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Ph.D. Candidate:  George Panagopoulos

Research Advisor:  Eva Silverstein

Date: Tuesday, May , 25, 2021
Time: 1 pm
Zoom Link:

Zoom Password: email for password

Title: Strong Tails in Multifield Inflation


In this talk, we investigate the tail of the distribution of cosmological perturbations in multifield inflation. We show that it can be quite generally paramatrically non-Gaussian by considering relative flat directions in the mulifield potential landscape. These fields can develop very non-Gaussian profiles, that then mix with the inflaton, producing a heavy tail. This leads us to a new primordial black hole production mechanism. We also study the connected N-point correlation functions of these theories and find that they have a general N!-enhancement. Finally, we present a new mechanism for inflation which exhibits a speed limit on scalar motion, generating accelerated expansion even on a steep potential.




May 25, 2021 - 1:00pm