Space-time Geometry in Exactly Solvable Quantum Dilaton Gravity

Details Space-time Geometry in Exactly Solvable Quantum Dilaton Gravity Space-time Geometry in Exactly Solvable Quantum Dilaton Gravity

1993-10-23

arxiv.org/abs/hep-th/9310156v2

Phys.Rev. D50 (1994) 3889-3912

Physics

High Energy Physics

High Energy Physics - Theory

LATEX file 49 pages. UT-Komaba 93-19. 4 figures in postscript

Scientific paper

10.1103/PhysRevD.50.3889

We describe in detail how one can extract space-time geometry in an exactly solvable model of quantum dilaton gravity of the type proposed by Callan, Giddings, Harvey and Strominger ( CGHS ). Based on our previous work, in which a model with 24 massless matter scalars was quantized rigorously in BRST operator formalism, we compute, without approximation, mean values of the matter stress-energy tensor, the inverse metric and some related quantities in a class of coherent physical states constructed in a specific gauge within the conformal gauge. Our states are so designed as to describe a variety of space-time in which in-falling matter energy distribution produces a black hole with or without naked sigularity. In particular, we have been able to produce the prototypical configuration first discovered by CGHS, in which a ( smeared ) matter shock wave produces a black hole without naked sigularity.

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