Résumé / Abstract Seminaire_GReCO

"Rollercoaster cosmology, and a gravity wave factory"

Guido D'Amico
Dipartimento di Fisica M. Mellon (Parme, Italie)

Does inflation have to happen all in one go? The answer is no!
All cosmological problems can be solved by a sequence of bursts of cosmic acceleration, interrupted by short epochs of decelerated expansion.
In this rollercoaster cosmology, models that seem excluded for a single long stage become viable again, and high-scale inflation is more natural.
At the same time, we expect interesting predictions at several different length scales, such as gravitational wave signals potentially detectable by LISA.
I will describe the general framework, and focus on a realization with two stages of monodromy inflation.

lundi 31 mai 2021 - 11:00
Institut d'Astrophysique de Paris

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