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Notes on EPR Paradox, Entanglement and Bell’s Inequality

The Programming Works – 1. Elements of reality (aka hidden variables) vs uncertainty. Suppose we have a spin-1/2 particle (ex electron) in the state (fig. 1). Quantum Mechanics (QM) states that if we measure the spin along z direction we get with probability and with probability . There is no way to tell which result will be obtained; the uncertainty of measurement of non-commuting observables is a fundamental law of nature. Einstein, Podolsky and Rosen (EPR) say – no, there is nothing fundamental here. The particle has elements of reality which determine the measurement result in a unique deterministic way; the ...
Favorite? Off-Topic? Serg @ 2015-06-22 11:49

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