"Cherenkov radiation" of a sound in a Bose-condensed gas

Details "Cherenkov radiation" of a sound in a Bose-condensed gas "Cherenkov radiation" of a sound in a Bose-condensed gas

2001-09-13

arxiv.org/abs/cond-mat/0109236v1

Physics Letters A, Vol. 282 (6) (2001) pp. 421-427

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1016/S0375-9601(01)00197-9

In terms of linearized Gross-Pitaevskii equation we have studied the process of sound emission arises from a supersonic particle motion in a Bose-condensed gas. By analogy with the method used for description of Vavilov-Cherenkov phenomenon, we have found a friction work created by the particle generated condensate polarization. For comparison we have found radiation intensity of excitations. Both methods gives the same result.

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