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hep-ph2026
From inflation to hot big bang -- a tutorial on cosmological perturbations
Mikko Laine, Simona Procacci
These lecture notes are meant as a pedagogic guide to cosmological inflation and the early epochs thereafter. Inflation explains how the seeds for density perturbations, which evol…
hep-ph2024
Evolution of coupled scalar perturbations through smooth reheating. I. Dissipative regime
M. Laine, S. Procacci, A. Rogelj
If the inflaton is a heavy scalar field, it may equilibrate slower than some other degrees of freedom, e.g. non-Abelian gauge bosons. In this case, perturbations in the inflaton fi…
hep-ph2024
Smooth reheating and dark matter via non-Abelian gauge theory
Simone Biondini, Helena Kolesova, Simona Procacci
We demonstrate how a dark sector can provide a crucial link between a vacuum-dominated early universe and the later radiation-dominated epoch. As an example, we consider a feeble a…