A brief history of Hawking’s information paradox

Calmet, Xavier and Hsu, Stephen D H (2022) A brief history of Hawking’s information paradox. European Physical Society Letters (EPL), 139 (4). pp. 1-5. ISSN 0295-5075

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In this invited review, we describe Hawking’s information paradox and a recently proposed resolution of it. Explicit calculations demonstrate the existence of quantum hair on black holes, meaning that the quantum state of the external graviton field depends on the internal state of the black hole. Simple quantum mechanics then implies that Hawking radiation amplitudes depend on the internal state, resulting in a pure final radiation state that preserves unitarity and, importantly, violates a factorization assumption which is central to the original paradox. Black hole information is encoded in entangled macroscopic superposition states of the radiation.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 19 Jul 2022 15:19
Last Modified: 18 Aug 2022 14:15
URI: http://sro.sussex.ac.uk/id/eprint/107014

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