Firewalls as artefacts of inconsistent truncations of quantum geometries

by Dr Cristiano Germani (MPP Munich, Germany)

Thursday 12 Mar 2015, 11:15 → 12:15 Europe/Berlin

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In this talk I will argue that: a) firewalls inexorably appear at the Page time under the assumption that semiclassical black holes are unitarized by perturbative effects of order $e^{-S}$, where $S$ is the entropy of the system; b) firewalls do not appear when semiclassical black holes are non-perturbatively unitarized. I will then show that a) is simply a manifestation of an inconsistent truncation of non-perturbative effects that unitarize the semiclassical black hole. Thus, I will conclude that the appearance of firewalls is just a signal of the breaking of the semiclassical approximation at the Page time, even for large black holes.