Quantum correlation tests at cosmic distances

Quantum Physics [Submitted on 15 Apr 2026] Quantum correlation tests at cosmic distances Thomas Durt, Jean Schneider It is commonly accepted that the results of measurements simultaneously realized over two entangled subsystems are statistically correlated instantaneously regardless of the distance between them. In accordance with Bell theorem, everything happens in such measurements as if there was a correlation propagating at infinite speed between the two this http URL correlations have been so far verified experimentally up to a distance of 1200 km. We discuss the interest and feasibility of extending this distance to 390,000 km, thus gaining a factor of 300. The idea is to install one of the polarimeters on the Moon, with the other on Earth. Such an experiment would provide a new test of Quantum Physics and allow to put higher constraints on alternative theories and interpretations. We also discuss the possibility to violate Bell inequalities beyond Earth-Moon distance. Comments: Accepted in Annales de la Fondation Louis de Broglie Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.14252 [quant-ph]   (or arXiv:2604.14252v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.14252 Focus to learn more Submission history From: Jean Schneider [view email] [v1] Wed, 15 Apr 2026 12:08:00 UTC (306 KB) Access Paper: view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-04 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)