Weekly seminars

Sub- and super-Hubble fluctuations from cosmic inflation

par Pierre Auclair (UC Louvain)

Europe/Paris
Auditorium (LAPTh)

Auditorium

LAPTh

9, chemin de Bellevue ANNECY
Description
Cosmic Inflation is currently the most favoured scenario of the early 
Universe. It implies that all forms of matter and radiation observed 
today, as well as their large scale structures, are the outcome of 
coupled quantum fluctuations of both the metric and a yet unknown scalar 
degree of freedom around a quasi de-Sitter empty universe.

For this seminar, we will start with a general introduction on cosmic 
inflation. I will then explain how one can derive the shape of the 
expected power spectra of both the quantum-generated gravitational waves 
and curvature perturbations that will be used for the incoming spatial 
and ground based cosmological observations.
And in the last part, I would like to present a recent article 
(arxiv:2302.14530) in which we show (and calculate) how super-Hubble 
cosmological fluctuations induce, at any time in the cosmic history, a 
non-vanishing spatial curvature of the local background metric.