arXiv 0809.21902008-09-12cond-mat.othercond-mat.str-el

Rotating states for trapped bosons in an optical lattice

Emil Lundh

备注：: 6 pages, 6 figures, accepted for publication in EPL
DOI：: 10.1209/0295-5075/84/10007

英文摘要：

Rotational states for trapped bosons in an optical lattice are studied in the framework of the Hubbard model. Critical frequencies are calculated and the main parameter regimes are identified. Transitions are observed from edge superfluids to vortex lattices with Mott insulating cores, and subsequently to lattices of interstitial vortices. The former transition coincides with the Mott transition. Changes in symmetry of the vortex lattices are observed as a function of lattice depth. Predictions for experimental signatures are presented.

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