White Holes, Black Holes and Cpt in Two Dimensions

Abstract

It is argued that a unitarity-violating but weakly CPT invariant superscattering matrix exists for leading-order large-$N$ dilaton gravity, if and only if one includes in the Hilbert space planckian ``thunderpop" excitations which create white holes. CPT apparently cannot be realized in a low-energy effective theory in which such states have been integrated out. Rules for computing the leading-large-$N$ superscattering are described in terms of quantum field theory on a single multiply-connected spacetime obtained by sewing the future (past) horizons of the original spacetime with the past (future) horizons of its CPT conjugate. Some difficulties which may arise in going beyond leading order in $1/N$ are briefly discussed.

18 pages plus 4 figures in a separate uuencoded file

References in corpus (12)

• Evanescent Black Holes
• The Endpoint of Hawking Evaporation
• Black Hole Evaporation in the Presence of a Short Distance Cutoff
• Liouville Models of Black Hole Evaporation
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• Quantum Emission from Two-Dimensional Black Holes
• Quantization of a Theory of 2d Dilaton Gravity
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Cited by in corpus (8)

• Black hole thermodynamics and information loss in two dimensions
• Universality and Scaling at the Onset of Quantum Black Hole Formation
• The Problem of Time and Quantum Black Holes
• On the Hawking effect
• Evaporating Black Holes and Entropy
• The Superscattering Matrix for Two Dimensional Black Holes
• Lessons of Quantum 2D Dilaton Gravity
• Indications against dynamical CPT symmetry restoration in quantum gravity