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Forums
Physics
Quantum Physics
Order of observations in Bell experiments
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[QUOTE="entropy1, post: 5480279, member: 169968"] There is a strange sort of symmetry here, that I can illustrate if we take an entangled photon pair fired at polarization filters instead of an electron pair: Suppose filter A is at angle α and filter B at angle β. If we assume that photon A arrives first at filter A, it collapses to polarization direction α. Now, photon B has probability amplitude cos(β-α) to pass filter B. Conversely, if photon B arrives first at filter B, it collapses to polarization direction β, leaving A a probability amplitude of cos(α-β) of passing filter A. When the information of the two is combined we obtain probability cos(β-α)*cos(α-β) of correlation. This is symmetrical. The same holds for measuring entangled particle spins at some angle. [/QUOTE]
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Forums
Physics
Quantum Physics
Order of observations in Bell experiments
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