Quasiequilibrium Mixture of Itinerant and Localized Bose Atoms in Optical Lattice

V. I. Yukalov; A. Rakhimov; S. Mardonov

doi:10.1134/s1054660x11010233

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arXiv · 1101.0499

Quasiequilibrium Mixture of Itinerant and Localized Bose Atoms in Optical Lattice

V. I. Yukalov·A. Rakhimov·S. Mardonov

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Abstract

Conditions are studied under which there can exist a quasiequilibrium mixture of itinerant and localized bosonic atoms in an optical lattice, even at zero temperature and at integer filling factor, when such a coexistence is impossible for an equilibrium lattice. The consideration is based on a model having the structure of a two-band, or two-component, boson Hubbard Hamiltonian. The minimal value for the ratio of on-site repulsion to tunneling parameter, necessary for the occurrence of such a mixture, is found.

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V. I. Yukalov, A. Rakhimov, S. Mardonov. 2011-01-03. Quasiequilibrium Mixture of Itinerant and Localized Bose Atoms in Optical Lattice. https://doi.org/10.1134/s1054660x11010233

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