Locally Mediated Entanglement in Linearized Quantum Gravity

Author(s)
Marios Christodoulou, Andrea Di Biagio, Markus Aspelmeyer, Časlav Brukner, Carlo Rovelli, Richard Howl
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 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.

Organisation(s)
Research Network Quantum Aspects of Space Time, Quantum Optics, Quantum Nanophysics and Quantum Information
External organisation(s)
Österreichische Akademie der Wissenschaften (ÖAW), Sapienza University of Rome, Université de Toulon, Perimeter Institute for Theoretical Physics, University of Oxford, University of Hong Kong, University of Western Ontario
Journal
Physical Review Letters
Volume
130
No. of pages
7
ISSN
0031-9007
DOI
https://doi.org/10.48550/arXiv.2202.03368
Publication date
03-2022
Peer reviewed
Yes
Austrian Fields of Science 2012
103025 Quantum mechanics, 103028 Theory of relativity
Keywords
ASJC Scopus subject areas
Physics and Astronomy(all)
Portal url
https://ucris.univie.ac.at/portal/en/publications/locally-mediated-entanglement-in-linearized-quantum-gravity(1d9b1cca-c518-49fb-adfe-851342d1c5e6).html