Quantum effects render black holes unstable. In addition to Hawking radiation, which leads to the prediction of an extraordinary lifetime for black holes, there is the possibility of quantum tunneling of the black hole geometry itself. I will provide a metric description of a black hole quantum tunneling into a white hole. To associate well-defined transition amplitudes with this tunneling it will be useful to introduce complex analysis into the usual semiclassical treatment of tunneling amplitudes. Transition amplitude calculations are currently incomplete, however, intriguing estimates indicate that black hole lifetimes could be shorter than previously thought and have led to speculative connections with the recently exciting and mysterious observations of Fast Radio Bursts.
Coffee: 2:30 pm, 241 Compton