Locally mediated entanglement through gravity from first principles
- Author(s)
- Marios Christodoulou, Andrea Di Biagio, Markus Aspelmeyer, Časlav Brukner, Carlo Rovelli, Richard Howl
- Abstract
Observing entanglement generation mediated by a local field certifies that the field cannot be classical. This information-theoretic argument is at the heart of the race to observe gravity-mediated entanglement in a `table-top' experiment. Previous derivations of the effect assume the locality of interactions, while using an instantaneous interaction to derive the effect. We correct this by giving a first principles derivation of mediated entanglement using linearised gravity. The framework is Lorentz covariant -- thus local -- and yields Lorentz and gauge invariant expressions for the relevant quantum observables. For completeness we also cover the electromagnetic case. An experimental consequence of our analysis is the possibility to observe *retarded* mediated entanglement, which avoids the need of taking relativistic locality as an assumption. This is a difficult experiment for gravity, but could be feasible for electromagnetism. Our results confirm that the entanglement is dynamically mediated by the gravitational field.
- Organisation(s)
- Research Network Quantum Aspects of Space Time, Quantum Optics, Quantum Nanophysics and Quantum Information
- External organisation(s)
- Österreichische Akademie der Wissenschaften (ÖAW), Università degli Studi di Roma La Sapienza, Université de Toulon, University of Western Ontario, Perimeter Institute for Theoretical Physics, University of Oxford, University of Hong Kong
- Journal
- Physical Review Letters
- Volume
- 130
- No. of pages
- 10
- 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
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/locally-mediated-entanglement-through-gravity-from-first-principles(1d9b1cca-c518-49fb-adfe-851342d1c5e6).html