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Morzine: David Wallace: The Black Hole Information Loss Problem
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Lecture given at the International Summer Institute in Philosophy of Physics on the Philosophy of Cosmology and the Philosophy of Quantum Gravity
Hosted by the University of Geneva – University of Illinois Chicago Cosmology Beyond Spacetime project
Morzine, France
26 June - 1 July 2022
Note: Some of the Q&A has low audio quality.
David Wallace: The Black Hole Information Loss Problem
Abstract: I distinguish between two versions of the black hole information-loss paradox. The first arises from apparent failure of unitarity on the spacetime of a completely evaporating black hole, which appears to be non-globally-hyperbolic; this is the most commonly discussed version of the paradox in the foundational and semipopular literature, and the case for calling it `paradoxical’ is less than compelling. But the second arises from a clash between a fully-statistical-mechanical interpretation of black hole evaporation and the quantum-field-theoretic description used in derivations of the Hawking effect. This version of the paradox arises long before a black hole completely evaporates, seems to be the version that has played a central role in quantum gravity, and is genuinely paradoxical.
Hosted by the University of Geneva – University of Illinois Chicago Cosmology Beyond Spacetime project
Morzine, France
26 June - 1 July 2022
Note: Some of the Q&A has low audio quality.
David Wallace: The Black Hole Information Loss Problem
Abstract: I distinguish between two versions of the black hole information-loss paradox. The first arises from apparent failure of unitarity on the spacetime of a completely evaporating black hole, which appears to be non-globally-hyperbolic; this is the most commonly discussed version of the paradox in the foundational and semipopular literature, and the case for calling it `paradoxical’ is less than compelling. But the second arises from a clash between a fully-statistical-mechanical interpretation of black hole evaporation and the quantum-field-theoretic description used in derivations of the Hawking effect. This version of the paradox arises long before a black hole completely evaporates, seems to be the version that has played a central role in quantum gravity, and is genuinely paradoxical.
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