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arXiv · 1701.06161

The black hole quantum atmosphere

Ramit Dey·Stefano Liberati·Daniele Pranzetti
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Abstract

Ever since the discovery of black hole evaporation, the region of origin of the radiated quanta has been a topic of debate. Recently it was argued by Giddings that the Hawking quanta originate from a region well outside the black hole horizon by calculating the effective radius of a radiating body via the Stefan--Boltzmann law. In this paper we try to further explore this issue and end up corroborating this claim, using both a heuristic argument and a detailed study of the stress energy tensor. We show that the Hawking quanta originate from what might be called a quantum atmosphere around the black hole with energy density and fluxes of particles peaked at about $4M$, running contrary to the popular belief that these originate from the ultra high energy excitations very close to the horizon. This long distance origin of Hawking radiation could have a profound impact on our understanding of the information and transplanckian problems.

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Ramit Dey, Stefano Liberati, Daniele Pranzetti. 2017-01-22. The black hole quantum atmosphere. https://doi.org/10.1016/j.physletb.2017.09.076

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