Covariant path integrals and black holes
arXiv:gr-qc/9710050
Abstract
The thermal nature of the propagator in a collapsed black-hole spacetime is shown to follow from the non-trivial topology of the configuration space in tortoise coordinates by using the path integral formalism.
5 pages, Revtex, 1 figure. To appear in the proceedings of the Eighth Marcel Grossmann Meeting on General Relativity. (Jerusalem, Israel, June 1997)