Séminaire / Seminar GReCO |
| « The Inflationary Butterly Effect: non-perturbative dynamics from small-scale features » |
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Angelo Caravano |
| I will present the first non-perturbative study of a model of inflation with a localized departure from slow-roll. Using lattice simulations, we find that small-scale oscillatory features in the potential can lead to drastic changes in the evolution of the inflationary Universe, with profound phenomenological implications. In certain cases, the entire Universe gets trapped in an eternal de Sitter state. In others, only some regions get stuck in a false vacuum and become primordial black holes in the form of baby Universes. Our results demonstrate that small-scale phenomena can have a drastic impact on the evolution of the whole inflationary Universe. This “inflationary butterfly effect" highlights the need for a fully nonlinear treatment in the exploration of the small-scale physics of inflation, particularly in the parameter range relevant for observations. Additionally, we compare our fully nonlinear lattice power spectra with perturbative 1-loop calculations. |
|
lundi 4 mars 2024 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |