Speaker
Dr
Ville Vaskonen
Description
Cosmological first-order phase transitions may have played a significant role in the generation of the baryon asymmetry, intergalactic magnetic fields, and dark matter, while potentially leaving behind an observable gravitational wave (GW) signal. In this talk, I will present our recent simulations of GW production during phase transitions, focusing on strongly supercooled and slow transitions, which generate the strongest GW signals. I will also discuss how such transitions may produce large inhomogeneities that collapse into primordial black holes after the transition.