The Matter Bounce Curvaton Scenario

Details The Matter Bounce Curvaton Scenario The Matter Bounce Curvaton Scenario

2011-01-04

arxiv.org/abs/1101.0822v2

JCAP 1103:003,2011

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 4 figs; a few references added

Scientific paper

10.1088/1475-7516/2011/03/003

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.

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