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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