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

Journal Article · Tue Nov 15 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.72.0· OSTI ID:20786548

Guilleumas, M; Centelles, M; Barranco, M; Mayol, R; Pi, M ^[1]

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1. Departament d'Estructura i Constituents de la Materia, Facultat de Fisica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona (Spain)

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 {sup 87}Rb-{sup 40}K mixtures may undergo collapse, we analyze the related question of how the optical lattice affects the mechanical stability of the system.

• OSTI ID: 20786548
• Journal Information: Physical Review. A, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevA.72.053602; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
CRITICAL FREQUENCY
FERMIONS
LASER RADIATION
MEAN-FIELD THEORY
MIXTURES
NUCLEATION
ONE-DIMENSIONAL CALCULATIONS
POTASSIUM 40
RADIATION PRESSURE
RUBIDIUM 87
STABILITY
TRAPPING
VORTICES