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Black hole entropy and the semiclassical approximation

1994/04/21 by Samir D. Mathur, Mathur, Samir D.
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Quantum Electrodynamics and Casimir Effect

paper · pdf · doi:10.48550/arxiv.hep-th/9404135

openalex publication_date 1994/04/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We compute the entropy of the Hawking radiation for an evaporating black hole, in 1+1 dimensions and in 3+1 dimensions. We investigate the validity of the semiclassical approximation for the evaporation process. It appears that there might be a large entropy of entanglement between the classical degrees of freedom describing the black hole and the radiation fields when the theory of quantum gravity plus matter is considered.

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