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Lookup NU author(s): Professor Nick ParkerORCiD, Dr Joy AllenORCiD, Professor Carlo Barenghi, Professor Nikolaos ProukakisORCiD
We show that the interaction between vortices and sound waves in atomic Bose-Einstein condensates can be elucidated in a double-well trap: With one vortex in each well, the sound emitted by each precessing vortex can be driven into the opposing vortex (if of the same polarity). This cross talk leads to a periodic exchange of energy between the vortices which is long range and highly efficient. The increase in vortex energy (obtained by simulations of the Gross-Pitaevskii equation) is experimentally observable as a migration of the vortex to higher density over just a few precession periods. Similar effects can be controllably engineered by introducing a precessing localized obstacle into one well as an artificial generator of sound, thereby demonstrating the parametric driving of energy into a vortex.
Author(s): Parker NG, Allen AJ, Barenghi CF, Proukakis NP
Publication type: Article
Publication status: Published
Journal: Physical Review A
Year: 2012
Volume: 86
Issue: 1
Print publication date: 20/07/2012
Date deposited: 17/11/2012
ISSN (print): 1050-2947
ISSN (electronic): 1094-1622
Publisher: American Physical Society
URL: http://dx.doi.org/10.1103/PhysRevA.86.013631
DOI: 10.1103/PhysRevA.86.013631
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