The EPR Paradox
Measure one particle here and you instantly know something about its partner light-years away. Einstein thought this proved physics was unfinished.
1935 (argument), 1964 (Bell's theorem), 2015 (loophole-free tests)21 min read
American experimental physics
John Clauser
1942
Co-author of the 1969 CHSH inequality, which recast Bell's theorem into a form that a real laboratory could test, and with Stuart Freedman performed the first such experiment in 1972 at Berkeley. He expected to confirm hidden variables and was disappointed by his own result. He shared the 2022 Nobel Prize in Physics with Alain Aspect and Anton Zeilinger.