Simulating the inflationary Universe: from single-field to the axion-U(1) model

Understand

We present a nonlinear study of the inflationary epoch based on numerical lattice simulations.

• Lattice simulations are a well-known tool in primordial cosmology, and they have been extensively used to study the reheating epoch after inflation.
• We generalize this known machinery to the inflationary epoch.
• Being this the first simulation of the inflationary epoch much before the end of inflation, the first part of the thesis focuses on the minimal single-field model of inflation.