Regular Seminar Jorge Santos (University of Cambridge)
I will describe some counterexamples to (weak) cosmic censorship in anti-de Sitter spacetime that have been found recently. These are solutions in which the curvature grows without bound in a region of spacetime visible to infinity. I will also discuss a surprising connection between some of these counterexamples and an apparently unrelated conjecture called the weak gravity conjecture.
Regular Seminar Alberto Zaffaroni (INFN, Milan Bicocca U.)
Abstract: We define indices for topologically twisted supersymmetric theories from two to five dimensions. We apply them to the holographic study of AdS black holes, black strings and domain-walls across dimensions.
Regular Seminar Costantin Bachas (ENS Paris)
room G O Jones 610
I will first review the AdS4/SCFT3 correspondence with N=4 supersymmetry. I will then focus on two special aspects which are important in exploring the string landscape: (1) The existence of N=2 moduli and their fate in gauged supergravity; (2) Special degeneration limits for which the low-energy limit is a theory of bigravity or massive gravity.