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Extracting Information about the Initial State from the Black Hole Radiation

Kinjalk Lochan and T. Padmanabhan
Phys. Rev. Lett. 116, 051301 – Published 1 February 2016

Abstract

The crux of the black hole information paradox is related to the fact that the complete information about the initial state of a quantum field in a collapsing spacetime is not available to future asymptotic observers, belying the expectations from a unitary quantum theory. We study the imprints of the initial quantum state contained in a specific class of distortions of the black hole radiation and identify the classes of in states that can be partially or fully reconstructed from the information contained within. Even for the general in state, we can uncover some specific information. These results suggest that a classical collapse scenario ignores this richness of information in the resulting spectrum and a consistent quantum treatment of the entire collapse process might allow us to retrieve much more information from the spectrum of the final radiation.

  • Received 6 August 2015

DOI:https://doi.org/10.1103/PhysRevLett.116.051301

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Kinjalk Lochan* and T. Padmanabhan

  • IUCAA, Post Bag 4, Ganeshkhind, Pune University Campus, Pune 411 007, India

  • *kinjalk@iucaa.ernet.in
  • paddy@iucaa.ernet.in

See Also

Information retrieval from black holes

Kinjalk Lochan, Sumanta Chakraborty, and T. Padmanabhan
Phys. Rev. D 94, 044056 (2016)

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Issue

Vol. 116, Iss. 5 — 5 February 2016

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