Résumé / Abstract Seminaire_GReCO

"Matter Bounce and Non-Gaussianities"

W. Xue

A nonsingular bouncing cosmology in which the scales of interest today exit the Hubble radius in a matter-dominated contracting phase yields an alternative to inflation for producing a scale-invariant spectrum of adiabatic cosmological fluctuations. In this talk I will present how to realize the matter bounce by Lee-wick cosmology and Horava-Lifshitz gravity. In order to explain the cosmological experiments, I will show how to get the cosmological fluctuations from the contracting phase and through the bouncing, and in order to distinguish it from the results of inflationary model, I will identify signatures in the Non-Gaussianities of the fluctuations which are specific to this scenario.

lundi 12 juillet 2010 - 11:00
Salle des séminaires Évry Schatzman,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage