On 8/20/2018 11:50 AM, Bruno Marchal wrote:
I said you must include the detector, which has certain angle, and an interaction term. Then the
uncertainty is only whether the detector says "up" or "down" and there are only two
"worlds" that split by decoherence.
Yes, that is why the choice of the angle and the detector portioned the
superposition in some way, but as Alice mind cannot impose a preference on this
to nature and the psi state, she lost the ability to access to some worlds.
Thus the multi-multiverse. Which I think is just the multiverse seen by taking
account the quantum state is a Gauge state, having always a phase, except for
the big whole. It is first person plural view, and thus psi is more epistemic
than Everett would have liked, perhaps, and things are undoubtably subtle
there. My point is that believing Everett remains non local is premature, at
the least, and is usually based on some naive conception of “classical world”.
The classical world is epistemologically prior. Everything about QM is
inferred and based on "classical" observation.
Brent
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