Quantum hair and black hole information

Calmet, Xavier and Hsu, Stephen D H (2022) Quantum hair and black hole information. Physics Letters B. a136995. ISSN 0370-2693

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It has been shown that the quantum state of the graviton field outside a black hole horizon carries information about the internal state of the hole. We explain how this allows unitary evaporation: the final radiation state is a complex superposition which depends linearly on the initial black hole state. Under time reversal, the radiation state evolves back to the original black hole quantum state. Formulations of the information paradox on a fixed semiclassical geometry describe only a small subset of the evaporation Hilbert space, and do not exclude overall unitarity.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Theoretical Particle Physics Research Group
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 24 Feb 2022 10:00
Last Modified: 01 Mar 2022 12:15
URI: http://sro.sussex.ac.uk/id/eprint/104537

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