Strings as Solitons & Black Holes as Strings

Details Strings as Solitons & Black Holes as Strings Strings as Solitons & Black Holes as Strings

1995-11-08

arxiv.org/abs/hep-th/9511053v1

Nucl.Phys. B474 (1996) 85-121

Physics

High Energy Physics

High Energy Physics - Theory

52 pages, harvmac (b)

Scientific paper

10.1016/0550-3213(96)00266-0

Supersymmetric closed string theories contain an infinite tower of BPS-saturated, oscillating, macroscopic strings in the perturbative spectrum. When these theories have dual formulations, this tower of states must exist nonperturbatively as solitons in the dual theories. We present a general class of exact solutions of low-energy supergravity that corresponds to all these states. After dimensional reduction they can be interpreted as supersymmetric black holes with a degeneracy related to the degeneracy of the string states. {}For example, in four dimensions we obtain a point-like solution which is asymptotic to a stationary, rotating, electrically-charged black hole with Regge-bounded angular momentum and with the usual ring-singularity replaced by a string source. This further supports the idea that the entropy of supersymmetric black holes can be understood in terms of counting of string states. We also discuss some applications of these solutions to string duality.

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