Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

Unitarity seems to imply that quantum gravity effects must become relevant at the size of a black hole horizon. Mathur argued that many of the black hole microstates should be described semi-classically as supergravity globally hyperbolic solutions resembling the black hole geometry. If this proposal has been checked in great details for supersymmetric black holes, only very few such hyperbolic space-times describing non-extremal black holes have been constructed, and all of them carry total angular momenta that violate the black hole regularity bound. This failure is nonetheless to be expected, since constructing supersymmetric microstate geometries with physical angular momenta already required to consider multi-centre configurations in the scalling regime, in which the geometry becomes arbitrarily close to the one of the black hole itself. We have obtained a first example of multi-centre globally hyperbolic space-time with the asymptotics of a non-extremal Cvetic-Youm black hole in http://arxiv.org/abs/1511.03669, and we are currently working on a more general solution admitting a scalling regime. I shall describe these solutions and the intuition behind it toward the definition of such microstate geometries with angular momenta preserving the regularity bound