Cold bosonic atoms in optical lattices

Details Cold bosonic atoms in optical lattices Cold bosonic atoms in optical lattices

1998-05-26

arxiv.org/abs/cond-mat/9805329v3

Phys. Rev. Lett. 81, 3108 (1998).

Physics

Condensed Matter

Statistical Mechanics

4 pages 4 figures New: added references; Postscript version available at: http://th-physics.uibk.ac.at/zoller/Publications/P

Scientific paper

10.1103/PhysRevLett.81.3108

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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