Locally Mediated Entanglement in Linearized Quantum Gravity

Marios Christodoulou, Andrea Di Biagio, Markus Aspelmeyer, Časlav Brukner, Carlo Rovelli, Richard Howl

Publications: Contribution to journalArticlePeer Reviewed


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 modeled gravity as instantaneous; here we derive it from linearized 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.

Original languageEnglish
Article number100202
Number of pages7
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 10 Mar 2023

Austrian Fields of Science 2012

  • 103025 Quantum mechanics
  • 103028 Theory of relativity


  • quant-ph
  • gr-qc

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