Pre-inflationary perturbations spectrum
General Relativity and Quantum Cosmology
2016-11-09 v1 Astrophysics
Abstract
In the framework of a flat FLRW model we derive an inflationary regime in which the scalar field, laying on the plateau of its potential, admits a linear time dependence and remains close to a constant value. The behaviour of inhomogeneous perturbations is determined on the background metric in agreement to the "slow-rolling" approximation. We show that the inhomogeneous scales which before inflation were not much greater then the physical horizon, conserve their spectrum (almost) unaltered after the de Sitter phase.
Cite
@article{arxiv.gr-qc/0402071,
title = {Pre-inflationary perturbations spectrum},
author = {Giovanni Imponente and Giovanni Montani},
journal= {arXiv preprint arXiv:gr-qc/0402071},
year = {2016}
}