Speaker
Sergio Jorás
(Universidade Federal do Rio de Janeiro – UFRJ)
Description
This work starts from a toy model for inflation in a class of modified theories of gravity in the metric formalism. Instead of the standard procedure -- assuming a non-linear Lagrangian f(R) in the Jordan frame -- we start from a simple φ$^2$ potential in the Einstein frame and investigate the corresponding f(R) in the former picture. The addition of an ad-hoc Cosmological Constant in the Einstein frame leads to a thermodynamical interpretation of this physical system, which allows further insight on its (meta)stability and evolution.
Author
Sergio Jorás
(Universidade Federal do Rio de Janeiro – UFRJ)
