Finite temperature oscillations of a Bose-Einstein condensate in a two-gas model

Details Finite temperature oscillations of a Bose-Einstein condensate in a two-gas model Finite temperature oscillations of a Bose-Einstein condensate in a two-gas model

2000-11-09

arxiv.org/abs/cond-mat/0011163v2

J PHYS B-AT MOL OPT 34 (17): 3575 (2001)

Physics

Condensed Matter

11 pages, 10 eps figures included in the manuscript, submitted to Journal of Physics B

Scientific paper

10.1088/0953-4075/34/17/318

The temperature dependence of the frequencies of a Bose-Einstein condensate obtained in experiment has not been fully understood theoretically. In this paper we present a simplified version of a two-gas model. A numerically-found ground state of the system is used for the small-oscillations analysis. In the case of spherical symmetry a full spectrum of frequencies is found for low orbital quantum numbers. Avoided crossings that appear in the spectrum might be the reason for experimentally observed frequency shifts.

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