Bosons in a Toroidal Trap: Ground State and Vortices

Details Bosons in a Toroidal Trap: Ground State and Vortices Bosons in a Toroidal Trap: Ground State and Vortices

1999-01-13

arxiv.org/abs/cond-mat/9901121v1

Phys. Rev. A 59 (1999) 2990-2995

Physics

Condensed Matter

15 pages + 4 figures, to be published in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.59.2990

We study the Bose-Einstein condensate (BEC) in a 3-D toroidal Mexican hat trap. By changing the parameters of the potential, or the number of bosons, it is possible to modify strongly the density profile of the BEC. We consider the ground state properties for positive and negative scattering length and calculate the spectrum elementary excitations. We also discuss the macroscopic phase coherence and superfluidity of the BEC by analyzing vortex states and their stability.

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