Globally hyperbolic evaporating black hole and the information loss issue

2024/02/29 by Juan V. O. Pêgas, André G. S. Landulfo, George E. A. Matsas +1 · 1 voice · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Black hole (networking) #Classical mechanics #Cosmology and Gravitation Theories #Physics #Theoretical physics #gr-qc

paper · pdf · doi:10.1088/1361-6382/adb534

arxiv published 2024/02/29 · openalex publication_date 2025/02/12 · arxiv updated 2025/02/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/02

Abstract

Abstract We discuss the information loss issue for completely evaporating black holes in the context of a globally hyperbolic spacetime that maintains unchanged the entire semiclassical picture except for the ‘last evaporation breath,’ which pertains to full quantum gravity. Even though observers outside the black hole cannot access information that enters the horizon, there is no actual loss of information imposed by the spacetime causal structure since it is carried over from one Cauchy surface to the next (provided the local evolution is unitary).

Citations

• Domain of Dependence
• Hidden messenger revealed in Hawking radiation: A resolution to the paradox of black hole information loss
• Naked and thunderbolt singularities in black hole evaporation
• Semiclassical approach to black hole evaporation
• Particle creation by black holes
• Hawking Radiation as Tunneling
• The entropy of Hawking radiation

Cited by

• A generalization of the Fredenhagen-Haag derivation of Hawking radiation for a class of Vaidya space-times

Discussions

• Is there a limit on how fast a black hole can evaporate? The most conservative answer is that we don't know. This is an open question in physics, and our calculations get less and less reliable as the [stackexchange, 3 points]

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