Cold Bosonic Atoms in Optical Lattices
Dieter JakschInstitut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, AustriaChristoph BruderInstitut für Theoretische Festkörperphysik, Universität Karlsruhe, D-76128 Karlsruhe, GermanyJ. I. CiracInstitut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, AustriaC. W. GardinerInstitute for Theoretical Physics, University of Santa Barbara, Santa Barbara, California 93106-4030P. ZollerInstitut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria
1998en
ABI
Аннотация
The dynamics of an ultracold dilute gas of bosonic atoms in an optical lattice can be described by a Bose-Hubbard model where the system parameters are controlled by laser light. We study the continuous (zero temperature) quantum phase transition from the superfluid to the Mott insulator phase induced by varying the depth of the optical potential, where the Mott insulator phase corresponds to a commensurate filling of the lattice (``optical crystal''). Examples for formation of Mott structures in optical lattices with a superimposed harmonic trap and in optical superlattices are presented.
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