Impurity Dynamics in a Bose Condensate

Details Impurity Dynamics in a Bose Condensate Impurity Dynamics in a Bose Condensate

1999-01-05

arxiv.org/abs/cond-mat/9901028v1

Physics

Condensed Matter

Statistical Mechanics

8 pages, 7 figures, invited talk given at the XXII International Workshop on Condensed Matter Theories, June 1-7,1998, Vanderb

Scientific paper

We estimate the changes in the condensate ground state energy induced by one or more "sizable" impurities. By "sizable", we mean an impurity whose size is within a few orders of magnitude of the trap size and not necessarily atomic in scale. A sizable impurity will "drill" a hole in the condensate wave function and alter the condensate energy. The question is whether this microscopic change can be detected macroscopically because of the Bose-Einstein condensation effect. We discuss the effect of impurity expulsion, condensate interactions, and the induced interaction between two impurities.

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