High Energy Physics Seminar

We discuss recent applications of Euclidean path integrals to the black hole information problem. In calculations with replica wormholes as the next-to-leading order correction to the Gibbons-Hawking saddlepoint, the radiation density matrix approaches a pure state at
late times, following the Page curve. We compare unitary evaporation of black holes (in real time), mediated by calculable quantum hair effects, with the replica wormhole results. Both replica wormhole and quantum hair approaches imply that radiation states are macroscopic
superpositions of spacetime backgrounds, invalidating firewall and monogamy of entanglement constructions.

The talk is in 469 Lauritsen.

Contact [email protected] for Zoom link.