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Title:	Extremal Limits and Black Hole Entropy
Author:	Randall, Lisa; Johnson, Matthew; Carroll, Sean Note: Order does not necessarily reflect citation order of authors.
Citation:	Carroll, Sean, Matthew C. Johnson, and Lisa Randall. 2009. Extremal limits and black hole entropy. Journal of High Energy Physics 2009(11): 109.
Full Text & Related Files:	0901.0931v2.pdf (215.6Kb; PDF)
Abstract:	Taking the extremal limit of a non-extremal Reissner-Nordstrom black hole (by externally varying the mass or charge), the region between the inner and outer event horizons experiences an interesting fate--while this region is absent in the extremal case, it does not disappear in the extremal limit but rather approaches a patch of \(AdS_2 \times S^2\). In other words, the approach to extremality is not continuous, as the non-extremal Reissner-Nordstrom solution splits into two spacetimes at extremality: an extremal black hole and a disconnected \(AdS\) space. We suggest that the unusual nature of this limit may help in understanding the entropy of extremal black holes.
Published Version:	doi:10.1088/1126-6708/2009/11/109
Other Sources:	http://arxiv.org/abs/0901.0931
Terms of Use:	This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page:	http://nrs.harvard.edu/urn-3:HUL.InstRepos:8015828

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  Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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