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
French experimental physics
Alain Aspect
1947
French physicist whose experiments at Orsay between 1981 and 1982 gave the first high-precision violations of Bell's inequalities, including the celebrated 1982 run with time-varying analysers that closed the locality loophole to a substantial degree. He shared the 2022 Nobel Prize in Physics with John Clauser and Anton Zeilinger.