Hawking Radiation As Tunneling
Phys. Rev. Lett. 85, 5042 – Published 11 December, 2000
DOI: https://doi.org/10.1103/PhysRevLett.85.5042
Abstract
We present a short and direct derivation of Hawking radiation as a tunneling process, based on particles in a dynamical geometry. The imaginary part of the action for the classically forbidden process is related to the Boltzmann factor for emission at the Hawking temperature. Because the derivation respects conservation laws, the exact spectrum is not precisely thermal. We compare and contrast the problem of spontaneous emission of charged particles from a charged conductor.