EPR Paradox & Bell Inequality
Einstein, Podolsky, Rosen experiment (continued)
EPR said that each particle is “real” -- it is “A” or “B” no matter what any detector says.
Quantum Mechanics predicts the two particles are “intertwined” in one wave function. Neither particle is in a definite state (“A” or “B” ) until it is detected!
John Bell (1964) constructed a simple inequality which could be measured to decide who is right.
Result: Quantum Mechanics is right!