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Regimes of classical transport of cold gases in a two-dimensional anisotropic disorder

hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorPEZZÉ, Luca
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorROBERT-DE-SAINT-VINCENT, Martin
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorBOURDEL, Thomas
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorBRANTUT, Jean-Philippe
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorALLARD, Baptiste
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorPLISSON, Thomas
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorASPECT, Alain
hal.structure.identifierlp2n-03,lp2n-11
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorBOUYER, Philippe
hal.structure.identifierlaboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
dc.contributor.authorSANCHEZ-PALENCIA, Laurent
dc.date.accessioned2023-05-12T10:58:10Z
dc.date.available2023-05-12T10:58:10Z
dc.date.issued2011
dc.identifier.issn1367-2630
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/181975
dc.description.abstractEnWe numerically study the dynamics of cold atoms in a two-dimensional disordered potential. We consider an anisotropic speckle potential and focus on the classical dynamics, which is relevant to some recent experiments. Firstly, we study the behavior of particles with a fixed energy and identify different transport regimes. At low energy, the particles are classically localized due to the absence of a percolating cluster. At high energy, the particles undergo normal diffusion, and we show that the diffusion coefficients scale algebraically with the particle energy, with an anisotropy factor that is significantly different from that of the disordered potential. At intermediate energy, we find a transient sub-diffusive regime, which is relevant to the time scale of typical experiments. Secondly, we study the behavior of a cold atomic gas with an arbitrary energy distribution, using the above results as the groundwork. We show that the density profile of the atomic cloud in the diffusion regime is strongly peaked and, in particular, that it is not Gaussian. Its behavior at large distances allows us to extract the energy-dependent diffusion coefficients from experimental density distributions. For a thermal cloud released into the disordered potential, we show that our numerical predictions are in agreement with experimental findings. Not only does this paper give insights into recent experimental results, but it may also help in the interpretation of future experiments searching for deviation from classical diffusion and traces of Anderson localization.
dc.language.isoen
dc.publisherInstitute of Physics: Open Access Journals
dc.title.enRegimes of classical transport of cold gases in a two-dimensional anisotropic disorder
dc.typeArticle de revue
dc.identifier.doi10.1088/1367-2630/13/9/095015
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Gaz Quantiques [cond-mat.quant-gas]
dc.identifier.arxiv1103.2294
dc.description.sponsorshipEuropeFrom Anderson localization to Bose, Fermi and spin glasses in disordered ultracold gases
bordeaux.journalNew Journal of Physics
bordeaux.page095015
bordeaux.volume13
bordeaux.hal.laboratoriesLaboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-00576550
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00576550v1
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