A journey through the theoretical universe

Bouncing cosmological model ambiguities

Jun 29, 2023, 11:00 AM

30m

Salle du conseil (Université de Toulouse, Faculté de médecine)

Speaker

Patrick Peter (CNRS)

Description

I'll present recent results showing that getting a bounce by means of quantising the background may yield to a mild ambiguity on the spectral index of the perturbations, and a more serious one on its amplitude. We trace the origin of this issue to the fact that quantising and applying a canonical transformation do not commute.