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Generating quantum nonlocal entanglement with mechanical rotations

Marko Toroš1, Maria Chiara Braidotti2, Swain Ashutosh2, Mauro Paternostro3,4, Miles Padgett2, and Daniele Faccio2

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Phys. Rev. Research 7, 033197 – Published 27 August, 2025

DOI: https://doi.org/10.1103/84vr-nnvs

Abstract

Recent experiments have searched for evidence of the impact of noninertial motion on the entanglement of particles. The success of these endeavors has been hindered by the fact that such tests were performed within spatial scales that were only “local” when compared to the spatial scales over which the noninertial motion was taking place. We propose a Sagnac-like interferometer that, by challenging such bottlenecks, is able to achieve entangled states through a mechanism induced by the mechanical rotation of a photonic interferometer. The resulting states violate the Bell-Clauser-Horne-Shimony-Holt (Bell-CHSH) inequality all the way up to the Tsirelson bound, thus signaling strong quantum nonlocality. Furthermore, we show that the Bell-CHSH inequality remains violated even without using any form of postselection up to the value 1+2. Our results demonstrate that mechanical rotation can be thought of as resource for controlling quantum nonlocality with implications also for recent proposals for experiments that can probe the quantum nature of curved spacetimes and noninertial motion.

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Outline

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Phys. Rev. Research 7, 033197– Published 27 August, 2025
  • Received 26 July 2024
  • Accepted 31 July 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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