2013/02/05 by Baocheng Zhang, Qing-yu Cai, Ming-sheng Zhan +2 · 15 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Black hole (networking) #Black hole information paradox #Computer science #Cosmology and Gravitation Theories #Electromagnetic spectrum #Entropy (arrow of time) #Gravitation #Hawking #Hawking radiation #Micro black hole #Physics #Quantum Electrodynamics and Casimir Effect #Quantum electrodynamics #Quantum mechanics #Schwarzschild radius #Spectrum (functional analysis) #Theoretical physics #Thermal #Thermodynamics #gr-qc #hep-th #quant-ph
paper · pdf · doi:10.1103/physrevd.87.044006
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 87(4) (American Physical Society) · Published version. 6 figures
openalex publication_date 2013/02/05 · arxiv created 2013/02/06 · arxiv updated 2013/02/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Information about the collapsed matter in a black hole will be lost if Hawking radiations are truly thermal. Recent studies discover that information can be transmitted from a black hole by Hawking radiations, due to their spectrum deviating from exact thermality when backreaction is considered. In this paper, we focus on the spectroscopic features of Hawking radiation from a Schwarzschild black hole, contrasting the differences between the nonthermal and thermal spectra. Of great interest, we find that the energy covariances of Hawking radiations for the thermal spectrum are exactly zero, while the energy covariances are nontrivial for the nonthermal spectrum. Consequently, the nonthermal spectrum can be distinguished from the thermal one by counting the energy covariances of successive emissions, which provides an avenue towards experimentally testing the long-standing ``information loss paradox.''