SpheriCo.jl enables longer semiclassical collapse simulations and yields hints of non-trivial correlations of the scalar field across a dynamically formed apparent horizon.
Renormalization of nonequilibrium dynamics in FRW cosmology
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abstract
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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Quantum correlations in a gravitational collapse simulation with SpheriCo.jl
SpheriCo.jl enables longer semiclassical collapse simulations and yields hints of non-trivial correlations of the scalar field across a dynamically formed apparent horizon.