Boom and Bust Inflation: a Graceful Exit via Compact Extra Dimensions
High Energy Physics - Theory
2008-12-18 v1 Astrophysics
General Relativity and Quantum Cosmology
Abstract
A model of inflation is proposed in which compact extra dimensions allow a graceful exit without recourse to flat potentials or super-Planckian field values. Though bubbles of true vacuum are too sparse to uniformly reheat the Universe by colliding with each other, a compact dimension enables a single bubble to uniformly reheat by colliding with itself. This mechanism, which generates an approximately scale invariant perturbation spectrum, requires that inflation be driven by a bulk field, that vacuum decay be slow, and that the extra dimension be at least a hundred times larger than the false vacuum Hubble length.
Cite
@article{arxiv.0807.0457,
title = {Boom and Bust Inflation: a Graceful Exit via Compact Extra Dimensions},
author = {Adam R. Brown},
journal= {arXiv preprint arXiv:0807.0457},
year = {2008}
}
Comments
11 pages, 5 figures