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Critical frequency for vortex nucleation in Bose-Fermi mixtures in optical lattices
Guilleumas, Montserrat; Centelles Aixalà, Mario; Barranco Gómez, Manuel; Mayol Sánchez, Ricardo; Pi Pericay, Martí
Universitat de Barcelona
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.
2010-05-04
Constitució de la matèria
Ionització
Excitació nuclear
Constitution of matter
Ionization
(c) The American Physical Society, 2005
Article
The American Physical Society
         

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