Soft hairy warped black hole entropy

Abstract

We reconsider warped black hole solutions in topologically massive gravity and find novel boundary conditions that allow for soft hairy excitations on the horizon. To compute the associated symmetry algebra we develop a general framework to compute asymptotic symmetries in any Chern-Simons-like theory of gravity. We use this to show that the near horizon symmetry algebra consists of two u(1) current algebras and recover the surprisingly simple entropy formula $S=2\pi (J_0^{+}+J_0^{-})$, where $J_0^{\pm }$ are zero mode charges of the current algebras. This provides the first example of a locally non-maximally symmetric configuration exhibiting this entropy law and thus non-trivial evidence for its universality.

24pp, v2: added appendix C and minor edits

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Cited by in corpus (13)

• Spacetime structure near generic horizons and soft hair
• Black Hole Entropy and Soft Hair
• Towards a bulk description of higher spin SYK
• Chiral Massive News: Null Boundary Symmetries in Topologically Massive Gravity
• Warped Symmetries of the Kerr Black Hole
• On asymptotic charges in 3D gravity
• Supertranslation Hair of Schwarzschild Black Hole: A Wilson Line Perspective
• Metric formulation of the simple theory of 3d massive gravity
• On-shell versus Off-shell Equivalence in 3D Gravity
• A remarkably simple theory of 3d massive gravity
• Warped Flatland
• Near Horizon Symmetry and Entropy Formula for Kerr-Newman (A)dS Black Holes
• Near horizon symmetry of extremal spacelike-stretched black holes