Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-05-25
J.Phys.A39:6687-6693,2006
Physics
High Energy Physics
High Energy Physics - Theory
8 pages, 1 eps figure, IOP style. Based on a talk given by R. O. Ramos at the QFEXT05 workshop, Barcelona, Spain, September 5-
Scientific paper
10.1088/0305-4470/39/21/S69
We discuss unusual aspects of symmetry that can happen due to entropic effects in the context of multi-scalar field theories at finite temperature. We present their consequences, in special, for the case of nonrelativistic models of hard core spheres. We show that for nonrelativistic models phenomena like inverse symmetry breaking and symmetry non-restoration cannot take place, but a reentrant phase at high temperatures is shown to be possible for some region of parameters. We then develop a model of interest in studies of Bose-Einstein condensation in dilute atomic gases and discuss about its phase transition patterns. In this application to a Bose-Einstein condensation model, however, no reentrant phases are found.
Pinto Marcus B.
Ramos Rudnei O.
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