On 4/25/2018 4:09 AM, Bruce Kellett wrote:
Deutsch tries to answer the case by showing that information transfer is everywhere local. That is fine, because that was never in dispute. He does not seem to realize that it is the non-separability of the wave-function, not information transfer, that lies at the heart of the issue, and he simply did not address the real source of the non-locality; which is that the wave-function itself vanishes for combinations of worlds that violate angular momentum conservation. It is a property of the wave-function, not a property of the number of "worlds" you consider, or the way information is conveyed between experimenters.
But it also depends on the fact that the wave-function does not encode any specific angular momentum for the particles (no local hidden variables), so when a definite value, UP or DOWN, value is found by Alice this definiteness of value is entailed at Bob.
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