Kinetic Theory of Collective Modes in Atomic Clouds above the Bose-Einstein Transition Temperature
Condensed Matter
2007-05-23 v1
Abstract
We calculate frequencies and damping rates of the lowest collective modes of a dilute Bose gas confined in an anisotropic trapping potential above the Bose-Einstein transition temperature. From the Boltzmann equation with a simplified collision integral we derive a general dispersion relation that interpolates between the collisionless and hydrodynamic regimes. In the case of axially symmetric traps we obtain explicit expressions for the frequencies and damping rates of the lowest modes in terms of a phenomenological collision time. Our results are compared with microscopic calculations and experiments.
Cite
@article{arxiv.cond-mat/9908043,
title = {Kinetic Theory of Collective Modes in Atomic Clouds above the Bose-Einstein Transition Temperature},
author = {U. Al Khawaja and C. J. Pethick and H. Smith},
journal= {arXiv preprint arXiv:cond-mat/9908043},
year = {2007}
}
Comments
Nordita preprint NORDITA-1999/46 CM