13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

Preheating after hilltop inflation

14 Dec 2015, 17:15
Level -1, Room 16 (International Conference Centre Geneva)

Level -1, Room 16

International Conference Centre Geneva


Stefano Orani (Basel University)


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.

Primary author

Stefano Orani (Basel University)


Mr David Nolde (University of Basel) Francesco Cefalà (University of Basel) Stefan Antusch (University of Basel)

Presentation materials