Bosons in a Toroidal Trap: Ground State and Vortices
Condensed Matter
2009-10-31 v1
Abstract
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.
Cite
@article{arxiv.cond-mat/9901121,
title = {Bosons in a Toroidal Trap: Ground State and Vortices},
author = {L. Salasnich and A. Parola and L. Reatto},
journal= {arXiv preprint arXiv:cond-mat/9901121},
year = {2009}
}
Comments
15 pages + 4 figures, to be published in Phys. Rev. A