Back Reaction of Gravitational Perturbations

Details Back Reaction of Gravitational Perturbations Back Reaction of Gravitational Perturbations

1997-02-01

arxiv.org/abs/gr-qc/9702004v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages, LaTex using sprocl.sty, to appear in: Proceedings of the 18th Texas Symposium on Relativistic Astrophysics (eds Olint

Scientific paper

The back reaction of gravitational perturbations in a homogeneous background is determined by an effective energy-momentum tensor quadratic in the perturbations. We show that this nonlinear feedback effect is important in the case of long wavelength scalar perturbations in inflationary universe models. We also show how to solve an old problem concerning the gauge dependence of the effective energy-momentum tensor of perturbations.

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