Published February 24, 2006
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Precision microstate counting of small black rings
Abstract
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 nonspinning 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 timelike curves be absent.
Additional Information
©2006 The American Physical Society. Received 4 December 2005; published 23 February 2006. We are very grateful to Ashoke Sen for numerous illuminating discussions and collaboration on Ref. [44]. A.D. would like to thank the high energy group at ASICTP, Trieste for their hospitality where part of this work was completed. The work of M. S. was supported in part by Department of Energy Grant No. DE-FG03-92ER40701 and the Sherman Fairchild Foundation.Files
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- Eprint ID
- 4497
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- CaltechAUTHORS:DABprl06
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2006-08-25Created from EPrint's datestamp field
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