Avenues of Quantum Field Theory In Curved Spacetime 2025

Primordial Black Holes from inflationary perturbations: loss of perturbative predictability?

Jan 23, 2025, 5:10 PM

40m

Amphi E040, building E1, ground floor (Tours, France)

Plenary Talk

Speaker

Cristiano Germani (Universitat de Barcelona)

Description

Primordial Black Holes are the outcome of rarely large cosmological fluctuations generated during a post slow-roll and non-attractor phase of inflation. Several authors reported a loss of (quantum) perturbative predictability of cosmological perturbations in the transition from the two phases. In this talk I will clarify that, in all physically relevant cases, quantum perturbation theory is guaranteed to work.