A near-NHEK/CFT correspondence

Apr, 2010
11 pages
Published in:
  • Int.J.Mod.Phys.A 25 (2010) 5517-5527
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Abstract: (arXiv)
We consider excitations around the recently introduced near-NHEK metric describing the near-horizon geometry of the near-extremal four-dimensional Kerr black hole. This geometry has a U(1)_L x U(1)_R isometry group which can be enhanced to a pair of commuting Virasoro algebras. We present boundary conditions for which the conserved charges of the corresponding asymptotic symmetries are well defined and non-vanishing and find the central charges c_L=12J/hbar and c_R=0 where J is the angular momentum of the black hole. Applying the Cardy formula reproduces the Bekenstein-Hawking entropy of the black hole. This suggests that the near-extremal Kerr black hole is holographically dual to a non-chiral two-dimensional conformal field theory.
Note:
  • 11 pages, v2: references updated, added
  • Kerr/CFT correspondence
  • black holes
  • black hole: Kerr
  • black hole: entropy
  • field theory: conformal
  • black hole: angular momentum
  • black hole: holography
  • charge: conservation law
  • duality: holography
  • algebra: Virasoro