Comment on "Collective Excitations of a Bose-Einstein Condensate in a Magnetic Trap"

Details Comment on "Collective Excitations of a Bose-Einstein Condensate in a Magnetic Trap" Comment on "Collective Excitations of a Bose-Einstein Condensate in a Magnetic Trap"

1997-02-13

arxiv.org/abs/cond-mat/9702122v1

Physics

Condensed Matter

Soft Condensed Matter

2 pages, REVTeX, one figure included

Scientific paper

We calculate the damping rate of collective excitations for a nearly pure Bose-Einstein condensate regarding the recent experiments in MIT [M.-O. Mews et al, Phys. Rev. Lett. 77, 988 (1996)]. The decay time of collective excitations obtained in our theoretical calculations agrees well with their experimental result. We argue that the damping of collective excitations is due to thermal contributions rather than interactions between collective modes.

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