Bose-Fermi Mixtures in Optical Lattices

Details Bose-Fermi Mixtures in Optical Lattices Bose-Fermi Mixtures in Optical Lattices

2005-11-07

arxiv.org/abs/cond-mat/0511163v1

Laser Physics 16, 360 (2006)

Physics

Condensed Matter

Other Condensed Matter

7 pages, 6 figures, revtex4, 14th International Laser Physics Workshop (LPHYS'05)

Scientific paper

10.1134/S1054660X06020277

Using mean field theory, we have studied Bose-Fermi mixtures in a one-dimensional optical lattice in the case of an attractive boson-fermion interaction. We consider that the fermions are in the degenerate regime and that the laser intensities are such that quantum coherence across the condensate is ensured. We discuss the effect of the optical lattice on the critical rotational frequency for vortex line creation in the Bose-Einstein condensate, as well as how it affects the stability of the boson-fermion mixture. A reduction of the critical frequency for nucleating a vortex is observed as the strength of the applied laser is increased. The onset of instability of the mixture occurs for a sizeably lower number of fermions in the presence of a deep optical lattice.

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