Extremal and nonextremal Kerr/CFT correspondences

Details Extremal and nonextremal Kerr/CFT correspondences Extremal and nonextremal Kerr/CFT correspondences

2011-01-26

arxiv.org/abs/1101.5136v3

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

v3: missing term restored in eqn. (A.10) for central term; does not affect conclusions of this paper, but important in other c

Scientific paper

I rederive the Kerr/CFT correspondence without first taking the near-horizon extremal Kerr limit. This method extends easily to nonextremal black holes, for which the temperature and central charge behave poorly at the horizon but the entropy remains finite. A computation yields one-half of the standard Bekenstein-Hawking entropy, with hints that the other half may be related to a conformal field theory at the inner horizon. I then present an alternative approach, based on a stretched Killing horizon, in which the full entropy is obtained and the temperature and central charge remain well-behaved even in the nonextremal case.

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