Ground State and Quasiparticle Spectrum of a Two Component Bose-Einstein Condensate
Soft Condensed Matter
2009-10-31 v2 Statistical Mechanics
Abstract
We consider a dilute atomic Bose-Einstein condensate with two non-degenerate internal energy levels. The presence of an external radiation field can result in new ground states for the condensate which result from the lowering of the condensate energy due to the interaction energy with the field. In this approach there are no instabilities in the quasiparticle spectrum as was previously found by Goldstein and Meystre (Phys. Rev. A \QTR{bf}{55}, 2935 (1997)).
Keywords
Cite
@article{arxiv.cond-mat/0012011,
title = {Ground State and Quasiparticle Spectrum of a Two Component Bose-Einstein Condensate},
author = {C. P. Search and A. G. Rojo and P. R. Berman},
journal= {arXiv preprint arXiv:cond-mat/0012011},
year = {2009}
}
Comments
20 pages, 2 figures RevTex. Submitted to Phys. Rev. A; Revised version