2015/11/30 by Javad Koohbor, Mohammad Nouri-Zonoz, M. Nouri-Zonoz +1
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Curvature #Entropy (arrow of time) #Geometry #Gravitation #Hawking #Mathematics #Observer (physics) #Physics #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum gravity #Quantum mechanics #Semiclassical physics #Spacetime #Theoretical physics #Unitarity #gr-qc #hep-th
paper · pdf · doi:10.1088/2399-6528/aab8e0
published in Journal of Physics Communications 2(4), 045027 (IOP Publishing) · 41 pages, Replaced with the published version
openalex created_date 2017/06/15 · openalex publication_date 2018/03/22 · arxiv created 2018/04/24 · arxiv updated 2018/04/26 · openalex updated_date 2026/08/06
Based on an observer-centric methodology , we pinpoint the basic origin of the spectral Planckianity of the asymptotic Hawking modes in the conventional treatments of the evaporating horizons. By considering an observer who analyzes a causal horizon in a generic spacetime, we first clarify how the asymptotic Planckian spectrum is imposed on the exponentially redshifted Hawking modes through a geometric dispersion mechanism developed by a semiclassical environment which is composed by all the modes that build up the curvature of the causal patch of the asymptotic observer. We also discuss the actual microscopic phenomenon of the Hawking evaporation of generic causal horizons. Our quantum description is based on a novel holographic scheme of gravitational open quantum systems in which the degrees of freedom that build up the curvature of the observer's causal patch interact with the radiated Hawking modes, initially as environmental quanta, and after a crossover time, as quantum defects. Planckian dispersion of the modes would only be developed in the strict thermodynamic limit of this quantum environment, called optimal disperser , which is nevertheless avoided holographically. Finally, we outline and characterize how our microscopic formulation of the observer-centric holography, beyond the AdS/CFT examples and for generic causal patches, does realize the information-theoretic processing of unitarity.