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- W2951089057 abstract "We report a multiple-site mean-field analysis of the zero-temperature phase diagram for ultracold bosons in realistic optical superlattices. The system of interacting bosons is described by a Bose-Hubbard model whose site-dependent parameters reflect the nontrivial periodicity of the optical superlattice. An analytic approach is formulated based on the analysis of the stability of a fixed-point of the map defined by the self-consistency condition inherent in the mean-field approximation. The experimentally relevant case of the period-2 one-dimensional superlattice is briefly discussed. In particular, it is shown that, for a special choice of the superlattice parameters, the half-filling insulator domain features an unusual loophole shape that the single-site mean-field approach fails to capture." @default.
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- W2951089057 date "2004-09-15" @default.
- W2951089057 modified "2023-09-27" @default.
- W2951089057 title "Analytical mean-field approach to the phase-diagram of ultracold bosons in optical superlattices" @default.
- W2951089057 hasPublicationYear "2004" @default.
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