Standard Cosmology Delayed
General Relativity and Quantum Cosmology
2015-05-28 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
The introduction of a delay in the Friedmann equation of cosmological evolution is shown to result in the very early universe undergoing the necessary accelerated expansion in the usual radiation (or matter) dominated phase. Occurring even without a violation of the strong energy condition, this expansion slows down naturally to go over to the decelerated phase, namely the standard Hubble expansion. This may obviate the need for a scalar field driven inflationary epoch.
Cite
@article{arxiv.1106.6231,
title = {Standard Cosmology Delayed},
author = {Debajyoti Choudhury and Debashis Ghoshal and Anjan Ananda Sen},
journal= {arXiv preprint arXiv:1106.6231},
year = {2015}
}
Comments
12 pages, 3 figures, Revised with more elaborate discussions. Accepted for publication in JCAP