Heidelberg 2022 – wissenschaftliches Programm

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AGPhil: Arbeitsgruppe Philosophie der Physik

AGPhil 5: Black Holes II

AGPhil 5.2: Hauptvortrag

Dienstag, 22. März 2022, 17:00–17:45, AGPhil-H14

When is a black hole spacetime ``as large as it can be''? — •Juliusz Doboszewski — University of Bonn (Lichtenberg Group for History and Philosophy of Physics) — Black Hole Initiative, Harvard University

Multiple conditions have been proposed in the literature aiming at capturing the idea that a general relativistic spacetime is "as large as it can be". I will consider some of them in the context of particular black hole spacetimes, including standard solutions, regular black holes, and fully evaporating black holes. The emerging landscape is not just subtle but also surprising. Interesting connections arise between these issues and certain versions of the cosmic censorship conjecture. Philosophical consequences involve a notion of a time machine and impact the viability of metaphysical principles such as the principle of sufficient reason.