Speaker
Jorinde Van de Vis
(NIKHEF Amsterdam)
Description
We study particle production after multifield inflation with
nonminimal couplings to gravity. A comparison between a linearized
treatment and lattice simulations allows us to determine when nonlinear
effects, such as rescattering and backreaction, become important. We
track the equation of state on the lattice and show that it relaxes to
1/3. We also show that the spectra of the produced particles relax to
thermal spectra. The duration of reheating depends on the value of the
nonminimal coupling. For large values, reheating completes almost
instantaneously, whereas for smaller values the energy density remains
mostly in the inflaton field and some perturbative decay process is
needed for reheating to complete.
Primary author
Jorinde Van de Vis
(NIKHEF Amsterdam)
