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.