Quasiequilibrium Mixture of Itinerant and Localized Bose Atoms in Optical Lattice

Details Quasiequilibrium Mixture of Itinerant and Localized Bose Atoms in Optical Lattice Quasiequilibrium Mixture of Itinerant and Localized Bose Atoms in Optical Lattice

2011-01-03

arxiv.org/abs/1101.0499v1

Laser Phys. 21 (2011) 264-270

Physics

Condensed Matter

Quantum Gases

Latex file, 15 pages, one figure

Scientific paper

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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