Localization and delocalization of ultracold bosonic atoms in finite optical lattices

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dc.creatorLühmann, Dirk-Sören
dc.creatorBongs, Kai
dc.creatorSengstock, Klaus
dc.creatorPfannkuche, Daniela
dc.date2007-10-02
dc.date2008-04-14
dc.date.accessioned2026-07-07T09:31:53Z
dc.date.available2026-07-07T09:31:53Z
dc.descriptionWe study bosonic atoms in small optical lattices by exact diagonalization and observe a striking similarity to the superfluid to Mott insulator transition in macroscopic systems. The momentum distribution, the formation of an energy gap, and the pair correlation function show only a weak size dependence. For noncommensurate filling we reveal in deep lattices a mixture of localized and delocalized particles, which is sensitive to lattice imperfections. Breaking the lattice symmetry causes a Bose-glass-like behavior. We discuss the nature of excited states and orbital effects by using an exact diagonalization technique that includes higher bands.
dc.description8 pages, 10 figures. Published version
dc.identifierhttps://arxiv.org/abs/0710.0522
dc.identifierhttp://arxiv.org/abs/0710.0522
dc.identifierPhys. Rev. A 77, 023620 (2008)
dc.identifierdoi:10.1103/PhysRevA.77.023620
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/158615
dc.subjectOther Condensed Matter
dc.titleLocalization and delocalization of ultracold bosonic atoms in finite optical lattices
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