Jd. Smith et Dj. Toms, BOSE-EINSTEIN CONDENSATION AS SYMMETRY-BREAKING IN COMPACT CURVED SPACETIMES, Physical review. D. Particles and fields, 53(10), 1996, pp. 5771-5780
We examine Bose-Einstein condensation as a form of symmetry breaking i
n the specific model of the Einstein static universe. We show that sym
metry breaking never occurs in the sense that the chemical potential m
u never reaches its critical value. This leads us to some statements a
bout spaces of finite volume in general. In an appendix we clarify the
relationship between the standard statistical mechanical approaches a
nd the field theory method using zeta functions.