On the Back Reaction Problem for Gravitational Perturbations

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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.
4 pages, uses LATEX

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General Relativity and Quantum Cosmology, Astrophysics, High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/186926

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/9609026
 http://arxiv.org/abs/gr-qc/9609026
 Phys.Rev.Lett.78:1624-1627,1997
 doi:10.1103/PhysRevLett.78.1624

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arXiv