HackerPapers

arXiv:1511.08221hep-th

Hawking radiation, the Stefan-Boltzmann law, and unitarization

Steven B. Giddings

Early discovery. Linked by one identifiable commenter. This paper is outside the main ranking; a mention is not an endorsement.

Abstract

Where does Hawking radiation originate? A common picture is that it arises from excitations very near or at the horizon, and this viewpoint has supported the "firewall" argument and arguments for a key role for the UV-dependent entanglement entropy in describing the quantum mechanics of black holes. However, closer investigation of both the total emission rate and the stress tensor of Hawking radiation supports the statement that its source is a near-horizon quantum region, or "atmosphere," whose radial extent is set by the horizon radius scale. This is potentially important, since Hawking radiation needs to be modified to restore unitarity, and a natural assumption is that the scales relevant to such modifications are comparable to those governing the Hawking radiation. Moreover, related discussion suggests a resolution to questions regarding extra energy flux in "nonviolent" scenarios, that does not spoil black hole thermodynamics as governed by the Bekenstein-Hawking entropy.

arXiv comments
7 pages + references. v2: references added, v3: minor typos corrected. To appear in Physics Letters
Journal reference
DOI
doi:10.1016/j.physletb.2015.12.076
Subjects
hep-thHigh Energy Physics, Theory gr-qcGeneral Relativity and Quantum Cosmology

On Hacker News

Linked by 1 identifiable commenter in 4 comments across 4 threads, from Oct 2018 to Mar 2024.

Comments linking this paper, per year.

Discussed in comments4 threads

  1. Gravitational Collapse of Spongebob 1 comment

    • > Hawking radiation is due to process outside the black hole. Hm, yes, the Hawking quanta originate outside the event horizon, and not very nearby outside either (Giddings 2015 <https://arxiv.org/abs/1511.08221>, Unruh "Dumb Holes" 2007…

      raattgiftView on HNParent context

  2. Dark energy from supermassive black holes? Physicists spar over radical idea 1 comment

    • > I'm sure it's wrong in important ways I'm afraid so. I'll just pick on two important ways found in one of your key sentences, and I'll stick to widely accepted results from Hawking, Unruh, Gibbons and Giddings. > Particles at the edge of the sphere are able to leak back into…

      raattgiftView on HNParent context

  3. Stephen Hawking’s Final Paper: How to Escape from a Black Hole 1 comment

    • > more response than I was expecting, thank you. You're welcome. > evaporating black hole must be leaking its information to somewhere The information about the contents of the BH during its formation and growth is in the region of strong gravity. Classically, it's squashed into…

      raattgiftView on HNParent context

  4. Physicists investigate why matter and antimatter are not mirror images 1 comment

    • > But there's nothing that stops it, say, eating protons and spitting out positrons later Oh, I see what you mean, but it's not clearly because of symmetries breaking inside the horizon, rather than high-energy pairs taking energy from the background. Semiclassically: collapse…

      raattgiftView on HNParent context

Submitted to Hacker News

Connected through shared HN threads, not inferred similarity or a recommendation.