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Incoming links: Professional profile of John Francis Clauser (johnclauser.com)
John Clauser Created 2026-10-24 Updated 2026-11-05
John Clauser and Stuart Freedman tested local hidden-variable theories with photons from a calcium atomic cascade. They measured joint detections behind differently oriented polarizers and compared a combination of those rates with a Bell inequality. The observed violation agreed with quantum mechanics, turning assumptions about distant outcomes into a quantitative laboratory test. The experiment used additional assumptions about detection and the sampled photon pairs; it did not close every later-identified experimental loophole.[ref]
Experimental Test of Local Hidden-Variable Theories by Stuart Jay Freedman and John Francis Clauser. 1972 paper, abstract, apparatus and inequality comparison
A physicist who performed experimental tests of Bell inequalities.[ref]
Professional profile of John Francis Clauser (johnclauser.com). Self-authored opening identity paragraph.
Portrait of John Clauser
. Peter Lyons, photograph; Adem, existing portrait crop. CC BY-SA 4.0, via Wikimedia Commons. Source..jpg){kind=link}