Harvesting mutual information from BTZ black hole spacetime

Abstract

We investigate the correlation harvesting protocol for mutual information between two Unruh-DeWitt detectors in a static BTZ black hole spacetime. Here, the effects coming from communication and change in proper separation of the detectors are set to be negligible so that only a black hole affects the extracted mutual information. We find that, unlike the entanglement harvesting scenario, harvested mutual information is zero only when a detector reaches an event horizon, and that although the Hawking effect and gravitational redshift both affect the extraction of mutual information, it is extreme Hawking radiation that inhibits the detectors from harvesting.

10 pages, 4 figures; v2: fixed typos

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Cited by in corpus (5)

• Harvesting entanglement from the gravitational vacuum
• Entanglement harvesting of three Unruh-DeWitt detectors
• The role of quantum degrees of freedom of relativistic fields in quantum information protocols
• How measuring a quantum field affects entanglement harvesting
• Mutual information harvested by uniformly accelerated particle detectors