Dissipation and Vortex Creation in Bose-Einstein Condensed Gases

Preprint

20 December 1999

preprint
Published by arXiv in arXiv

Abstract

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.

Keywords

BOSE EINSTEIN CONDENSED
EINSTEIN CONDENSATE
VORTEX CREATION
CONDENSED GASES
CRITICAL VALUE
PHONONS

All Related Versions

Version 1, 1999-12-20, ArXiv
Version 2, 2000-02-14, ArXiv
Published version: Physical Review A, 61 (5), 051603.

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