The subtle unphysical hypothesis of the firewall theorem

Abstract

The black-hole firewall theorem derives a suspicious consequence (large energy-momentum density on the horizon of a black hole) from a set of seemingly reasonable hypotheses. I point out the hypothesis which is likely to be unrealistic---a hypothesis not always sufficiently made explicit--- and discuss the subtle confusion at its origin: mixing-up of two different notions of entropy and misusing of the entropy bound.

6 pages, 2 figures. Revision:minor editing and important references added

References in corpus (5)

• Quantum Extension of the Kruskal Space-time
• White Holes as Remnants: A Surprising Scenario for the End of a Black Hole
• How big is a black hole?
• Fast Radio Bursts and White Hole Signals
• Small black/white hole stability and dark matter

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• On the geometry of the black-to-white hole transition within a single asymptotic region
• Bouncing compact objects I: Quantum extension of the Oppenheimer-Snyder collapse
• Black to white transition of a charged black hole
• Diffuse emission from black hole remnants
• The Devil in the (Implicit) Details. On the AMPS Paradox and its Resolution
• Unitarity and the information problem in an explicit model of black hole evaporation
• On the Origin of Black Hole Paradoxes