Weakly interacting Bose gases below the critical temperature

2007/09/10 by Kovalchuk, E., Kobes, R.
#FOS: Physical sciences #Other Condensed Matter (cond-mat.other)

paper · doi:10.48550/arxiv.0709.1293

Abstract

We consider a homogeneous non-ideal Bose gas at nonzero temperature in equilibrium below the critical temperature T_C in the framework of finite temperature field theory. An algorithm is described in which a manageable subset of diagrams can be considered which, coupled with a self--consistent condition related to the minimization of the free energy, can be used to obtain physically reasonable results.

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