Phys. Rev. A 61, 051603(R) (2000) [4 pages]Dissipation and vortex creation in Bose-Einstein condensed gases
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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