Encontros Iberian Strings 

19/01/2017, 17:30 — 18:00 — Anfiteatro Abreu Faro
José Edelstein, University of Santiago de Compostela

Causality in $3D$ massive gravity theories

We study the constraints coming from local causality requirement in various $2+1$ dimensional dynamical theories of gravity. We show that causality and unitarity are compatible with each other and they both require the Newton constant to be negative. This is in contrast with what happens in the higher dimensional case. We discuss the reasons behind this result.