Vendredi 19 février 2016 à 14h15

Auditoire Stueckelberg, Ecole de Physique

### Advantages, novelties and surprises in 2+1 dimensional gravity

**Alejandra Castro**, University of Amsterdam

###### Three dimensional gravity has the potential to be an exactly solvable model of quantum gravity. It has also shown to provide novel insight to the fundamental mechanics behind holography. I will overview recent progress on non-perturbative aspects of these theories with emphasis on black holes. In particular, I will review the relation between Chern-Simons theory and 3D gravity, which provides an interesting arena to explore locality in quantum gravity--and the lack of it. Entanglement is an important clue to understanding holography; the last portion of the talk will focus on how to formulate entanglement entropy for these theories and some interesting applications of these new developments