On 10-05-2016 06:04, Bruce Kellett wrote:
Non-locality was not the issue with this example of the cat in the box. All I was seeking to establish was that the observer maybe on definite branches of the wave function (i.e., have been "split") without knowing about it. The wave function here is taken to be an objective description of the system, and the observer is part of the wave function. So the observer might well be on both the cat-dead and cat-alive branches, but be unaware of which. The cat is definitely dead on the cat-dead branch and alive on the cat-alive branch. So this is an objective fact of the evolved wave function, even thought the observer has no yet self-located. Opening the box then conveys information to the observer, but does not kill the cat, or cause the split in the wave function, or the observer. The duplicated persons may objectively be, one in Washington and one in Moscow, without being aware of which city (branch of the wave function) they are in. Opening the door and finding out conveys information, but does not transport the person to that city.
Yes, but even in the case of the observer getting localized without he or she consciously being aware of that, this localization effect will still be due to local interaction with the branches in the region he/she is in. So whether or not localization in a branch requires conscious awareness of the differences between the two branches isn't relevant.
This means that when Alice is on her way to meet with Bob, she won't be localized inside Bob's branches corresponding to Bob having obtained definite results with definite polarizer settings, at least until that time she gets located inside the light cone emanating from the points at Bob's location at the times when the relevant information about these facts were created.
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