Inflation and the semiclassical dynamics of a conformal scalar field

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We derive the semiclassical evolution of massless conformally coupled scalar matter in the de Sitter space-time from the Born-Oppenheimer reduction of the Wheeler-DeWitt equation. We find a remarkable difference with respect to the minimally coupled case: the effect of the quantum gravitational corrections do not depend on the momentum of the scalar mode up to second order in the Planck length and, therefore, there are no relevant corrections to the dispersion relation.
10 pages, REVTeX, no figures. Final version accepted for publication in PRD

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

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http://salesiana.dossiersoluciones.com/handle/123456789/193327

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0708.0483
 http://arxiv.org/abs/0708.0483
 Phys.Rev.D77:044002,2008
 doi:10.1103/PhysRevD.77.044002

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arXiv