Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-06-06
Phys.Rev. D56 (1997) 6556-6565
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, RevTeX, some obvious typos corrected
Scientific paper
10.1103/PhysRevD.56.6556
We derive the renormalized nonequilibrium equations of motion for a scalar field and its quantum back reaction in a conformally flat Friedmann-Robertson-Walker universe. We use a fully covariant formalism proposed by us recently for handling numerically and analytically nonequilibrium dynamics in one-loop approximation. The system is assumed to be in a conformal vacuum state initially. We use dimensional regularization; we find that the counter terms can be chosen independent of the initial conditions though the divergent leading order graphs do depend on them.
Baacke Jurgen
Heitmann Katrin
Patzold Carsten
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