Generalized Quantum Theory and Black Hole Evaporation

Details Generalized Quantum Theory and Black Hole Evaporation Generalized Quantum Theory and Black Hole Evaporation

1998-08-26

arxiv.org/abs/gr-qc/9808070v1

in Black Holes and High Energy Astrophysics, ed by H. Sato and N. Sugiyama, Universal Academy Press, Tokyo, 1998.

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, ReVTeX, 5 figures

Scientific paper

Usually quantum theory is formulated in terms of the evolution of states through spacelike surfaces. However, a generalization of this formulation is needed for field theory in spacetimes not foliable by spacelike surfaces, or in quantum gravity where geometry is not definite but a quantum variable. In particular, a generalization of usual quantum theory is needed for field theory in the spacetimes that model the process of black hole evaporation. This paper discusses a spacetime generalization of usual quantum theory that is applicable to evaporating black hole spacetimes. In this generalization, information is not lost in the process of evaporation. Rather, complete information is distributed about four-dimensional spacetime. Black hole evaporation is thus not in conflict with the principles of quantum theory when suitably generally stated. (Talk presented at the 49th Yamada Conference: Black Holes and High Energy Astrophysics, Kyoto Japan, April 7-10, 1998.)

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