Massive Gravity Theories in 3-Dimensions

by Sadik Deger (Bogazici University, Istanbul)

Friday 22 Mar 2024, 14:30 → 15:30 Europe/Rome

I will first explain a systematic way of constructing massive

gravity theories in 3-dimensions which are free of scalar ghosts such as

"Topologically Massive Gravity" and "New Massive Gravity". Then, I will

focus on the so called "third way consistent" models whose primary example

is the "Minimal Massive Gravity" (MMG). Field equations of such models

cannot be derived from a standard action principle of the metric alone,

yet they are still on-shell consistent. MMG is distinguished by the fact

that around one of its Anti-de Sitter vacuum both bulk and boundary

unitarity can be achieved unlike most other massive gravities. I will show

how MMG fits to the construction described at the beginning and discuss

some of its properties and extensions. (Talk is based on: arXiv:1909.06305,

arXiv:2002.07592, arXiv:2109.04339, arXiv:2312.12387.)