Diversity in the Phoenix Universe
Abstract
It has recently been argued by Copeland et al. that in eleven dimensions two orbifold planes can collide and bounce in a regular way, even when the bulk metric is perturbed away from Milne spacetime to a Kasner solution. In this paper, we point out that as a consequence the global "phoenix" structure of the cyclic universe is significantly enriched. Spatially separated regions, with different density fluctuation amplitudes as well as different non-gaussian characteristics, are all physically realized. Those regions containing by far the most structure are specified by a fluctuation amplitude of Q ~ 10^{-4.5} and local non-gaussianity parameters f_{NL} ~ O(+/- 10) and g_{NL} ~ O(-10^3), in agreement with current observations.
Cite
@article{arxiv.1107.4551,
title = {Diversity in the Phoenix Universe},
author = {Jean-Luc Lehners},
journal= {arXiv preprint arXiv:1107.4551},
year = {2013}
}
Comments
20 pages, 3 figures