Locally mediated entanglement in linearised quantum gravity

• URL: http://arxiv.org/abs/2202.03368v2
• Date: Tue, 5 Dec 2023 15:04:10 GMT
• Title: Locally mediated entanglement in linearised quantum gravity
• Authors: Marios Christodoulou, Andrea Di Biagio, Markus Aspelmeyer, \v{C}aslav Brukner, Carlo Rovelli, Richard Howl
• Abstract summary: An information-theoretic argument: entanglement mediated by a local field certifies that the field is not classical. Previous derivations of the effect modelled gravity as instantaneous. In this framework, entanglement is clearly mediated by a quantum feature of the field.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The current interest in laboratory detection of entanglement mediated by gravity was sparked by an information--theoretic argument: entanglement mediated by a local field certifies that the field is not classical. Previous derivations of the effect modelled gravity as instantaneous; here we derive it from linearised quantum general relativity while keeping Lorentz invariance explicit, using the path integral formalism. In this framework, entanglement is clearly mediated by a quantum feature of the field. We also point out the possibility of observing retarded entanglement, which cannot be explained by an instantaneous interaction. This is a difficult experiment for gravity, but is plausible for the analogous electromagnetic case.

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