The Matter Bounce Curvaton Scenario
High Energy Physics - Theory
2015-03-17 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
Massless scalar fields originating in a quantum vacuum state acquire a scale-invariant spectrum of fluctuations in a matter-dominated contracting universe. We show that these isocurvature fluctuations transfer to a scale-invariant spectrum of curvature fluctuations during a non-singular bounce phase. This provides a mechanism for enhancing the primordial adiabatic fluctuations and suppressing the ratio of tensor to scalar perturbations. Moreover, this mechanism leads to new sources of non-Gaussianity of curvature perturbations.
Cite
@article{arxiv.1101.0822,
title = {The Matter Bounce Curvaton Scenario},
author = {Yi-Fu Cai and Robert Brandenberger and Xinmin Zhang},
journal= {arXiv preprint arXiv:1101.0822},
year = {2015}
}
Comments
15 pages, 4 figs; a few references added