Controlled vortex-sound interactions in atomic Bose-Einstein condensates.
AuthorParker, NG; Proukakis, NP; Barenghi, CF; Adams, CS
Source TitlePhysical Review Letters
PublisherAmerican Physical Society (APS)
University of Melbourne Author/sParker, Nicholas
Document TypeJournal Article
CitationsParker, N. G., Proukakis, N. P., Barenghi, C. F. & Adams, C. S. (2004). Controlled vortex-sound interactions in atomic Bose-Einstein condensates.. Phys Rev Lett, 92 (16), pp.160403-. https://doi.org/10.1103/PhysRevLett.92.160403.
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C1 - Journal Articles Refereed
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.
KeywordsCondensed Matter Physics - Structural Properties ; Physical Sciences
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