Controlled vortex-sound interactions in atomic Bose-Einstein condensates
Condensed Matter
2009-11-10 v1
Abstract
The low temperature dynamics of a vortex in a trapped quasi-two-dimensional Bose-Einstein condensate are studied quantitatively. Precession of an off-centred vortex in a dimple trap, embedded in a weaker harmonic trap, leads to the emission of sound in a dipolar radiation pattern. Sound emission and reabsorption can be controlled by varying the depth of the dimple. In a shallow dimple, the power emitted is proportional to the vortex acceleration squared over the precession frequency, whereas for a deep dimple, periodic sound reabsorption stabilises the vortex against radiation-induced decay.
Cite
@article{arxiv.cond-mat/0312520,
title = {Controlled vortex-sound interactions in atomic Bose-Einstein condensates},
author = {N. G. Parker and N. P. Proukakis and C. F. Barenghi and C. S. Adams},
journal= {arXiv preprint arXiv:cond-mat/0312520},
year = {2009}
}
Comments
4 pages, 5 figures