Critical Temperature of an Interacting Bose Gas in a Generic Power-Law Potential

Details Critical Temperature of an Interacting Bose Gas in a Generic Power-Law Potential Critical Temperature of an Interacting Bose Gas in a Generic Power-Law Potential

2002-04-18

arxiv.org/abs/cond-mat/0204402v1

Int. J. Mod. Phys. B 16, 2185 (2002)

Physics

Condensed Matter

Statistical Mechanics

9 pages, 1 figure, 1 table, to be published in Int. J. Mod. Phys. B, related papers can be found at http://www.mi.infm.it/sala

Scientific paper

10.1142/S0217979202010348

We investigate the critical temperature of an interacting Bose gas confined in a trap described by a generic isotropic power-law potential. We compare the results with respect to the non-interacting case. In particular, we derive an analytical formula for the shift of the critical temperature holding to first order in the scattering length. We show that this shift scales as $N^{n\over 3(n+2)}$, where $N$ is the number of Bosons and $n$ is the exponent of the power-law potential. Moreover, the sign of the shift critically depends on the power-law exponent $n$. Finally, we find that the shift of the critical temperature due to finite-size effects vanishes as $N^{-{2n\over 3(n+2)}}$.

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