Speaker
Description
In this talk I will show new results for the non-linear dynamics of the axion-inflation model. The axion inflation model is expected to be very efficient generating GWs and scalar density perturbations at the end of the inflationary period due to the exponential growth of gauge modes. We will study how the gauge fields backreact on the inflaton dynamics by using lattice simulation, where we simulate all degrees of freedom simultaneously. We will also compare the results from our lattice simulations with those that use analytical approximations and where inhomogeneous effects are neglected. Our simulations were performed using a new lattice formulation based on CosmoLattice, which is a package for lattice simulations of field dynamics in expanding universes.
