103 citations · 320 across the 7 of their papers we have counts for
7 papers
Renormalization of the nonequilibrium dynamics of fermions in a flat FRW universe
J. Baacke, C. Patzold
We derive the renormalized equations of motion and the renormalized energy-momentum tensor for fermions coupled to a spatially homogeneous scalar field (inflaton) in a flat FRW geo…
Out-of-equilibrium evolution of scalar fields in FRW cosmology: renormalization and numerical simulations
J. Baacke, C. Patzold
We present a renormalized computational framework for the evolution of a self-interacting scalar field (inflaton) and its quantum fluctuations in an FRW background geometry. We inc…
Nonequilibrium dynamics of fermions in a spatially homogeneous scalar background field
Juergen Baacke, Katrin Heitmann, Carsten Patzold
We consider the time evolution of systems in which a spatially homogeneous scalar field is coupled to fermions. The quantum back-reaction is taken into account in one-loop approxim…
Renormalization of nonequilibrium dynamics at large N and finite temperature
Juergen Baacke, Katrin Heitmann, Carsten Patzold
We generalize a previously proposed renormalization and computation scheme for nonequilibrium dynamics to include finite temperature and one-loop selfconsistency as arising in the…
On the choice of initial states in nonequilibrium dynamics
Juergen Baacke, Katrin Heitmann, Carsten Patzold
Imposing initial conditions to nonequilibrium systems at some time t_0 leads, in renormalized quantum field theory, to the appearance of singularities in the variable t-t_0 in rele…
Renormalization of nonequilibrium dynamics in FRW cosmology
Jurgen Baacke, Katrin Heitmann, Carsten Patzold
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 f…
Nonequilibrium dynamics: a renormalized computation scheme
Juergen Baacke, Katrin Heitmann, Carsten Patzold
We present a regularized and renormalized version of the one-loop nonlinear relaxation equations that determine the non-equilibrium time evolution of a classical (constant) field c…