More on Four-Dimensional Extremal Black Holes

Details More on Four-Dimensional Extremal Black Holes More on Four-Dimensional Extremal Black Holes

1996-06-02

arxiv.org/abs/hep-th/9605236v1

Phys.Rev. D54 (1996) 5129-5134

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, using Latex, no figures

Scientific paper

10.1103/PhysRevD.54.5129

We consider an embedding of the extremal four-dimensional Reissner-Nordstr\"om black hole into type $IIB$ string theory. The equivalent type $IIB$ configuration, in the D-brane weak-coupling picture, is a bound state of D1- and D5-branes threaded by fundamental type $IIB$ strings. The bound state involves also a NSNS solitonic 5-brane, mimicking the role of the Kaluza-Klein magnetic monopole. The statistical entropy derived by counting the degeneracy of the BPS-saturated excitations of this bound state agrees perfectly with the (semiclassical) Bekenstein-Hawking formula.

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