Editorial: Quantum information theory
Abstract
influences-faster than the speed of light-which contradicted the spirit of Einstein's relativity and which Einstein famously described as "spooky." Recognizing the extraordinary implications of his claim, Bell emphasized the necessity of definitive experimental proof that photonpair measurements could not influence one another through any signal propagating at or below the speed of light. Alain Aspect and his collaborators provided a groundbreaking solution by developing experiments that rapidly switched polarizer angles in between measurement, ensuring that the actual pair-measurements could not influence each other within the light-speed limit.These fast-switching experiments were later refined by research groups led by Alain Aspect, John Clauser, and Anton Zeilinger-whose team even conducted photon-pair measurements between distant Canary Islands. Their collective achievements were recognized with the 2022 Nobel Prize in Physics. In their Nobel lectures, they emphasized Bell's postulated quantum nonlocalities. Many researchers have since endorsed this interpretation, arguing that such instantaneous influences underpin the computational advantages of quantum systems. However, no direct empirical proof of this claim exists, and Bell's theoretical framework remains the principal foundation for associating quantum superposition with nonlocality. Consequently, Bell's inequalities have become a central defense against more conventional, Einsteinian interpretations of quantum…
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