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PIRSA:10040109

Galilean Genesis: an alternative to inflation

Creminelli, P. (2010). Galilean Genesis: an alternative to inflation. Perimeter Institute. https://pirsa.org/10040109

Paolo Creminelli The Abdus Salam International Centre for Theoretical Physics (ICTP)

Talk numberPIRSA:10040109
DOI10.48660/10040109
Collection
Talk Type Conference
Subject

Abstract

I will discuss an alternative to inflation based on a Galileon field. The model starts in a (contracting or expanding) quasi Minkowski phase and all the energy of the Universe in generated suddenly in a sort of Genesis associated with a strong violation of the Null Energy Condition. The symmetries of the model force any additional scalar field to acquire a scale invariant spectrum of perturbations.