Speaker
Toshifumi Noumi
(Tokyo University, Tokyo)
Description
I will give an introduction to the effective field theory (EFT) of open systems aimed at cosmologists. After motivating why open systems are relevant in cosmology, I will discuss Brownian motion as the simplest illustrative example. I will then present the EFT construction for open systems with spontaneous symmetry breaking and in the presence of gravity, with cosmological applications in mind.