Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-07-11
Phys.Rev.D48:5769-5777,1993
Physics
High Energy Physics
High Energy Physics - Theory
18 pages plus 4 figures in a separate uuencoded file
Scientific paper
10.1103/PhysRevD.48.5769
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.
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