Testing Bell’s Inequality with Cosmic Photons: Closing the Setting-Independence Loophole by Gallicchio, Jason, Kaiser, David I., Friedman, Andrew Samuel

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Cosmic Bell Test Using Random Measurement Settings from High-Redshift Quasars by Rauch, Dominik, Handsteiner, Johannes, Hochrainer, Armin, Gallicchio, Jason, Friedman, Andrew S., Liu, Bo, Bulla, Lukas, Ecker, Sebastian, Steinlechner, Fabian, Ursin, Rupert, Hu, Beili, Leon, David, Benn, Chris, Ghedina, Adriano, Cecconi, Massimo, Scheidl, Thomas, Zeilinger, Anton, Leung, Calvin, Guth, Alan, Kaiser, David I

“…This experiment pushes back to at least ∼7.8  Gyr ago the most recent time by which any local-realist influences could have exploited the “freedom-of-choice” loophole to engineer the observed Bell violation, excluding any such mechanism from 96% of the space-time volume of the past light cone of our experiment, extending from the big bang to today.…”
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Astronomical random numbers for quantum foundations experiments by Leung, Calvin, Brown, Amy, Nguyen, Hien, Friedman, Andrew S., Gallicchio, Jason, Kaiser, David I.

“…In addition, a sufficiently high fraction of bits generated are of true astronomical origin in order to address both the locality and freedom-of-choice loopholes when used to set the measurement settings in a test of the Bell-CHSH inequality.…”
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