July 9, 2020 to January 31, 2025
Europe/Zurich timezone

Minimalism in modified gravity

May 25, 2021, 2:00 PM


Prof. Shinji Mukohyama (YITP)


It is generally believed that modification of general relativity inevitably introduces extra physical degree(s) of freedom. In this talk I argue that this is not the case by constructing modified gravity theories with two local physical degrees of freedom. After classifying such theories into two types, I show explicit examples and discuss their cosmology and phenomenology, such as possible amelioration of the H0 tension and stable massive gravity/bigravity cosmology.

Presentation materials