Date:
23. November 2018 - 12:00
Speaker:
Michele Oliosi (Yukawa Institute for Theoretical Physics)
In this talk, I will present two specific modifications of gravity in
which the number of degrees of freedom is minimized. I will focus on
their construction, showing how different methods can be used to
accomplish the same goal, i.e. keeping a low number of degrees of
freedom. The first theory that I will describe is the minimal theory of
quasidilaton massive gravity, a Lorentz-breaking theory of massive
gravity + scalar field. As a second example, I will describe a class of
modified gravity theories that propagate only the usual two
polarizations of gravitational waves.