Precision Microstate Counting of Small Black Rings

Details Precision Microstate Counting of Small Black Rings Precision Microstate Counting of Small Black Rings

2005-11-10

arxiv.org/abs/hep-th/0511120v2

Phys.Rev.Lett. 96 (2006) 071601

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, LaTeX, references added

Scientific paper

10.1103/PhysRevLett.96.071601

We examine certain two-charge supersymmetric states with spin in five-dimensional string theories which can be viewed as small black rings when the gravitational coupling is large. Using the 4D-5D connection, these small black rings correspond to four-dimensional non-spinning small black holes. Using this correspondence, we compute the degeneracy of the microstates of the small black rings exactly and show that it is in precise agreement with the macroscopic degeneracy to all orders in an asymptotic expansion. Furthermore, we analyze the five-dimensional small black ring geometry and show qualitatively that the Regge bound arises from the requirement that closed time-like curves be absent.

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