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Beyond-mean-field behavior of large Bose-Einstein condensates in double-well potentials (2013)

Bettina Gertjerenken and Christoph Weiss

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-07

Beschreibung: Author(s): Bettina Gertjerenken and Christoph Weiss For the dynamics of Bose-Einstein condensates (BECs), differences between mean-field (Gross-Pitaevskii) physics and N -particle quantum physics often disappear if the BEC becomes larger and larger. In particular, the time scale for which both dynamics agree should thus become larger if the particle n... [Phys. Rev. A 88, 033608] Published Fri Sep 06, 2013

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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Thermodynamics of strongly correlated one-dimensional Bose gases (2013)

Andreas Vogler, Ralf Labouvie, Felix Stubenrauch, Giovanni Barontini, Vera Guarrera, and Herwig Ott

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-12

Beschreibung: Author(s): Andreas Vogler, Ralf Labouvie, Felix Stubenrauch, Giovanni Barontini, Vera Guarrera, and Herwig Ott We investigate the thermodynamics of one-dimensional (1D) Bose gases in the strongly correlated regime. To this end, we prepare ensembles of independent 1D Bose gases in a two-dimensional optical lattice and perform high-resolution in situ imaging of the column-integrated density distribution. Using... [Phys. Rev. A 88, 031603] Published Wed Sep 11, 2013

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

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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Large quantum superpositions of a levitated nanodiamond through spin-optomechanical coupling (2013)

Zhang-qi Yin, Tongcang Li, Xiang Zhang, and L. M. Duan

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-12

Beschreibung: Author(s): Zhang-qi Yin, Tongcang Li, Xiang Zhang, and L. M. Duan We propose a method to generate and detect large quantum superposition states and arbitrary Fock states for the oscillational mode of an optically levitated nanocrystal diamond. The nonlinear interaction required for the generation of non-Gaussian quantum states is enabled through the spin-mechanica... [Phys. Rev. A 88, 033614] Published Wed Sep 11, 2013

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

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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Postadiabatic Hamiltonian for low-energy excitations in a slowly-time-dependent BCS-BEC crossover (2013)

Bernhard M. Breid and James R. Anglin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-17

Beschreibung: Author(s): Bernhard M. Breid and James R. Anglin We develop a Hamiltonian that describes the time-dependent formation of a molecular Bose-Einstein condensate from a Bardeen-Cooper-Schrieffer state of fermionic atoms as a result of slowly sweeping through a Feshbach resonance. In contrast to many other calculations in the field, our Hamiltonian inc... [Phys. Rev. A 88, 033617] Published Mon Sep 16, 2013

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

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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Correlation lengths of the repulsive one-dimensional Bose gas (2013)

Ovidiu I. Pâţu and Andreas Klümper

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-20

Beschreibung: Author(s): Ovidiu I. Pâţu and Andreas Klümper We investigate the large-distance asymptotic behavior of the static density-density and field-field correlation functions in the one-dimensional Bose gas at finite temperature. The asymptotic expansions of the Bose gas correlators are obtained performing a specific continuum limit in the similar low... [Phys. Rev. A 88, 033623] Published Thu Sep 19, 2013

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

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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6

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Tight-binding model for exciton-polariton condensates in external potentials (2013)

Piotr Stępnicki and Michał Matuszewski

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-24

Beschreibung: Author(s): Piotr Stępnicki and Michał Matuszewski We propose a mean-field model to describe exciton-polariton condensates in deep periodic external potentials. We derive a set of coupled discrete equations for both condensed and uncondensed components, with interaction and tunneling coefficients obtained within the tight-binding approximation. We u... [Phys. Rev. A 88, 033626] Published Mon Sep 23, 2013

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

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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7

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Zero sound in a two-dimensional dipolar Fermi gas (2013)

Zhen-Kai Lu, S. I. Matveenko, and G. V. Shlyapnikov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-24

Beschreibung: Author(s): Zhen-Kai Lu, S. I. Matveenko, and G. V. Shlyapnikov We study zero sound in a weakly interacting two-dimensional (2D) gas of single-component fermionic dipoles (polar molecules or atoms with a large magnetic moment) tilted with respect to the plane of their translational motion. It is shown that the propagation of zero sound is provided by both mean-f... [Phys. Rev. A 88, 033625] Published Mon Sep 23, 2013

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

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Digitale ISSN: 1094-1622

Thema: Physik

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8

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Demixing in symmetric supersolid mixtures (2013)

Piyush Jain, Saverio Moroni, Massimo Boninsegni, and Lode Pollet

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-27

Beschreibung: Author(s): Piyush Jain, Saverio Moroni, Massimo Boninsegni, and Lode Pollet The droplet crystal phase of a symmetric binary mixture of soft-core bosons is studied by computer simulation. At high temperature each droplet comprises on average equal numbers of particles of either component, but the two components demix below the supersolid transition temperature, i.e., droplet... [Phys. Rev. A 88, 033628] Published Thu Sep 26, 2013

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

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Digitale ISSN: 1094-1622

Thema: Physik

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9

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Classification of spin-nematic squeezing in spin-1 collective atomic systems (2013)

Emi Yukawa, Masahito Ueda, and Kae Nemoto

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-27

Beschreibung: Author(s): Emi Yukawa, Masahito Ueda, and Kae Nemoto In spin-1 collective atomic systems, the spin and nematic-tensor operators constitute the su(3) Lie algebra, whose su(2) subalgebras are shown to give two distinct classes of squeezing which are unitarily equivalent to spin squeezing and spin-nematic squeezing. We explicitly construct a unitary oper... [Phys. Rev. A 88, 033629] Published Thu Sep 26, 2013

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

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Digitale ISSN: 1094-1622

Thema: Physik

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10

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Transverse spin diffusion in strongly interacting Fermi gases (2013)

Tilman Enss

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-28

Beschreibung: Author(s): Tilman Enss We compute spin diffusion in a dilute Fermi gas at arbitrary temperature, polarization, and strong interaction in the normal phase using kinetic theory. While the longitudinal spin diffusivity D ∥ depends weakly on polarization and diverges for small temperatures, the transverse spin diffusivity D ⊥ h... [Phys. Rev. A 88, 033630] Published Fri Sep 27, 2013

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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