to an interacting many-phonon system free of impurities. The many-phonon system is obtained from applying the Lee-Low-Pine (LLP) transformation to the Fröhlich model which describes a mobile impurity coupled to noninteracting phonons. We … [Phys. Rev. A 94, 013621] Published Fri Jul 29, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Robustness of topologically protected edge states in quantum walk experiments with neutral atoms (2016)

Thorsten Groh, Stefan Brakhane, Wolfgang Alt, Dieter Meschede, Janos K. Asbóth, and Andrea Alberti

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-30

Beschreibung: Author(s): Thorsten Groh, Stefan Brakhane, Wolfgang Alt, Dieter Meschede, Janos K. Asbóth, and Andrea Alberti Robustness of topologically protected edge states in quantum walk experiments is studied with ultracold atoms in optical lattices; it is found that environment-induced decoherence may lead to exponential decay of the edge states into bulk states. [Phys. Rev. A 94, 013620] Published Fri Jul 29, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Effects of long-range hopping and interactions on quantum walks in ordered and disordered lattices (2016)

T. Chattaraj and R. V. Krems

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-02

Beschreibung: Author(s): T. Chattaraj and R. V. Krems We study the effects of long-range hopping and long-range interparticle interactions on the quantum walk of hard-core bosons in ideal and disordered one-dimensional lattices. We find that the range of hopping has a much more significant effect on the particle correlation dynamics than the range of i… [Phys. Rev. A 94, 023601] Published Mon Aug 01, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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13

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Quantum rotor theory of systems of spin-2 bosons (2016)

Matjaž Payrits and Ryan Barnett

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-03

Beschreibung: Author(s): Matjaž Payrits and Ryan Barnett We consider quantum phases of tightly confined spin-2 bosons in an external field under the presence of rotationally invariant interactions. Generalizing previous treatments, we show how this system can be mapped onto a quantum rotor model. Within the rotor framework, low-energy excitations about fr… [Phys. Rev. A 94, 023605] Published Tue Aug 02, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Effect of anisotropic exchange interactions and short-range phenomena on superfluidity in a homogeneous dipolar Fermi gas (2016)

I. Corro and A. M. Martin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-03

Beschreibung: Author(s): I. Corro and A. M. Martin We develop a simple numerical method that allows us to calculate the BCS superfluid transition temperature T c precisely for any interaction potential. We apply it to a polarized, ultracold Fermi gas with long-range, anisotropic, dipolar interactions and include the effects of anisotropic exchange in… [Phys. Rev. A 94, 023603] Published Tue Aug 02, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Momentum distributions and numerical methods for strongly interacting one-dimensional spinor gases (2016)

F. Deuretzbacher, D. Becker, and L. Santos

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-05

Beschreibung: Author(s): F. Deuretzbacher, D. Becker, and L. Santos One-dimensional spinor gases with strong δ interaction fermionize and form a spin chain. The spatial degrees of freedom of this atom chain can be described by a mapping to spinless noninteracting fermions and the spin degrees of freedom are described by a spin-chain model with nearest-neighbor inter… [Phys. Rev. A 94, 023606] Published Thu Aug 04, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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16

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Matter-wave grating distinguishing conservative and dissipative interactions (2016)

Robert P. Cameron, Jörg B. Götte, Stephen M. Barnett, and J. P. Cotter

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): Robert P. Cameron, Jörg B. Götte, Stephen M. Barnett, and J. P. Cotter We propose an optical grating for matter waves that separates molecules depending on whether their interaction with the light is conservative or dissipative. Potential applications include fundamental tests of quantum mechanics, measurement of molecular properties, and the ability to selectively pre… [Phys. Rev. A 94, 013604] Published Mon Jul 11, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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17

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Phase separation and dynamics of two-component Bose-Einstein condensates (2016)

Kean Loon Lee, Nils B. Jørgensen, I-Kang Liu, Lars Wacker, Jan J. Arlt, and Nick P. Proukakis

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): Kean Loon Lee, Nils B. Jørgensen, I-Kang Liu, Lars Wacker, Jan J. Arlt, and Nick P. Proukakis The miscibility of two interacting quantum systems is an important testing ground for the understanding of complex quantum systems. Two-component Bose-Einstein condensates enable the investigation of this scenario in a particularly well controlled setting. In a homogeneous system, the transition bet… [Phys. Rev. A 94, 013602] Published Mon Jul 11, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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18

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Critical points of the anyon-Hubbard model (2016)

J. Arcila-Forero, R. Franco, and J. Silva-Valencia

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): J. Arcila-Forero, R. Franco, and J. Silva-Valencia Anyons are particles with fractional statistics that exhibit a nontrivial change in the wave function under an exchange of particles. Anyons can be considered to be a general category of particles that interpolate between fermions and bosons. We determined the position of the critical points of the … [Phys. Rev. A 94, 013611] Published Tue Jul 19, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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19

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Dynamics and thermalization of a Bose-Einstein condensate in a Sinai-oscillator trap (2016)

Leonardo Ermann, Eduardo Vergini, and Dima L. Shepelyansky

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-26

Beschreibung: Author(s): Leonardo Ermann, Eduardo Vergini, and Dima L. Shepelyansky We study numerically the evolution of Bose-Einstein condensate in the Sinai-oscillator trap described by the Gross-Pitaevskii equation in two dimensions. In the absence of interactions, this trap mimics the properties of Sinai billiards where the classical dynamics is chaotic and the quantum evoluti… [Phys. Rev. A 94, 013618] Published Mon Jul 25, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Theory of the vortex-clustering transition in a confined two-dimensional quantum fluid (2016)

Xiaoquan Yu, Thomas P. Billam, Jun Nian, Matthew T. Reeves, and Ashton S. Bradley

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-02

Beschreibung: Author(s): Xiaoquan Yu, Thomas P. Billam, Jun Nian, Matthew T. Reeves, and Ashton S. Bradley Clustering of like-sign vortices in a planar bounded domain is known to occur at negative temperature, a phenomenon that Onsager demonstrated to be a consequence of bounded phase space. In a confined superfluid, quantized vortices can support such an ordered phase, provided they evolve as an almost … [Phys. Rev. A 94, 023602] Published Mon Aug 01, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Ballistic quench-induced correlation waves in ultracold gases (2016)

John P. Corson and John L. Bohn

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-03

Beschreibung: Author(s): John P. Corson and John L. Bohn We investigate the wave-packet dynamics of a pair of particles that undergoes a rapid change of scattering length. The short-range interactions are modeled in the zero-range limit, where the quench is accomplished by switching the boundary condition of the wave function at vanishing particle separat… [Phys. Rev. A 94, 023604] Published Tue Aug 02, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Disappearance of quasiparticles in a Bose lattice gas (2016)

David Chen, Carolyn Meldgin, Philip Russ, Brian De; Marco, and Erich Mueller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-04

Beschreibung: Author(s): David Chen, Carolyn Meldgin, Philip Russ, Brian DeMarco, and Erich Mueller We use a momentum-space hole-burning technique implemented via stimulated Raman transitions to measure the momentum relaxation time for a gas of bosonic atoms trapped in an optical lattice. By changing the lattice potential depth, we observe a smooth crossover between relaxation times larger and sma… [Phys. Rev. A 94, 021601(R)] Published Wed Aug 03, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Sudden-quench dynamics of Bardeen-Cooper-Schrieffer states in deep optical lattices (2016)

Marlon Nuske, L. Mathey, and Eite Tiesinga

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-06

Beschreibung: Author(s): Marlon Nuske, L. Mathey, and Eite Tiesinga We determine the exact dynamics of an initial Bardeen-Cooper-Schrieffer (BCS) state of ultracold atoms in a deep hexagonal optical lattice. The dynamical evolution is triggered by a quench of the lattice potential such that the interaction strength U f is much larger than the hopping amplitude J f . Th… [Phys. Rev. A 94, 023607] Published Fri Aug 05, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Hidden-symmetry-protected quantum pseudo–spin Hall effect in optical lattices (2016)

Jing-Min Hou and Wei Chen

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-21

Beschreibung: Author(s): Jing-Min Hou and Wei Chen We propose a scheme to realize a Z 2 topological insulator in a square optical lattice. Different from the conventional topological insulator protected by the time-reversal symmetry, here the optical lattice possesses a hidden symmetry, which is responsible for the present Z 2 topological order. With … [Phys. Rev. A 93, 063626] Published Mon Jun 20, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Properties of the single-site reduced density matrix in the Bose-Bose resonance model in the ground state and in quantum quenches (2016)

F. Dorfner and F. Heidrich-Meisner

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-21

Beschreibung: Author(s): F. Dorfner and F. Heidrich-Meisner We study properties of the single-site reduced density matrix in the Bose-Bose resonance model as a function of system parameters. This model describes a single-component Bose gas with a resonant coupling to a diatomic molecular state, here defined on a lattice. A main goal is to demonstrate that th… [Phys. Rev. A 93, 063624] Published Mon Jun 20, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Spin-1 quantum walks (2016)

Daichi Morita, Toshihiro Kubo, Yasuhiro Tokura, and Makoto Yamashita

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-21

Beschreibung: Author(s): Daichi Morita, Toshihiro Kubo, Yasuhiro Tokura, and Makoto Yamashita We study the quantum walks of two interacting spin-1 bosons. We derive an exact solution for the time-dependent wave function, which describes the two-particle dynamics governed by the one-dimensional spin-1 Bose-Hubbard model. We show that propagation dynamics in real space and mixing dynamics in s… [Phys. Rev. A 93, 063625] Published Mon Jun 20, 2016

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Ground-state properties of hard-core anyons in a harmonic potential (2016)

Yajiang Hao

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-22

Beschreibung: Author(s): Yajiang Hao Using an anyon-fermion mapping method, we investigate the ground-state properties of hard-core anyons confined in a one-dimensional harmonic trap. The concise analytical formula of the reduced one-body density matrix is obtained. Based on this formula, we evaluated the momentum distribution, the nat… [Phys. Rev. A 93, 063627] Published Tue Jun 21, 2016

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Bragg interferometer for gravity gradient measurements (2016)

G. D'Amico, F. Borselli, L. Cacciapuoti, M. Prevedelli, G. Rosi, F. Sorrentino, and G. M. Tino

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-24

Beschreibung: Author(s): G. D'Amico, F. Borselli, L. Cacciapuoti, M. Prevedelli, G. Rosi, F. Sorrentino, and G. M. Tino We report on the characterization of a dual cloud atom interferometer for gravity gradient measurements using third-order Bragg diffraction as atom optical elements. We study the dependence of the contrast and the gradiometer phase angle against the relevant experimental parameters and characterize … [Phys. Rev. A 93, 063628] Published Wed Jun 22, 2016

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Fermi polaron in a one-dimensional quasiperiodic optical lattice: The simplest many-body localization challenge (2016)

Hui Hu, An-Bang Wang, Su Yi, and Xia-Ji Liu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-05-04

Beschreibung: Author(s): Hui Hu, An-Bang Wang, Su Yi, and Xia-Ji Liu We theoretically investigate the behavior of a moving impurity immersed in a sea of fermionic atoms that are confined in a quasiperiodic (bichromatic) optical lattice within a standard variational approach. We consider both repulsive and attractive contact interactions for such a simple many-body lo… [Phys. Rev. A 93, 053601] Published Mon May 02, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Spin Hall effect in a spinor dipolar Bose-Einstein condensate (2016)

T. Oshima and Y. Kawaguchi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-05-06

Beschreibung: Author(s): T. Oshima and Y. Kawaguchi We theoretically show that the spin Hall effect arises in a Bose-Einstein condensate (BEC) of neutral atoms interacting via the magnetic dipole-dipole interactions (MDDIs). Since the MDDI couples the total spin angular momentum and the relative orbital angular momentum of two colliding atoms, it wor… [Phys. Rev. A 93, 053605] Published Thu May 05, 2016

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Sagnac interferometry with coherent vortex superposition states in exciton-polariton condensates (2016)

Frederick Ira Moxley, III, Jonathan P. Dowling, Weizhong Dai, and Tim Byrnes

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-05-05

Beschreibung: Author(s): Frederick Ira Moxley, III, Jonathan P. Dowling, Weizhong Dai, and Tim Byrnes We investigate prospects of using counter-rotating vortex superposition states in nonequilibrium exciton-polariton Bose-Einstein condensates for the purposes of Sagnac interferometry. We first investigate the stability of vortex-antivortex superposition states, and show that they survive at steady s… [Phys. Rev. A 93, 053603] Published Wed May 04, 2016

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Numerical study of the unitary Fermi gas across the superfluid transition (2016)

Olga Goulko and Matthew Wingate

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-05-05

Beschreibung: Author(s): Olga Goulko and Matthew Wingate We present results from Monte Carlo calculations investigating the properties of the homogeneous, spin-balanced unitary Fermi gas in three dimensions. The temperature is varied across the superfluid transition allowing us to determine the temperature dependence of the chemical potential, the energy … [Phys. Rev. A 93, 053604] Published Wed May 04, 2016

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Realizing exactly solvable SU(N) magnets with thermal atoms (2016)

Michael E. Beverland, Gorjan Alagic, Michael J. Martin, Andrew P. Koller, Ana M. Rey, and Alexey V. Gorshkov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-05-07

Beschreibung: Author(s): Michael E. Beverland, Gorjan Alagic, Michael J. Martin, Andrew P. Koller, Ana M. Rey, and Alexey V. Gorshkov We show that n thermal fermionic alkaline-earth-metal atoms in a flat-bottom trap allow one to robustly implement a spin model displaying two symmetries: the S n symmetry that permutes atoms occupying different vibrational levels of the trap and the SU ( N ) symmetry associated with N nuclear spin state… [Phys. Rev. A 93, 051601(R)] Published Fri May 06, 2016

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Coherence of interacting bosons in optical lattices in synthetic magnetic fields with a large number of subbands (2016)

B. Grygiel, K. Patucha, and T. A. Zaleski

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-05-10

Beschreibung: Author(s): B. Grygiel, K. Patucha, and T. A. Zaleski We study the behavior of interacting ultracold bosons in optical lattices in synthetic magnetic fields with wide range of in-cell fluxes α = p / q . The problem is similar to the one of an electron moving in a tight-binding scheme in the magnetic field and becomes difficult to tackle for a growing number… [Phys. Rev. A 93, 053607] Published Mon May 09, 2016

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Simulating frustrated magnetism with spinor Bose gases (2016)

T. Debelhoir and N. Dupuis

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-05-28

Beschreibung: Author(s): T. Debelhoir and N. Dupuis Although there is a broad consensus on the fact that critical behavior in stacked triangular Heisenberg antiferromagnets—an example of frustrated magnets with competing interactions—is described by a Landau-Ginzburg-Wilson Hamiltonian with O ( 3 ) × O ( 2 ) symmetry, the nature of the phase transition in th… [Phys. Rev. A 93, 051603(R)] Published Thu May 26, 2016

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Prethermalization and thermalization of a quenched interacting Luttinger liquid (2016)

Michael Buchhold, Markus Heyl, and Sebastian Diehl

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-09

Beschreibung: Author(s): Michael Buchhold, Markus Heyl, and Sebastian Diehl We study the relaxation dynamics of interacting one-dimensional fermions with band curvature after a weak quench in the interaction parameter at zero temperature. Our model lies within the class of interacting Luttinger liquids, where the harmonic Luttinger theory is extended by a weak-integrability… [Phys. Rev. A 94, 013601] Published Fri Jul 08, 2016

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Spin-orbit states of neutron wave packets (2016)

Joachim Nsofini, Dusan Sarenac, Christopher J. Wood, David G. Cory, Muhammad Arif, Charles W. Clark, Michael G. Huber, and Dmitry A. Pushin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): Joachim Nsofini, Dusan Sarenac, Christopher J. Wood, David G. Cory, Muhammad Arif, Charles W. Clark, Michael G. Huber, and Dmitry A. Pushin We propose a method to prepare an entangled spin-orbit state between the spin and the orbital angular momenta of a neutron wave packet. This spin-orbit state is created by passing neutrons through the center of a quadrupole magnetic field, which provides a coupling between the spin and orbital degre… [Phys. Rev. A 94, 013605] Published Wed Jul 13, 2016

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Realization and detection of Weyl semimetals and the chiral anomaly in cold atomic systems (2016)

Wen-Yu He, Shizhong Zhang, and K. T. Law

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): Wen-Yu He, Shizhong Zhang, and K. T. Law In this work, we describe a method to realize a three-dimensional Weyl semimetal by coupling multilayers of a honeycomb optical lattice in the presence of a pair of Raman lasers. The Raman lasers render each isolated honeycomb layer a Chern insulator. With finite interlayer coupling, the bulk gap of… [Phys. Rev. A 94, 013606] Published Wed Jul 13, 2016

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Onset of transverse instabilities of confined dark solitons (2016)

M. A. Hoefer and B. Ilan

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-16

Beschreibung: Author(s): M. A. Hoefer and B. Ilan We investigate propagating dark soliton solutions of the two-dimensional defocusing nonlinear Schrödinger or Gross-Pitaevskii (NLS-GP) equation that are transversely confined to propagate in an infinitely long channel. Families of single, vortex, and multilobed solitons are computed using a spectral… [Phys. Rev. A 94, 013609] Published Fri Jul 15, 2016

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Twisted superfluid phase in the extended one-dimensional Bose-Hubbard model (2016)

Dirk-Sören Lühmann

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Dirk-Sören Lühmann In one-dimensional systems a twisted superfluid phase is found which is induced by a spontaneous breaking of the time-reversal symmetry. Using the density-matrix renormalization group allows us to show that the excitation energy gap closes exponentially causing a quasidegenerate ground state. The tw… [Phys. Rev. A 94, 011603(R)] Published Mon Jul 18, 2016

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μ-symmetry breaking: An algebraic approach to finding mean fields of quantum many-body systems (2016)

Sho Higashikawa and Masahito Ueda

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-22

Beschreibung: Author(s): Sho Higashikawa and Masahito Ueda One of the most fundamental problems in quantum many-body systems is the identification of a mean field in spontaneous symmetry breaking which is usually made in a heuristic manner. We propose a systematic method of finding a mean field based on the Lie algebra and the dynamical symmetry by introduc… [Phys. Rev. A 94, 013613] Published Thu Jul 21, 2016

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Two-band superfluidity and intrinsic Josephson effect in alkaline-earth-metal Fermi gases across an orbital Feshbach resonance (2016)

M. Iskin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-26

Beschreibung: Author(s): M. Iskin We first show that the many-body Hamiltonian governing the physical properties of an alkaline-earth Yb 173 Fermi gas across the recently realized orbital Feshbach resonance is exactly analogous to that of two-band s -wave superconductors with contact interactions; i.e., even though the free-particle b… [Phys. Rev. A 94, 011604(R)] Published Mon Jul 25, 2016

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Topological phases via engineered orbital hybridization in noncentrosymmetric optical lattices (2016)

Bo Liu, Xiaopeng Li, and W. Vincent Liu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-25

Beschreibung: Author(s): Bo Liu, Xiaopeng Li, and W. Vincent Liu We propose a symmetry-based method of using noncentrosymmetric optical lattices to systematically control topological nontrivial orbital hybridization. A crucial difference from the previous studies is the role of inversion symmetry breaking, which is applied to induce an exotic orbital-changing hop… [Phys. Rev. A 93, 033643] Published Wed Mar 23, 2016

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Magnetic phase transition in coherently coupled Bose gases in optical lattices (2016)

L. Barbiero, M. Abad, and A. Recati

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-26

Beschreibung: Author(s): L. Barbiero, M. Abad, and A. Recati We describe the ground state of a gas of bosonic atoms with two coherently coupled internal levels in a deep optical lattice in a one-dimensional geometry. In the single-band approximation this system is described by a Bose-Hubbard Hamiltonian. The system has a superfluid and a Mott insulating phase… [Phys. Rev. A 93, 033645] Published Fri Mar 25, 2016

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Hamiltonian dynamics of two same-sign point vortices (2016)

Anderson V. Murray, Andrew J. Groszek, Pekko Kuopanportti, and Tapio Simula

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-30

Beschreibung: Author(s): Anderson V. Murray, Andrew J. Groszek, Pekko Kuopanportti, and Tapio Simula We have studied numerically the Hamiltonian dynamics of two same-sign point vortices in an effectively two-dimensional, harmonically trapped Bose-Einstein condensate. We have found in the phase space of the system an impenetrable wall that divides the dynamics into two distinct and exhaustive types.… [Phys. Rev. A 93, 033649] Published Tue Mar 29, 2016

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Phase transitions and elementary excitations in spin-1 Bose gases with Raman-induced spin-orbit coupling (2016)

Zeng-Qiang Yu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-30

Beschreibung: Author(s): Zeng-Qiang Yu We study the ground-state phase diagram and the quantum phase transitions in spin-1 Bose gases with Raman-induced spin-orbit coupling. In addition to the Bose-Einstein condensates with uniform density, three types of stripe condensation phases that simultaneously break the U(1) symmetry and the tran… [Phys. Rev. A 93, 033648] Published Tue Mar 29, 2016

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Effective p-wave interaction and topological superfluids in s-wave quantum gases (2016)

Bin Wang, Zhen Zheng, Han Pu, Xubo Zou, and Guangcan Guo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-30

Beschreibung: Author(s): Bin Wang, Zhen Zheng, Han Pu, Xubo Zou, and Guangcan Guo p -wave interaction in cold atoms may give rise to exotic topological superfluids. However, the realization of p -wave interaction in a cold atom system is experimentally challenging. Here we propose a simple scheme to synthesize effective p -wave interaction in conventional s -wave interacting quantum … [Phys. Rev. A 93, 031602(R)] Published Tue Mar 29, 2016

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Finite-temperature effects on interacting bosonic one-dimensional systems in disordered lattices (2016)

Lorenzo Gori, Thomas Barthel, Avinash Kumar, Eleonora Lucioni, Luca Tanzi, Massimo Inguscio, Giovanni Modugno, Thierry Giamarchi, Chiara D'Errico, and Guillaume Roux

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-30

Beschreibung: Author(s): Lorenzo Gori, Thomas Barthel, Avinash Kumar, Eleonora Lucioni, Luca Tanzi, Massimo Inguscio, Giovanni Modugno, Thierry Giamarchi, Chiara D'Errico, and Guillaume Roux We analyze the finite-temperature effects on the phase diagram describing the insulating properties of interacting one-dimensional bosons in a quasiperiodic lattice. We examine thermal effects by comparing experimental results to exact diagonalization for small-sized systems and to density-matrix re… [Phys. Rev. A 93, 033650] Published Tue Mar 29, 2016

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Itinerant chiral ferromagnetism in a trapped Rashba spin-orbit-coupled Fermi gas (2016)

Shang-Shun Zhang, Wu-Ming Liu, and Han Pu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-05

Beschreibung: Author(s): Shang-Shun Zhang, Wu-Ming Liu, and Han Pu We consider a repulsive two-component Fermi gas confined in a two-dimensional isotropic harmonic potential and subject to a large Rashba spin-orbit coupling. The single-particle dispersion can be tailored by the spin-orbit-coupling term, which provides an opportunity to study itinerant ferromagnetis… [Phys. Rev. A 93, 043602] Published Mon Apr 04, 2016

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Off-resonant many-body quantum carpets in strongly tilted optical lattices (2016)

Manuel H. Muñoz-Arias, Javier Madroñero, and Carlos A. Parra-Murillo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-05

Beschreibung: Author(s): Manuel H. Muñoz-Arias, Javier Madroñero, and Carlos A. Parra-Murillo A unit filling Bose-Hubbard Hamiltonian embedded in a strong Stark field is studied in the off-resonant regime inhibiting single- and many-particle first-order tunneling resonances. We investigate the occurrence of coherent dipole wavelike propagation along an optical lattice by means of an effectiv… [Phys. Rev. A 93, 043603] Published Mon Apr 04, 2016

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Observing the effect of wave-front aberrations in an atom interferometer by modulating the diameter of Raman beams (2016)

Min-kang Zhou, Qin Luo, Le-le Chen, Xiao-chun Duan, and Zhong-kun Hu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-12

Beschreibung: Author(s): Min-kang Zhou, Qin Luo, Le-le Chen, Xiao-chun Duan, and Zhong-kun Hu The effect of wavefront aberrations is one of the most important systematic errors in atom interferometers and limits the accuracy of precision atom gravimeters. A detailed theoretical analysis of this effect is presented, and a theoretical method for observing this effect is proposed and demonstrat… [Phys. Rev. A 93, 043610] Published Mon Apr 11, 2016

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Nondestructive probing of means, variances, and correlations of ultracold-atomic-system densities via qubit impurities (2016)

T. J. Elliott and T. H. Johnson

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-12

Beschreibung: Author(s): T. J. Elliott and T. H. Johnson A method of probing densities of ultracold bosons confined in a one-dimensional lattice is proposed by employing measurements on the dephasing of qubits formed from impurity atoms, which may be further applied to detecting phase transitions in the Bose-Hubbard model. [Phys. Rev. A 93, 043612] Published Mon Apr 11, 2016

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Quantum simulation of a topological Mott insulator with Rydberg atoms in a Lieb lattice (2016)

A. Dauphin, M. Müller, and M. A. Martin-Delgado

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-12

Beschreibung: Author(s): A. Dauphin, M. Müller, and M. A. Martin-Delgado We propose a realistic scheme to quantum simulate the so-far experimentally unobserved topological Mott insulator phase—an interaction-driven topological insulator—using cold atoms in an optical Lieb lattice. To this end, we study a system of spinless fermions in a Lieb lattice, exhibiting repulsive… [Phys. Rev. A 93, 043611] Published Mon Apr 11, 2016

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Stability of a Bose-Einstein condensate in a driven optical lattice: Crossover between weak and tight transverse confinement (2016)

Sayan Choudhury and Erich J. Mueller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-01

Beschreibung: Author(s): Sayan Choudhury and Erich J. Mueller We explore the effect of transverse confinement on the stability of a Bose-Einstein condensate loaded in a shaken one-dimensional or two-dimensional square lattice. We calculate the decay rate from two-particle collisions. We predict that if the transverse confinement exceeds a critical value, then,… [Phys. Rev. A 92, 063639] Published Thu Dec 31, 2015

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Ground-state phase diagram of a spin-orbit-coupled bosonic superfluid in an optical lattice (2016)

Zhu Chen and Zhaoxin Liang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-06

Beschreibung: Author(s): Zhu Chen and Zhaoxin Liang In recent experiments, spin-orbit-coupled (SOC) bosonic gases in an optical lattice have been successfully prepared into any Bloch band [Hamner et al. , Phys. Rev. Lett. 114 , 070401 (2015)] , which promises a viable contender in the competitive field of simulating gauge-related phenomena. However, th… [Phys. Rev. A 93, 013601] Published Tue Jan 05, 2016

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Dimensional crossover in a Fermi gas and a cross-dimensional Tomonaga-Luttinger model (2016)

Guillaume Lang, Frank Hekking, and Anna Minguzzi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-08

Beschreibung: Author(s): Guillaume Lang, Frank Hekking, and Anna Minguzzi We describe the dimensional crossover in a noninteracting Fermi gas in an anisotropic trap, obtained by populating various transverse modes of the trap. We study the dynamical structure factor and drag force. Starting from a dimension d , the ( d + 1 ) -dimensional case is obtained to a good approximation… [Phys. Rev. A 93, 013603] Published Thu Jan 07, 2016

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Quantum Hall physics with cold atoms in cylindrical optical lattices (2016)

Mateusz Łącki, Hannes Pichler, Antoine Sterdyniak, Andreas Lyras, Vassilis E. Lembessis, Omar Al-Dossary, Jan Carl Budich, and Peter Zoller

American Physical Society (APS)

In: Physical Review A

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Beschreibung: Author(s): Mateusz Łącki, Hannes Pichler, Antoine Sterdyniak, Andreas Lyras, Vassilis E. Lembessis, Omar Al-Dossary, Jan Carl Budich, and Peter Zoller We propose and study various realizations of a Hofstadter-Hubbard model on a cylinder geometry with fermionic cold atoms in optical lattices. The cylindrical optical lattice is created by copropagating Laguerre-Gauss beams, i.e., light beams carrying orbital angular momentum. By strong focusing of t… [Phys. Rev. A 93, 013604] Published Thu Jan 07, 2016

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Superballistic center-of-mass motion in one-dimensional attractive Bose gases: Decoherence-induced Gaussian random walks in velocity space (2016)

Christoph Weiss, Simon L. Cornish, Simon A. Gardiner, and Heinz-Peter Breuer

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-09

Beschreibung: Author(s): Christoph Weiss, Simon L. Cornish, Simon A. Gardiner, and Heinz-Peter Breuer We show that the spreading of the center-of-mass density of ultracold attractively interacting bosons can become superballistic in the presence of decoherence, via one-, two-, and/or three-body losses. In the limit of weak decoherence, we analytically solve the numerical model introduced in [ Phys.… [Phys. Rev. A 93, 013605] Published Fri Jan 08, 2016

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Limits to the symmetry of a Mach-Zehnder-type atom interferometer (2016)

P. Gillot, B. Cheng, S. Merlet, and F. Pereira Dos Santos

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-13

Beschreibung: Author(s): P. Gillot, B. Cheng, S. Merlet, and F. Pereira Dos Santos Owing to the use of a symmetrization π pulse at the middle of their laser sequences, Mach-Zehnder-type atom interferometers are insensitive to clocks shifts and Doppler shifts, if constant, but to changes in these quantities, which makes them accurate and sensitive inertial-force sensors. However, v... [Phys. Rev. A 93, 013609] Published Tue Jan 12, 2016

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Measuring the disorder of vortex lattices in a Bose-Einstein condensate (2016)

A. Rakonjac, A. L. Marchant, T. P. Billam, J. L. Helm, M. M. H. Yu, S. A. Gardiner, and S. L. Cornish

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-13

Beschreibung: Author(s): A. Rakonjac, A. L. Marchant, T. P. Billam, J. L. Helm, M. M. H. Yu, S. A. Gardiner, and S. L. Cornish We report observations of the formation and subsequent decay of a vortex lattice in a Bose-Einstein condensate confined in a hybrid optical-magnetic trap. Vortices are induced by rotating the anharmonic magnetic potential that provides confinement in the horizontal plane. We present simple numerical... [Phys. Rev. A 93, 013607] Published Mon Jan 11, 2016

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Breakdown of Anderson localization in the transport of Bose-Einstein condensates through one-dimensional disordered potentials (2016)

Julien Dujardin, Thomas Engl, and Peter Schlagheck

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-14

Beschreibung: Author(s): Julien Dujardin, Thomas Engl, and Peter Schlagheck We study the transport of an interacting Bose–Einstein condensate through a 1D correlated disorder potential. We use for this purpose the truncated Wigner method, which is, as we show, corresponding to the diagonal approximation of a semiclassical van Vleck–Gutzwiller representation of this many-bod… [Phys. Rev. A 93, 013612] Published Wed Jan 13, 2016

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Geometrically induced complex tunnelings for ultracold atoms carrying orbital angular momentum (2016)

J. Polo, J. Mompart, and V. Ahufinger

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-08

Beschreibung: Author(s): J. Polo, J. Mompart, and V. Ahufinger We investigate the dynamics of angular momentum states for a single ultracold atom trapped in two-dimensional systems of sided coupled ring potentials. The symmetries of the system show that tunneling amplitudes between different ring states with variation of the winding number are complex. In parti… [Phys. Rev. A 93, 033613] Published Mon Mar 07, 2016

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Spin and charge modulations in a single-hole-doped Hubbard ladder: Verification with optical lattice experiments (2016)

Zheng Zhu, Zheng-Yu Weng, and Tin-Lun Ho

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-08

Beschreibung: Author(s): Zheng Zhu, Zheng-Yu Weng, and Tin-Lun Ho We show that pronounced modulations in spin and charge densities can be induced by the insertion of a single hole in an otherwise half-filled two-leg Hubbard ladder. Accompanied with these modulations is a loosely bound structure of the doped charge with a spin-1/2, in contrast to the tightly bound … [Phys. Rev. A 93, 033614] Published Mon Mar 07, 2016

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Rotating a Rashba-coupled Fermi gas in two dimensions (2016)

E. Doko, A. L. Subaşı, and M. Iskin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-23

Beschreibung: Author(s): E. Doko, A. L. Subaşı, and M. Iskin We analyze the interplay of adiabatic rotation and Rashba spin-orbit coupling on the BCS-BEC evolution of a harmonically trapped Fermi gas in two dimensions under the assumption that vortices are not excited. First, by taking the trapping potential into account via both the semiclassical and exact q… [Phys. Rev. A 93, 033640] Published Tue Mar 22, 2016

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Violation of the Wiedemann-Franz law for one-dimensional ultracold atomic gases (2016)

Michele Filippone, Frank Hekking, and Anna Minguzzi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-06

Beschreibung: Author(s): Michele Filippone, Frank Hekking, and Anna Minguzzi We study energy and particle transport for one-dimensional strongly interacting bosons through a ballistic single channel connecting two atomic reservoirs. We show the emergence of particle- and energy-current separation, leading to the violation of the Wiedemann-Franz law. As a consequence, we pred… [Phys. Rev. A 93, 011602(R)] Published Tue Jan 05, 2016

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Strong-coupling corrections to spin susceptibility in the BCS-BEC-crossover regime of a superfluid Fermi gas (2016)

Hiroyuki Tajima, Ryo Hanai, and Yoji Ohashi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-13

Beschreibung: Author(s): Hiroyuki Tajima, Ryo Hanai, and Yoji Ohashi We theoretically investigate the uniform spin susceptibility χ in the superfluid phase of an ultracold Fermi gas in the region of the Bardeen-Cooper-Schrieffer–Bose-Einstein-condensate (BCS-BEC) crossover. In our previous paper [H. Tajima et al. , Phys. Rev. A 89 , 033617 (2014) ], including pairing f... [Phys. Rev. A 93, 013610] Published Tue Jan 12, 2016

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Spin squeezing of a dipolar Bose gas in a double-well potential (2016)

Qing-Shou Tan, Hai-Yan Lu, and Su Yi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-13

Beschreibung: Author(s): Qing-Shou Tan, Hai-Yan Lu, and Su Yi The spin-squeezing dynamics of a quasi-one-dimensional dipolar Bose gas trapped in a double-well potential is studied by employing the method of the multiconfigurational time-dependent Hartree for bosons. We find that optimal squeezing generated by the dipolar interaction can be improved over the on... [Phys. Rev. A 93, 013606] Published Mon Jan 11, 2016

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Evolution of the Higgs mode in a fermion superfluid with tunable interactions (2016)

Boyang Liu, Hui Zhai, and Shizhong Zhang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-25

Beschreibung: Author(s): Boyang Liu, Hui Zhai, and Shizhong Zhang In this work we present a coherent picture for the evolution of Higgs mode in neutral s -wave fermion superfluids. As the strength of attractive interaction between fermions increases from the BCS to the Bose-Einstein condensate (BEC) regime we find that the Higgs mode in the fermionic superfluids is… [Phys. Rev. A 93, 033641] Published Wed Mar 23, 2016

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Properties of a dipolar condensate with three-body interactions (2016)

P. B. Blakie

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-25

Beschreibung: Author(s): P. B. Blakie We obtain the phase diagram for a harmonically trapped dilute dipolar condensate with a short-ranged conservative three-body interaction. We show that this system supports two distinct fluid states: a usual condensate state and a self-cohering droplet state. We develop a simple model to quantify the… [Phys. Rev. A 93, 033644] Published Wed Mar 23, 2016

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Supersymmetric waves in Bose-Fermi mixtures (2016)

Barry Bradlyn and Andrey Gromov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-03-25

Beschreibung: Author(s): Barry Bradlyn and Andrey Gromov Interacting Bose-Fermi mixtures possess a fermionic (super)symmetry when bosons and fermions in the mixture have equal masses, and when the interaction strengths are appropriately tuned. This symmetry is spontaneously broken in the ground state of the mixture, leading to a novel Goldstone mode with … [Phys. Rev. A 93, 033642] Published Wed Mar 23, 2016

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Topologically nontrivial Hofstadter bands on the kagome lattice (2016)

Christoph H. Redder and Götz S. Uhrig

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-01

Beschreibung: Author(s): Christoph H. Redder and Götz S. Uhrig We investigate how the multiple bands of fermions on a crystal lattice evolve if a magnetic field is added which does not increase the number of bands. The kagome lattice is studied as generic example for a lattice with loops of three bonds. Finite Chern numbers occur as a nontrivial topological pro… [Phys. Rev. A 93, 033654] Published Thu Mar 31, 2016

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Kondo effect in alkaline-earth-metal atomic gases with confinement-induced resonances (2016)

Ren Zhang, Deping Zhang, Yanting Cheng, Wei Chen, Peng Zhang, and Hui Zhai

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-02

Beschreibung: Author(s): Ren Zhang, Deping Zhang, Yanting Cheng, Wei Chen, Peng Zhang, and Hui Zhai Alkaline-earth-metal atoms have a long-lived electronic excited state, and when atoms in this excited state are localized in the Fermi sea of ground-state atoms by an external potential, they serve as magnetic impurities, due to the spin-exchange interaction between the excited- and the ground-state… [Phys. Rev. A 93, 043601] Published Fri Apr 01, 2016

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Long-lived universal resonant Bose gases (2016)

Shao-Jian Jiang, Jeff Maki, and Fei Zhou

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-08

Beschreibung: Author(s): Shao-Jian Jiang, Jeff Maki, and Fei Zhou Quantum simulations based on near-resonance Bose gases are limited by their short lifetimes due to severe atom losses. In addition to this, the recently predicted thermodynamical instability adds another constraint on accessing the resonant Bose gases. In this paper, we offer a potential solution by… [Phys. Rev. A 93, 043605] Published Wed Apr 06, 2016

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Quantum filaments in dipolar Bose-Einstein condensates (2016)

F. Wächtler and L. Santos

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-28

Beschreibung: Author(s): F. Wächtler and L. Santos Collapse in dipolar Bose-Einstein condensates may be arrested by quantum fluctuations. Due to the anisotropy of the dipole-dipole interactions, the dipole-driven collapse induced by soft excitations is compensated by the repulsive Lee-Huang-Yang contribution resulting from quantum fluctuations of ha… [Phys. Rev. A 93, 061603(R)] Published Fri Jun 24, 2016

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Stoner ferromagnetism of a strongly interacting Fermi gas in the quasirepulsive regime (2016)

Lianyi He, Xia-Ji Liu, Xu-Guang Huang, and Hui Hu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-28

Beschreibung: Author(s): Lianyi He, Xia-Ji Liu, Xu-Guang Huang, and Hui Hu Recent advances in rapidly quenched ultracold atomic Fermi gases near a Feshbach resonance have brought about a number of interesting problems in the context of observing the long-sought Stoner ferromagnetic phase transition. The possibility of experimentally obtaining a “quasirepulsive” regime in t… [Phys. Rev. A 93, 063629] Published Fri Jun 24, 2016

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Enhanced effects of variation of the fundamental constants in laser interferometers and application to dark-matter detection (2016)

Y. V. Stadnik and V. V. Flambaum

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-28

Beschreibung: Author(s): Y. V. Stadnik and V. V. Flambaum We outline laser interferometer measurements to search for variation of the electromagnetic fine-structure constant α and particle masses (including a nonzero photon mass). We propose a strontium optical lattice clock—silicon single-crystal cavity interferometer as a small-scale platform for these m… [Phys. Rev. A 93, 063630] Published Fri Jun 24, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Periodic driving control of Raman-induced spin-orbit coupling in Bose-Einstein condensates: The heating mechanisms (2016)

J. M. Gomez Llorente and J. Plata

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-29

Beschreibung: Author(s): J. M. Gomez Llorente and J. Plata We focus on a technique recently implemented for controlling the magnitude of synthetic spin-orbit coupling (SOC) in ultracold atoms in the Raman-coupling scenario. This technique uses a periodic modulation of the Raman-coupling amplitude to tune the SOC. Specifically, it has been shown that the eff… [Phys. Rev. A 93, 063633] Published Tue Jun 28, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Localization of wave packets in one-dimensional random potentials (2016)

Juan Pablo Ramírez Valdes and Thomas Wellens

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-29

Beschreibung: Author(s): Juan Pablo Ramírez Valdes and Thomas Wellens We study the expansion of an initially strongly confined wave packet in a one-dimensional weak random potential with short correlation length. At long times, the expansion of the wave packet comes to a halt due to destructive interferences leading to Anderson localization. We develop an analytical d… [Phys. Rev. A 93, 063634] Published Tue Jun 28, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Quantum simulators based on the global collective light-matter interaction (2016)

Santiago F. Caballero-Benitez, Gabriel Mazzucchi, and Igor B. Mekhov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-29

Beschreibung: Author(s): Santiago F. Caballero-Benitez, Gabriel Mazzucchi, and Igor B. Mekhov We show that coupling ultracold atoms in optical lattices to quantized modes of an optical cavity leads to quantum phases of matter, which at the same time possess properties of systems with both short- and long-range interactions. This opens perspectives for novel quantum simulators of finite-range… [Phys. Rev. A 93, 063632] Published Tue Jun 28, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Dimensional crossover of nonrelativistic bosons (2016)

Soeren Lammers, Igor Boettcher, and Christof Wetterich

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-29

Beschreibung: Author(s): Soeren Lammers, Igor Boettcher, and Christof Wetterich We investigate how confining a transverse spatial dimension influences the few- and many-body properties of nonrelativistic bosons with pointlike interactions. Our main focus is on the dimensional crossover from three to two dimensions, which is of relevance for ultracold-atom experiments. Using fun… [Phys. Rev. A 93, 063631] Published Mon Jun 27, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Itinerant ferromagnetism in one-dimensional two-component Fermi gases (2016)

Yuzhu Jiang, D. V. Kurlov, Xi-Wen Guan, F. Schreck, and G. V. Shlyapnikov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-06

Beschreibung: Author(s): Yuzhu Jiang, D. V. Kurlov, Xi-Wen Guan, F. Schreck, and G. V. Shlyapnikov We study a one-dimensional (1D) two-component atomic Fermi gas with an infinite intercomponent contact repulsion. It is found that adding an attractive nearly resonant odd-wave interaction breaking the rotational symmetry one can make the ground state ferromagnetic. A promising system for the observ… [Phys. Rev. A 94, 011601(R)] Published Tue Jul 05, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Skyrmionic vortex lattices in coherently coupled three-component Bose-Einstein condensates (2016)

Natalia V. Orlova, Pekko Kuopanportti, and Milorad V. Milošević

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-13

Beschreibung: Author(s): Natalia V. Orlova, Pekko Kuopanportti, and Milorad V. Milošević We show numerically that a harmonically trapped and coherently Rabi-coupled three-component Bose-Einstein condensate can host unconventional vortex lattices in its rotating ground state. The discovered lattices incorporate square and zig-zag patterns, vortex dimers and chains, and doubly quantized v… [Phys. Rev. A 94, 023617] Published Fri Aug 12, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Phase diagram of dipolar hard-core bosons on a honeycomb lattice (2016)

Takashi Nakafuji, Takeshi Ito, Yuya Nagamori, and Ikuo Ichinose

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-12

Beschreibung: Author(s): Takashi Nakafuji, Takeshi Ito, Yuya Nagamori, and Ikuo Ichinose In this paper, we study phase diagrams of dipolar hard-core boson gases on a honeycomb lattice. The system is described by the Haldane-Bose-Hubbard model with complex hopping amplitudes and nearest-neighbor repulsion. By using the slave-particle representation of the hard-core bosons and also the pa… [Phys. Rev. A 94, 023613] Published Thu Aug 11, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Generalized gradient expansion for inhomogeneous dynamical mean-field theory: Application to ultracold atoms in a harmonic trap (2016)

J. K. Freericks, Shuyang Han, Karlis Mikelsons, and H. R. Krishnamurthy

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-12

Beschreibung: Author(s): J. K. Freericks, Shuyang Han, Karlis Mikelsons, and H. R. Krishnamurthy We develop a generalized gradient expansion of the inhomogeneous dynamical mean-field theory method for determining properties of ultracold atoms in a trap. This approach goes beyond the well-known local density approximation and at higher temperatures, in the normal phase, it shows why the local de… [Phys. Rev. A 94, 023614] Published Thu Aug 11, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Engineering interactions and anyon statistics by multicolor lattice-depth modulations (2016)

Lorenzo Cardarelli, Sebastian Greschner, and Luis Santos

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-12

Beschreibung: Author(s): Lorenzo Cardarelli, Sebastian Greschner, and Luis Santos We show that a multicolor modulation of the depth of an optical lattice allows for a flexible independent control of correlated hopping, occupation-dependent gauge fields, effective on-site interactions without Feshbach resonances, and nearest-neighbor interactions. As a result, the lattice-depth mo… [Phys. Rev. A 94, 023615] Published Thu Aug 11, 2016

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Time-optimal quantum control of nonlinear two-level systems (2016)

Xi Chen, Yue Ban, and Gerhard C. Hegerfeldt

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-20

Beschreibung: Author(s): Xi Chen, Yue Ban, and Gerhard C. Hegerfeldt Nonlinear two-level Landau-Zener type equations for systems with relevance for Bose-Einstein condensates and nonlinear optics are considered and the minimal time T min to drive an initial state to a given target state is investigated. Surprisingly, the nonlinearity may be canceled by a time-optimal u… [Phys. Rev. A 94, 023624] Published Fri Aug 19, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Single-shot simulations of dynamics of quantum dark solitons (2016)

Andrzej Syrwid, Mirosław Brewczyk, Mariusz Gajda, and Krzysztof Sacha

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-20

Beschreibung: Author(s): Andrzej Syrwid, Mirosław Brewczyk, Mariusz Gajda, and Krzysztof Sacha Eigenstates of Bose particles with repulsive contact interactions in one-dimensional space with periodic boundary conditions can be found with the help of the Bethe ansatz. The type II excitation spectrum identified by E. H. Lieb, reproduces the dispersion relation of dark solitons in the mean-field… [Phys. Rev. A 94, 023623] Published Thu Aug 18, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Synthetic dimensions in the strong-coupling limit: Supersolids and pair superfluids (2016)

Thomas Bilitewski and Nigel R. Cooper

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-26

Beschreibung: Author(s): Thomas Bilitewski and Nigel R. Cooper We study the many-body phases of bosonic atoms with N internal states confined to a one-dimensional (1D) optical lattice under the influence of a synthetic magnetic field and strong repulsive interactions. The N internal states of the atoms are coupled via Raman transitions creating the synthetic ma… [Phys. Rev. A 94, 023630] Published Thu Aug 25, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Topological bound states of a quantum walk with cold atoms (2016)

Samuel Mugel, Alessio Celi, Pietro Massignan, János K. Asbóth, Maciej Lewenstein, and Carlos Lobo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-27

Beschreibung: Author(s): Samuel Mugel, Alessio Celi, Pietro Massignan, János K. Asbóth, Maciej Lewenstein, and Carlos Lobo We suggest a method for engineering a quantum walk, with cold atoms as walkers, which presents topologically nontrivial properties. We derive the phase diagram, and show that we are able to produce a boundary between topologically distinct phases using the finite beam width of the applied lasers. A … [Phys. Rev. A 94, 023631] Published Fri Aug 26, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Cluster mean-field signature of entanglement entropy in bosonic superfluid-insulator transitions (2016)

Li Zhang (张莉), Xizhou Qin (秦锡洲), Yongguan Ke (柯勇贯), and Chaohong Lee (李朝红)

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-31

Beschreibung: Author(s): Li Zhang (张莉), Xizhou Qin (秦锡洲), Yongguan Ke (柯勇贯), and Chaohong Lee (李朝红) Entanglement entropy (EE), a fundamental concept in quantum information for characterizing entanglement, has been extensively employed to explore quantum phase transitions (QPTs). Although the conventional single-site mean-field (MF) approach successfully predicts the emergence of QPTs, it fails to … [Phys. Rev. A 94, 023634] Published Tue Aug 30, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Spin evolution of cold atomic gases in SU(2) ⊗ U(1) fields (2016)

I. V. Tokatly and E. Ya. Sherman

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-30

Beschreibung: Author(s): I. V. Tokatly and E. Ya. Sherman We consider response function and spin evolution in spin-orbit coupled cold atomic gases in a synthetic gauge magnetic field influencing solely the orbital motion of atoms. We demonstrate that various regimes of spin-orbit coupling strength, magnetic field, and disorder can be treated within a singl… [Phys. Rev. A 93, 063635] Published Wed Jun 29, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Second-order virial expansion for an atomic gas in a harmonic waveguide (2016)

Tom Kristensen, Xavier Leyronas, and Ludovic Pricoupenko

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-01

Beschreibung: Author(s): Tom Kristensen, Xavier Leyronas, and Ludovic Pricoupenko The virial expansion for cold two-component Fermi and Bose atomic gases is considered in the presence of a waveguide and in the vicinity of a Feshbach resonance. The interaction between atoms and the coupling with the Feshbach molecules is modeled using a quantitative separable two-channel model. Th… [Phys. Rev. A 93, 063636] Published Thu Jun 30, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Dynamics of fermions in an amplitude-modulated lattice (2016)

Tomotake Yamakoshi, Shinichi Watanabe, Shun Ohgoda, and Alexander P. Itin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-07-01

Beschreibung: Author(s): Tomotake Yamakoshi, Shinichi Watanabe, Shun Ohgoda, and Alexander P. Itin We study the dynamics of fermions loaded in an optical lattice with a superimposed parabolic trap potential. In the recent Hamburg experiments [J. Heinze et al. , Phys. Rev. Lett. 110 , 085302 (2013) ] on quantum simulation of photoconductivity, a modulation pulse on the optical lattice transferred pa… [Phys. Rev. A 93, 063637] Published Thu Jun 30, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Coarsening and thermalization properties of a quenched ferromagnetic spin-1 condensate (2016)

Lewis A. Williamson and P. B. Blakie

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-09

Beschreibung: Author(s): Lewis A. Williamson and P. B. Blakie We examine the dynamics of a quasi-two-dimensional spin-1 condensate in which the quadratic Zeeman energy q is suddenly quenched to a value where the system has a ferromagnetic ground state. There are two distinct types of ferromagnetic phases, i.e., a range of q values where the magnetization prefe… [Phys. Rev. A 94, 023608] Published Mon Aug 08, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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String order via Floquet interactions in atomic systems (2016)

Tony E. Lee, Yogesh N. Joglekar, and Philip Richerme

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-11

Beschreibung: Author(s): Tony E. Lee, Yogesh N. Joglekar, and Philip Richerme We study the transverse-field Ising model with interactions that are modulated in time. In a rotating frame, the system is described by a time-independent Hamiltonian with many-body interactions, similar to the cluster Hamiltonians of measurement-based quantum computing. In one dimension, there is a… [Phys. Rev. A 94, 023610] Published Tue Aug 09, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Light scattering from dense cold atomic media (2016)

Bihui Zhu, John Cooper, Jun Ye, and Ana Maria Rey

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-11

Beschreibung: Author(s): Bihui Zhu, John Cooper, Jun Ye, and Ana Maria Rey Light shifts in a cold atomic medium are studied using a microscopic coherent dipole model, a random walk model, and a semiclassical model that directly accounts for motional effects. However, even with the motion of the atoms considered, the current models still fall short of explaining the large density-dependent light shifts measured with 88 Sr atoms. [Phys. Rev. A 94, 023612] Published Tue Aug 09, 2016

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Cotrapping different species in ion traps using multiple radio frequencies (2016)

Dimitris Trypogeorgos and Christopher J. Foot

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-11

Beschreibung: Author(s): Dimitris Trypogeorgos and Christopher J. Foot We consider the stability of systems subjected to periodic parametric driving in the context of ions confined by oscillating electric fields. The behavior of these systems can be understood in terms of a pseudopotential approximation and resonances arising from parametric excitation. We investigate … [Phys. Rev. A 94, 023609] Published Tue Aug 09, 2016

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Superfluid transition in the attractive Hofstadter-Hubbard model (2016)

R. O. Umucalılar and M. Iskin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-11

Beschreibung: Author(s): R. O. Umucalılar and M. Iskin We consider a Fermi gas that is loaded onto a square optical lattice and subjected to a perpendicular artificial magnetic field, and determine its superfluid transition boundary by adopting a BCS-like mean-field approach in momentum space. The multiband structure of the single-particle Hofstadter sp… [Phys. Rev. A 94, 023611] Published Tue Aug 09, 2016

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Asymmetric sequential Landau-Zener dynamics of Bose-condensed atoms in a cavity (2016)

Jiahao Huang (黄嘉豪), Pu Gong (龚璞), Xizhou Qin (秦锡洲), Honghua Zhong (钟宏华), and Chaohong Lee (李朝红)

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-16

Beschreibung: Author(s): Jiahao Huang (黄嘉豪), Pu Gong (龚璞), Xizhou Qin (秦锡洲), Honghua Zhong (钟宏华), and Chaohong Lee (李朝红) We explore the asymmetric sequential Landau-Zener (LZ) dynamics in an ensemble of interacting Bose-condensed two-level atoms coupled with a cavity field. Assuming the couplings between all atoms and the cavity field are identical, the interplay between atom-atom interaction and detuning may lead to … [Phys. Rev. A 94, 023618] Published Mon Aug 15, 2016

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Creating Feshbach resonances for ultracold molecule formation with radio-frequency fields (2016)

Daniel J. Owens, Ting Xie, and Jeremy M. Hutson

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-16

Beschreibung: Author(s): Daniel J. Owens, Ting Xie, and Jeremy M. Hutson We show that radio-frequency (rf) radiation may be used to create Feshbach resonances in ultracold gases of alkali-metal atoms at desired magnetic fields that are convenient for atomic cooling and degeneracy. For the case of K 39 + Cs 133 , where there are no rf-free resonances in regions where Cs may be… [Phys. Rev. A 94, 023619] Published Mon Aug 15, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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