Nonequilibrium quantum dynamics of phase transitions in an expanding universe

Details Nonequilibrium quantum dynamics of phase transitions in an expanding universe Nonequilibrium quantum dynamics of phase transitions in an expanding universe

1998-09-21

arxiv.org/abs/hep-ph/9809469v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

7pages, using RevTeX, no figures. Contribution to 5th International Workshop on Thermal Field Theories (Regensburg, August 199

Scientific paper

I summarize the derivation of a set of Feynman rules appropriate for the perturbative description of the nonequilibrium dynamics of the symmetry-breaking phase transition in $\lambda\phi^4$ theory in a Robertson-Walker universe. The approximation scheme I develop provides for a treatment of dissipative effects which are essential to an adequate description of the nonequilibrium state. It also provides for the emergence from an initially symmetric state of a final state exhibiting the properties of spontaneous symmetry breaking without the introduction by hand of any explicit symmetry breaking.

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