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Controlled vortex-sound interactions in atomic Bose-Einstein condensates.

Parker, N. G. and Proukakis, N. P. and Barenghi, C. F. and Adams, C. S. (2004) 'Controlled vortex-sound interactions in atomic Bose-Einstein condensates.', Physical review letters., 92 (16). p. 160403.


The low temperature dynamics of a vortex in a trapped quasi-two-dimensional Bose-Einstein condensate are studied quantitatively. Precession of an off-centered 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 stabilizes the vortex against radiation-induced decay.

Item Type:Article
Keywords:Dark solitons, Vortices, Dynamics, Motion, Decay.
Full text:PDF - Other (218Kb)
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Publisher statement:© 2004 by The American Physical Society. All rights reserved.
Record Created:28 Apr 2008
Last Modified:05 Aug 2011 09:20

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