Dissipation and Vortex Creation in Bose-Einstein Condensed Gases
Statistical Mechanics
2009-10-31 v2
Abstract
We solve the Gross-Pitaevskii equation to study energy transfer from an oscillating `object' to a trapped Bose-Einstein condensate. Two regimes are found: for object velocities below a critical value, energy is transferred by excitation of phonons at the motion extrema; while above the critical velocity, energy transfer is via vortex formation. The second regime corresponds to significantly enhanced heating, in agreement with a recent experiment.
Cite
@article{arxiv.cond-mat/9912365,
title = {Dissipation and Vortex Creation in Bose-Einstein Condensed Gases},
author = {B. Jackson and J. F. McCann and C. S. Adams},
journal= {arXiv preprint arXiv:cond-mat/9912365},
year = {2009}
}
Comments
4 pages, 5 figures, RevTeX. Typo corrected and Figure 5 modified to include more data. Accepted for publication in Phys. Rev. A