On the Back Reaction Problem for Gravitational Perturbations

Details On the Back Reaction Problem for Gravitational Perturbations On the Back Reaction Problem for Gravitational Perturbations

1996-09-10

arxiv.org/abs/gr-qc/9609026v1

Phys.Rev.Lett.78:1624-1627,1997

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, uses LATEX

Scientific paper

10.1103/PhysRevLett.78.1624

We derive the effective energy-momentum tensor for cosmological perturbations and prove its gauge-invariance. The result is applied to study the influence of perturbations on the behaviour of the Friedmann background in inflationary Universe scenarios. We found that the back reaction of cosmological perturbations on the background can become important already at energies below the self-reproduction scale.

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