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arxiv 1906.10694 v4 pith:N6QJI7R7 submitted 2019-06-25 hep-th gr-qc

Near horizon dynamics of three dimensional black holes

classification hep-th gr-qc
keywords horizonnearscalarblackboundaryconditionsdimensionalfield
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We perform the Hamiltonian reduction of three dimensional Einstein gravity with negative cosmological constant under constraints imposed by near horizon boundary conditions. The theory reduces to a Floreanini-Jackiw type scalar field theory on the horizon, where the scalar zero modes capture the global black hole charges. The near horizon Hamiltonian is a total derivative term, which explains the softness of all oscillator modes of the scalar field. We find also a (Korteweg-de Vries) hierarchy of modified boundary conditions that we use to lift the degeneracy of the soft hair excitations on the horizon.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    Exact finite-cutoff radial flow in 3D gravity realizes T̄T deformation, boundary dynamics is integrable via inverse scattering, but the radial flow itself is non-Hamiltonian.

  2. Dimensional reduction of AdS3 Chern-Simons gravity: Schwarzian and affine boundary theories

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    Symmetry reduction of 3D AdS Chern-Simons gravity on toroidal boundary yields two inequivalent 1D boundary theories: standard Schwarzian and affine-deformed Schwarzian with Kac-Moody extensions.

  3. Strings near BTZ black holes: A Carrollian Chronicle

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    The paper classifies families of closed bosonic string solutions in the near-horizon non-extremal BTZ spacetime and identifies novel features via string-Carroll expansion.

  4. Integrability in Three-Dimensional Gravity: Eigenfunction-Forced KdV Flows

    hep-th 2025-10 unverdicted novelty 6.0

    Derives forced KdV equation from Chern-Simons 3D gravity with chiral boundaries, with forcing set by Schrödinger eigenfunctions, and solves reflectionless and radiative sectors via inverse scattering.