Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-11-03
Phys.Rev.D47:4233-4238,1993
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, 2 figures upon request, CALT-68-1833 - (new version corrects omissions in previous list of references)
Scientific paper
10.1103/PhysRevD.47.4233
Extremal black holes are studied in a two dimensional model motivated by a dimensional reduction from four dimensions. Their quantum corrected geometry is calculated semiclassically and a mild singularity is shown to appear at the horizon. Extensions of the geometry past the horizon are not unique but there are continuations free from malevolent singularities. A few comments are made about the relevance of these results to four dimensions and to the study of black hole entropy and information loss.
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