Quantum technologies have matured to the point that we can test fundamental quantum phenomena under extreme conditions. Specifically, entanglement, a cornerstone of modern quantum information theory, can be robustly produced and verified in various adverse environments. We take these tests further and implement a high-quality Bell experiment during a parabolic flight, transitioning from microgravity to hypergravity of 1.8 g while continuously observing Bell violation, with Bell-CHSH parameters between S=−2.6202 and −2.7323, an average of S=−2.680, and average standard deviation of ΔS=0.014. This violation is unaffected both by uniform and non-uniform acceleration. This experiment demonstrates the stability of current quantum communication platforms for space-based applications and adds an important reference point for testing the interplay of non-inertial motion and quantum information.
@article{arxiv.2303.13183,
title = {Photonic entanglement during a zero-g flight},
author = {Julius Bittermann and Lukas Bulla and Sebastian Ecker and Sebastian Philipp Neumann and Matthias Fink and Martin Bohmann and Nicolai Friis and Marcus Huber and Rupert Ursin},
journal= {arXiv preprint arXiv:2303.13183},
year = {2024}
}