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Renormalization of nonequilibrium dynamics in FRW cosmology

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arxiv hep-ph/9706274 v2 pith:6X3XIH62 submitted 1997-06-06 hep-ph gr-qchep-th

Jurgen Baacke , Katrin Heitmann , Carsten Patzold (Dortmund University) This is my paper · ORCID
classification hep-phgr-qchep-th
keywords nonequilibriumdynamicsanalyticallyapproximationassumedbackchosenconditions
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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.

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  1. Quantum correlations in a gravitational collapse simulation with SpheriCo.jl

    gr-qc 2024-12 conditional novelty 6.0 of 10

    SpheriCo.jl enables longer semiclassical collapse simulations and yields hints of non-trivial correlations of the scalar field across a dynamically formed apparent horizon.

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