Quantum theory had predicted that correlations between entangled particles exceed the value attainable by classical particles. Aspect and his colleagues confirm this prediction by performing a “Bell” test with photon pairs emitted from an atom, providing another win for the theory. Significantly, Aspect eliminates interactions among the measuring devices that had undermined the interpretation of earlier Bell tests.
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Bell test is a long time nightmare to me, I will learn this part for more detail later~
