Dissipation and Vortex Creation in Bose-Einstein Condensed Gases

Details Dissipation and Vortex Creation in Bose-Einstein Condensed Gases Dissipation and Vortex Creation in Bose-Einstein Condensed Gases

1999-12-20

arxiv.org/abs/cond-mat/9912365v2

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures, RevTeX. Typo corrected and Figure 5 modified to include more data. Accepted for publication in Phys. Rev.

Scientific paper

10.1103/PhysRevA.61.051603

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.

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