Messengers of the very early universe: Gravitational Waves and Primordial Black Holes

Session

14 afternnon session part 2

14 Dec 2022, 16:00

Sala Grande (Centro Universitario Padovano)

76. Stochastic GW Backgrounds

Marc Kamionkowski (JHU)

14/12/2022, 16:00

Invited Talk

77. Lattice simulations of axion-U(1) inflation

Angelo Caravano (LMU Munich)

Invited Talk

I present the first nonlinear lattice simulation of an axion field coupled to a U(1) gauge field during inflation. The simulation allows to fully characterize the statistics of the primordial curvature perturbation. We find high-order statistics to be essential in describing non-Gaussianity in the linear regime of the theory. On the contrary, non-Gaussianity is suppressed when the dynamics...