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Quantum Gravity Relativistic Quantum Information

Multi-time measurements in Hawking radiation: information at higher-order correlations

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Authors: Charis Anastopoulos, Ntina Savvidou

Year

2019

Paper ID

1869

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

111

Citations

3

Abstract

Abstract It is believed that no information can be stored in Hawking radiation, because correlations between quanta of different field modes vanish. However, such correlations have been defined only with reference to a single moment of time. In this article, we develop a method for the evaluation of multi-time correlations. We find that these correlations are highly non-trivial: for a scalar field in the Schwarzschild black hole, multi-time correlations have an explicit dependence on angular variables and on the scattering history of Hawking quanta. This result leads us to the conjecture that some pre-collapse information can be stored in multi-time correlations after backreaction effects have been incorporated in the physical description.

Why This Paper Matters

  • This paper contributes to the Quantum Gravity & Relativistic Quantum Information research area in the Quantum Articles archive.
  • It adds a 2019 reference point for readers tracking recent quantum research.
  • Abstract It is believed that no information can be stored in Hawking radiation, because correlations between quanta of different field modes vanish.

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References & Citation Signals

[1] DOI https://doi.org/10.1088/1361-6382/ab5eb2 [2] Publisher https://doi.org/10.1088/1361-6382/ab5eb2

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