Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-09-10
Physics
Condensed Matter
Other Condensed Matter
15 pages, 9 figures, uses revtex4-1. Added references and clarification of the nature and validity of the assumptions used
Scientific paper
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.
Kobes Randy
Kovalchuk Evgeny
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