Erich J Mueller et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 4561 doi:10.1088/0953-4075/34/23/303
Erich J Mueller, Gordon Baym and Markus Holzmann
Show affiliationsWe study the Bose-Einstein condensation phase transition in a weakly interacting gas through a perturbative analysis of finite systems. In both the grand canonical and the canonical ensembles, perturbation theory suffers from infrared divergences and cannot directly determine the transition temperature in the thermodynamic limit. However, in conjunction with finite-size scaling, perturbation theory provides a powerful calculation tool. Here we use this combination of perturbation theory and scaling to estimate a shift in the transition temperature in the canonical ensemble consistent with grand canonical calculations.
Issue 23 (14 December 2001)
Received 1 July 2001
Published 21 November 2001
Erich J Mueller et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 4561
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