Designing Cyclic Universe Models
High Energy Physics - Theory
2008-11-26 v4 Astrophysics
High Energy Physics - Phenomenology
Abstract
Recent advances in understanding the propagation of perturbations through the transition from big crunch to big bang (esp. Tolley et al. hep-th/0306109) make it possible for the first time to consider the full set of phenomenological constraints on the scalar field potential in cyclic models of the universe. We show that cyclic models require a comparable degree of tuning to that needed for inflationary models. The constraints are reduced to a set of simple design rules including "fast-roll" parameters analogous to the "slow-roll" parameters in inflation.
Cite
@article{arxiv.hep-th/0307132,
title = {Designing Cyclic Universe Models},
author = {Justin Khoury and Paul J. Steinhardt and Neil Turok},
journal= {arXiv preprint arXiv:hep-th/0307132},
year = {2008}
}
Comments
4 pages, 2 figures. Minor typos and figure corrected