From EPR-Schr\"odinger paradoxes to proofs of non locality

Jean Bricmont, Sheldon Goldstein, Douglas L. Hemmick

Jean Bricmont, Sheldon Goldstein, Douglas Hemmick

Jean Bricmont, Sheldon Goldstein, Douglas Hemmick

Walter F. Wreszinski

We introduce a principle, implicitly contained in Schroedinger's paper (Schr35), which allows a proof of the non-existence of the EPR-locality paradox in the Copenhagen interpretation of quantum mechanics. The paradox is shown to be well-posed already in the simplest example of an entangled state of two spins one-half, independently of the (well-taken) objections by Araki and Yanase that the measurement of spin is not a local measurement. We assume that any measurement results in the collapse of the wave-packet.

Jean Bricmont, Sheldon Goldstein, Douglas L. Hemmick

We give a conceptually simple proof of nonlocality using only the perfect correlations between results of measurements on distant systems discussed by Einstein, Podolsky and Rosen---correlations that EPR thought proved the incompleteness of quantum mechanics. Our argument relies on an extension of EPR by Schrödinger.

M. A. B. Whitaker, J.G. Dennison