Response of Bose gases in time-dependent optical superlattices

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dc.creatorHild, M.
dc.creatorSchmitt, F.
dc.creatorRoth, R.
dc.date2006-06-27
dc.date2006-09-14
dc.date.accessioned2026-07-07T07:35:52Z
dc.date.available2026-07-07T07:35:52Z
dc.descriptionThe dynamic response of ultracold Bose gases in one-dimensional optical lattices and superlattices is investigated based on exact numerical time evolutions in the framework of the Bose-Hubbard model. The system is excited by a temporal amplitude modulation of the lattice potential, as it was done in recent experiments. For regular lattice potentials, the dynamic signatures of the superfluid to Mott-insulator transition are studied and the position and the fine-structure of the resonances is explained by a linear response analysis. Using direct simulations and the perturbative analysis it is shown that in the presence of a two-colour superlattice the excitation spectrum changes significantly when going from the homogeneous Mott-insulator the quasi Bose-glass phase. A characteristic and experimentally accessible signature for the quasi Bose-glass is the appearance of low-lying resonances and a suppression of the dominant resonance of the Mott-insulator phase.
dc.description20 pages, 9 figures; added references and corrected typos
dc.identifierhttps://arxiv.org/abs/cond-mat/0606677
dc.identifierhttp://arxiv.org/abs/cond-mat/0606677
dc.identifierJ. Phys. B: At. Mol. Opt. Phys. 39 (2006) 4547-4562
dc.identifierdoi:10.1088/0953-4075/39/21/015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/120237
dc.subjectStatistical Mechanics
dc.titleResponse of Bose gases in time-dependent optical superlattices
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