Persistent current of atoms in a ring optical lattice

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dc.creatorKolovsky, Andrey R.
dc.date2006-07-11
dc.date.accessioned2026-07-07T07:15:56Z
dc.date.available2026-07-07T07:15:56Z
dc.descriptionWe consider a small ensemble of Bose atoms in a ring optical lattice with weak disorder. The atoms are assumed to be initially prepared in a superfluid state with non-zero quasimomentum and, hence, may carry matter current. It is found that the atomic current persists in time for a low value of the quasimomentum but decays exponentially for a high (around one quater of the Brillouin zone) quasimomentum. The explanation is given in terms of low- and high-energy spectra of the Bose-Hubbard model, which we describe using the Bogoliubov and random matrix theories, respectively.
dc.description17 pages, IOP-style
dc.identifierhttps://arxiv.org/abs/cond-mat/0607274
dc.identifierhttp://arxiv.org/abs/cond-mat/0607274
dc.identifierNew Journal of Physics 8 (2006) 197
dc.identifierdoi:10.1088/1367-2630/8/9/197
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/113405
dc.subjectSoft Condensed Matter
dc.subjectMesoscale and Nanoscale Physics
dc.titlePersistent current of atoms in a ring optical lattice
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