Weekly seminars
Sub- and super-Hubble fluctuations from cosmic inflation
par
→
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.
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.
Contact