Conformally coupled inflation
General Relativity and Quantum Cosmology
2013-09-20 v1
Abstract
A massive scalar field in a curved spacetime can propagate along the light cone, a causal pathology, which can, in principle, be eliminated only if the scalar couples conformally to the Ricci curvature of spacetime. This property mandates conformal coupling for the field driving inflation in the early universe. During slow-roll inflation, this coupling can cause super-acceleration and, as a signature, a blue spectrum of primordial gravitational waves.
Keywords
Cite
@article{arxiv.1309.4900,
title = {Conformally coupled inflation},
author = {Valerio Faraoni},
journal= {arXiv preprint arXiv:1309.4900},
year = {2013}
}
Comments
12 pages, no figures, invited paper to appear in "Cosmology with Fluid Components", special issue of "Galaxies" edited by I. Brevik