First and Second Sound Modes of a Bose-Einstein Condensate in a Harmonic Trap
Condensed Matter
2009-10-30 v3
Abstract
We have calculated the first and second sound modes of a dilute interacting Bose gas in a spherical trap for temperatures () and for systems with to particles. The second sound modes (which exist only below ) generally have a stronger temperature dependence than the first sound modes. The puzzling temperature variations of the sound modes near recently observed at JILA in systems with particles match surprisingly well with those of the first and second sound modes of much larger systems.
Keywords
Cite
@article{arxiv.cond-mat/9710274,
title = {First and Second Sound Modes of a Bose-Einstein Condensate in a Harmonic Trap},
author = {V. B. Shenoy and Tin-Lun Ho},
journal= {arXiv preprint arXiv:cond-mat/9710274},
year = {2009}
}
Comments
a shorten version, more discussions are given on the nature of the second sound. A long footnote on the recent work of Zaremba, Griffin, and Nikuni (cond-mat/9705134) is added, the spectrum of the (\ell=1, n_2=0) mode is included in fig.1