= John Clauser
{c}
{tag=Physicist}
{wiki}
= John Francis Clauser
{c}
{synonym}
= J. F. Clauser
{c}
{synonym}
= John F. Clauser
{c}
{synonym}
<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.<Experimental Test of Local Hidden-Variable Theories by Stuart Jay Freedman and John Francis Clauser>[1972 paper, abstract, apparatus and inequality comparison]{ref}
A <physicist> who performed experimental tests of <Bell inequalities>.<Professional profile of John Francis Clauser (johnclauser.com)>[Self-authored opening identity paragraph.]{ref}
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{title=Portrait of <John Clauser>}
{description=Peter Lyons, photograph; Adem, existing portrait crop. https://creativecommons.org/licenses/by-sa/4.0/[CC BY-SA 4.0], via Wikimedia Commons.}
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