Siu A. Chin, Harald Forbert
Published 1999-01-05Version 1
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.
Comments: 8 pages, 7 figures, invited talk given at the XXII International Workshop on Condensed Matter Theories, June 1-7,1998, Vanderbilt University, to be published by Nova Science
Growth and Collapse of a Bose Condensate with Attractive Interactions
Hydrodynamics of a Bose condensate: beyond the mean field approximation (II)
Impurity dynamics in a zero-temperature gas
