Non-Singularity of the Exact Two-Dimensional String Black Hole

Details Non-Singularity of the Exact Two-Dimensional String Black Hole Non-Singularity of the Exact Two-Dimensional String Black Hole

1993-02-09

arxiv.org/abs/hep-th/9302037v2

Phys.Rev.Lett. 70 (1993) 2669-2672

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, latex, DAMTP R93/1

Scientific paper

10.1103/PhysRevLett.70.2669

We study the global structure of the exact two-dimensional space-time which emerges from string theory. Previous work has shown that in the semi-classical limit, this is a black hole similar to the Schwarzschild solution. However, we find that in the exact case, a new Euclidean region appears "between" the singularity and black hole interior. However the boundary between the Lorentzian and Euclidean regions is a coordinate singularity, which turns out to be a surface of time reflection symmetry in an extended space-time. Thus strings having fallen through the black hole horizon would eventually emerge through another one into a new asymptotically flat region. The maximally extended space-time consists of an infinite number of universes connected by wormholes. There are no singularities present in this geometry. We also calculate the mass and temperature associated with the space-time.

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