Condensate fraction and critical temperature of a trapped interacting Bose gas

Details Condensate fraction and critical temperature of a trapped interacting Bose gas Condensate fraction and critical temperature of a trapped interacting Bose gas

1996-07-16

arxiv.org/abs/cond-mat/9607117v1

Physics

Condensed Matter

8 pages, REVTEX, 2 figures, also available at http://anubis.science.unitn.it/~oss/bec/BEC.html

Scientific paper

10.1103/PhysRevA.54.R4633

By using a mean field approach, based on the Popov approximation, we calculate the temperature dependence of the condensate fraction of an interacting Bose gas confined in an anisotropic harmonic trap. For systems interacting with repulsive forces we find a significant decrease of the condensate fraction and of the critical temperature with respect to the predictions of the non-interacting model. These effects go in the opposite direction compared to the case of a homogeneous gas. An analytic result for the shift of the critical temperature holding to first order in the scattering length is also derived.

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