Pre-Big-Bang Inflation Requires Fine Tuning
High Energy Physics - Theory
2016-08-25 v1 Astrophysics
Abstract
The pre-big-bang cosmology inspired by superstring theories has been suggested as an alternative to slow-roll inflation. We analyze, in both the Jordan and Einstein frames, the effect of spatial curvature on this scenario and show that too much curvature --- of either sign --- reduces the duration of the inflationary era to such an extent that the flatness and horizon problems are not solved. Hence, a fine-tuning of initial conditions is required to obtain enough inflation to solve the cosmological problems.
Cite
@article{arxiv.hep-th/9705035,
title = {Pre-Big-Bang Inflation Requires Fine Tuning},
author = {Michael S. Turner and Erick J. Weinberg},
journal= {arXiv preprint arXiv:hep-th/9705035},
year = {2016}
}
Comments
13 pages, Latex, 3 figures included