Near horizon dynamics of three dimensional black holes
Abstract
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.
Keywords
Cite
@article{arxiv.1906.10694,
title = {Near horizon dynamics of three dimensional black holes},
author = {Daniel Grumiller and Wout Merbis},
journal= {arXiv preprint arXiv:1906.10694},
year = {2020}
}
Comments
30pp, v2: added refs. and remark in discussion section, v3: extended and corrected first two paragraphs in section 2.2 and added last paragraph on near horizon nomenclature in section 2.3, v4: extended analysis to include dynamical holonomy