A radiation-like era before inflation
General Relativity and Quantum Cosmology
2009-01-06 v2 High Energy Physics - Theory
Abstract
We show that the semiclassical approximation to the Wheeler-DeWitt equation for the minisuperspace of a minimally coupled scalar field in the spatially flat de Sitter Universe prompts the existence of an initial power-law evolution driven by non-adiabatic terms from the gravitational wavefunction which act like radiation. This simple model hence describes the onset of inflation from a previous radiation-like expansion during which the cosmological constant is already present but subleading.
Keywords
Cite
@article{arxiv.0808.0092,
title = {A radiation-like era before inflation},
author = {Corrado Appignani and Roberto Casadio},
journal= {arXiv preprint arXiv:0808.0092},
year = {2009}
}
Comments
LaTeX, 8 pages, no figures; final version to be published in JCAP