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Incoming links: Professional profile of Alain Aspect (academie-sciences.fr)
Alain Aspect Created 2026-10-18 Updated 2026-11-05
Alain Aspect, Jean Dalibard and Gérard Roger tested Bell inequalities using pairs of photons and rapidly changing polarization analyzers. An acousto-optical switch in each arm routed light toward one of two polarizers; switching near changed the effective setting on a timescale shorter than the photon transit time between the analyzers. The measured correlations violated the tested Bell inequality. These switches were driven at incommensurate frequencies, so their role should be distinguished from the independently randomized settings of later experiments.[ref]
Experimental Test of Bell's Inequalities Using Time-Varying Analyzers by Alain Aspect and others. Abstract and apparatus description, acousto-optical switches and timing
A physicist researching quantum optics and the foundations of quantum mechanics.[ref]
Professional profile of Alain Aspect (academie-sciences.fr). Biographie, first two paragraphs.
Portrait of Alain Aspect
. École polytechnique Université Paris-Saclay; Adem, existing portrait crop. CC BY-SA 2.0, via Wikimedia Commons. Source._(cropped).jpg){kind=link}