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Bose-Einstein condensation of a weakly-interacting gas

C. G. Townsend, N. J. van Druten, Michael R. Andrews, Dallin Durfee, Dan Stamper-Kurn, M.‐O. Mewes, Wolfgang Ketterle

Published Jan 1, 1997• 0 citations
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The Bose-Einstein condensation (BEC) of weakly interacting Bose gases has been realized recently in experiment. The condensation temperature of a uniform interacting Bose gas is an important thermodynamic quantity fot the BEC. In this paper, the pseudopotential method and grand canonical ensemble are used to investigate the condensation temperature of the uniform interacting Bose gas. The results show that, due to the interaction between particles, the shift of the condensation temperature is δT c/T c=-2.9an 1/3 , where a and n are the two-particle scattering length of S- wave and the particle number density, respectively.