Nonsingular two-dimensional black holes and classical string backgrounds
- California Institute of Technology, Pasadena, California 91125 (United States)
We study a string-inspired classical two-dimensional (2D) effective field theory with [ital nonsingular] black holes as well as Witten's black hole among its static solutions. By a dimensional reduction, the static solutions are related to the [SL(2,[ital R])[sub [ital k]][direct product]U(1)]/U(1) coset model, or more precisely its [ital O](([alpha][prime])[sup 0]) approximation known as the 3D charged black string. The 2D effective action possesses a propagating degree of freedom, and the dynamics are highly nontrivial. A collapsing shell is shown to bounce into another universe without creating a curvature singularity on its path, and the potential instability of the Cauchy horizon is found to be irrelevant in that some of the infalling observers never approach the Cauchy horizon. Finally an SL(2,[ital R])[sub [ital k]]/U(1) nonperturbative coset metric, found and advocated by Dijkgraaf [ital et] [ital al]., is shown to be nonsingular and to coincide with one of the charged spacetimes found above. The implications of all these geometries are discussed in connection with black-hole evaporation.
- DOE Contract Number:
- AC03-81ER40050
- OSTI ID:
- 6244827
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Vol. 48:6; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BLACK HOLES
SINGULARITY
TWO-DIMENSIONAL CALCULATIONS
FIELD EQUATIONS
INSTABILITY
QUANTUM FIELD THEORY
SPACE-TIME
STRING MODELS
COMPOSITE MODELS
EQUATIONS
EXTENDED PARTICLE MODEL
FIELD THEORIES
MATHEMATICAL MODELS
PARTICLE MODELS
QUARK MODEL
662110* - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)