Speaker
Stefano Orani
(Basel University)
Description
During hilltop inflation, the inflaton rolls away from the maximum of its potential and towards the minimum where the universe reheats. The first stage of reheating, preheating, is non-perturbative and, in this model, localized oscillating bubbles of the inflaton field, called oscillons, are formed. Furthermore, when other fields are present, they can be produced via a parametric resonance with the non-homogeneous inflaton field.
In this talk, I will discuss lattice simulations of the evolution of oscillons, how they are affected by the resonance with another field and their effect on the expansion history of the universe.
Author
Stefano Orani
(Basel University)
Co-authors
Mr
David Nolde
(University of Basel)
Francesco Cefalà
(University of Basel)
Stefan Antusch
(University of Basel)
