Nonsingular transition from an evaporating black hole to a white hole

          @misc{ pirsa_PIRSA:19090009,
            doi = {10.48660/19090009},
            url = {https://pirsa.org/19090009},
            author = {Bardeen, James},
            keywords = {Cosmology, Particle Physics, Strong Gravity},
            language = {en},
            title = {Nonsingular transition from an evaporating black hole to a white hole},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {sep},
            note = {PIRSA:19090009 see, \url{https://pirsa.org}}
          }
          

Abstract

A "quasi-classical" picture of the transition from an evaporating black hole to a white hole is described, which is based on a resolution of the Schwarzschild singularity suggested by loop quantum gravity. All quantum information trapped by the black hole is eventually released from the white hole, without any Cauchy horizons, consistent with unitarity. The effective stress-energy tensor suggests that inflow of negative energy associated with Hawking "partners" in the interior of the black hole becomes, at least initially, an outflow of negative energy from the white hole. Alternative scenarios for the further evolution of the white hole and their implications will be discussed.