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Critical frequency for vortex nucleation in Bose-Fermi mixtures in optical lattices

M. Guilleumas·M. Centelles·M. Barranco·R. Mayol·M. Pi
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Abstract

We investigate within mean-field theory the influence of a one-dimensional optical lattice and of trapped degenerate fermions on the critical rotational frequency for vortex line creation in a Bose-Einstein condensate. We consider laser intensities of the lattice such that quantum coherence across the condensate is ensured. We find a sizable decrease of the thermodynamic critical frequency for vortex nucleation with increasing applied laser strength and suggest suitable parameters for experimental observation. Since 87Rb-40K mixtures may undergo collapse, we analyze the related question of how the optical lattice affects the mechanical stability of the system.

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M. Guilleumas, M. Centelles, M. Barranco, R. Mayol, M. Pi. 2005-11-07. Critical frequency for vortex nucleation in Bose-Fermi mixtures in optical lattices. https://doi.org/10.1103/physreva.72.053602

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