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Interacting bosons in an optical lattice: Bose-Einstein condensates and Mott insulator

O. Fialko·Ch. Moseley·K. Ziegler
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Abstract

A dense Bose gas with hard-core interaction is considered in an optical lattice. We study the phase diagram in terms of a special mean-field theory that describes a Bose-Einstein condensate and a Mott insulator with a single particle per lattice site for zero as well as for non-zero temperatures. We calculate the densities, the excitation spectrum and the static structure factor for each of these phases.

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O. Fialko, Ch. Moseley, K. Ziegler. 2007-04-16. Interacting bosons in an optical lattice: Bose-Einstein condensates and Mott insulator. https://doi.org/10.1103/physreva.75.053616

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