Inflation and the semiclassical dynamics of a conformal scalar field
High Energy Physics - Theory
2008-11-26 v2 Astrophysics
General Relativity and Quantum Cosmology
Abstract
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.
Keywords
Cite
@article{arxiv.0708.0483,
title = {Inflation and the semiclassical dynamics of a conformal scalar field},
author = {G. L. Alberghi and C. Appignani and R. Casadio and F. Sbisá and A. Tronconi},
journal= {arXiv preprint arXiv:0708.0483},
year = {2008}
}
Comments
10 pages, REVTeX, no figures. Final version accepted for publication in PRD