A theoretical study on the damping of collective excitations in a Bose-Einstein condensate

Details A theoretical study on the damping of collective excitations in a Bose-Einstein condensate A theoretical study on the damping of collective excitations in a Bose-Einstein condensate

1997-08-11

arxiv.org/abs/cond-mat/9708080v3

Phys. Rev. Lett. 79 (1997) 4056

Physics

Condensed Matter

Soft Condensed Matter

15 pages, LaTeX, revised for minor corrections on LaTeX file format

Scientific paper

10.1103/PhysRevLett.79.4056

We study the damping of low-lying collective excitations of condensates in a weakly interacting Bose gas model within the framework of imaginary time path integral. A general expression of the damping rate has been obtained in the low momentum limit for both the very low temperature regime and the higher temperature regime. For the latter, the result is new and applicable to recent experiments. Theoretical predictions for the damping rate are compared with the experimental values.

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