Speaker
Kodai Sakurai
Description
The decay of a scalar condensate is an important phenomenon in cosmology, including inflation and reheating.
We compute the decay of a scalar condensate using two distinct methods: (1) an approach based on the parametric resonance of the mode functions of the daughter particles, and (2) an approach based on the effective action given by the sum of Feynman diagrams. We then demonstrate that, at lower order in a double expansion in the amplitude of coherent oscillations and the velocity of the daughter particles, the results obtained from these two approaches are equivalent.
Finally, we discuss the time evolution of the scalar-condensate decay in both frameworks.
Primary authors
Ayuki Kamada
(University of Warsaw)
Kodai Sakurai
