Dynamical back-reaction of relic gravitons

Details Dynamical back-reaction of relic gravitons Dynamical back-reaction of relic gravitons

2006-01-15

arxiv.org/abs/hep-th/0601097v1

Phys.Rev.D73:083505,2006

Physics

High Energy Physics

High Energy Physics - Theory

40 pages, 8 included figures

Scientific paper

10.1103/PhysRevD.73.083505

The dynamical effects of the tensor modes of the geometry are investigated in the context of curvature bounces. Since the bouncing behaviour implies sharp deviations from a radiation-dominated evolution, significant back-reaction effects of relic gravitons may be expected at short wavelengths. After developing a general iterative framework for the calculation of dynamical back-reaction effects, explicit analytical and numerical examples are investigated for different parametrizations of the energy-momentum pseudo-tensor(s) of the produced gravitons. The reported results suggest that dynamical back-reaction effects are a necessary ingredient for a consistent description of bouncing models at late times.

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