Dynamical evaporation of quantum horizons

• Published in: Classical and quantum gravity Vol. 30; no. 16; pp. 165004 - 25
• Main Author: Pranzetti, Daniele
• Format: Journal Article
• Language: English
• Published: IOP Publishing 21.08.2013
• Subjects: Hawking radiation; information paradox; loop quantum gravity; quantum black hole
• ISSN: 0264-9381; 1361-6382
• DOI: 10.1088/0264-9381/30/16/165004

We describe the black hole evaporation process driven by the dynamical evolution of the quantum gravitational degrees of freedom resident at the horizon, as identified by the loop quantum gravity kinematics. Using a parallel with the Brownian motion, we interpret the first law of the quantum-dynamical horizon in terms of a fluctuation-dissipation relation applied to this fundamental discrete structure. In this way, the horizon evolution is described in terms of relaxation to an equilibrium state balanced by the excitation of Planck scale constituents of the horizon. We investigate the final stage of the evaporation process and show how, from this setting, the emergence of several conservative scenarios for the information paradox can be microscopically derived. Namely, the leakage of part of the horizon quantum geometry information prior to the Planckian phase and the stabilization of the hole surface shrinkage forming a massive remnant, which can eventually decay, are described.