Heidelberg 2022 – wissenschaftliches Programm

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AGPhil: Arbeitsgruppe Philosophie der Physik

AGPhil 3: Black Holes I

AGPhil 3.1: Vortrag

Dienstag, 22. März 2022, 11:30–12:00, AGPhil-H14

No membrane at the black hole horizon? — •Marco Sanchioni — Via Timoteo Viti 10, Department of Pure and Applied Sciences, University of Urbino, Italy

Since the discovery of Hawking radiation (Hawking, 1976), it has been ac- accepted among physicists, and later on also by philosophers (Wallace, 2018), that black holes are thermodynamic objects in the total sense. To have a statistical mechanical underpinning of black hole thermodynamics, as is the case for thermodynamics of ordinary things, it has been argued that a quantum membrane should be posited at the black hole horizon. This paper is an inquiry on the status of the quantum membrane paradigm in light of recent theoretical results on black hole physics obtained within the research program of semiclassical gravity (Penington et al., 2019; Almheiri et al., 2020) and ultimately grounded on the ER=EPR proposal (Maldacena and Susskind, 2013). However, we do not discuss the problematic aspect of such a research program, which would be a project on its own, and our result is thus conditional to its validity. In particular, the paper starts an investigation on the picture of black holes that underlies these new calculations. The main result of this paper is that, within the central assumption on the validity of semiclassical gravity, the quantum membrane paradigm should be abandoned.