Physics at the horizon: Mind the Cap! by Dr. Iosif Bena

Einstein’s General Relativity applied to black holes appears to lead to Information loss, thus violating one of the fundamental tenets of Quantum Mechanics. Recent Quantum-Information-Theory-based arguments imply that information loss can only be avoided if at the scale of the black hole horizon there exists a structure (commonly called fuzzball or firewall) that allows information to escape. I will discussed the highly-unusual properties that this structure must have and how these properties emerge in the realization of this structure in String Theory via branes, fluxes, topology and enhanced quantum tunneling.