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Phys. Rev. A 61, 051603 (2000) [4 pages]

Dissipation and vortex creation in Bose-Einstein condensed gases

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B. Jackson1, J. F. McCann2, and C. S. Adams1
1Department of Physics, Rochester Building, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
2Department of Applied Mathematics and Theoretical Physics, Queen’s University, Belfast, BT7 1NN, United Kingdom

Rapid Communication Received 20 December 1999; published 5 April 2000

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.


©2000 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.61.051603
DOI: 10.1103/PhysRevA.61.051603
PACS: 03.75.Fi, 67.40.Vs, 67.57.De

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