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Critical temperature of a trapped Bose gas: Mean-field theory and fluctuations

By M. Houbiers, H.T.C. Stoof and E.A. Cornell

Abstract

We investigate the possibilities of distinguishing the mean-field and fluctuation effects on the critical temperature of a trapped Bose gas with repulsive interatomic interactions. Since in a direct measurement of the critical temperature as a function of the number of trapped atoms these effects are small compared to the ideal gas results, we propose to observe Bose-Einstein condensation by adiabatically ramping down the trapping frequency. Moreover, analyzing this adiabatic cooling scheme, we show that fluctuation effects can lead to the formation of a Bose-Einstein condensate at frequencies which are much larger than those predicted by the mean-field theory

Topics: Natuur- en Sterrenkunde
Year: 1997
OAI identifier: oai:dspace.library.uu.nl:1874/13576
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