[ExI] R: Re: R: Re: Re: R: Re: R: Re: Cramer on impossibility of FTL communication

scerir at alice.it scerir at alice.it
Fri Sep 4 16:28:18 UTC 2015


Unlike the ordinary entanglement creation, where the two particles have

interacted *earlier*, here the only common event lies *in the future*.

How so?  The two atoms never interacted at all.  The only interaction that creates entanglement is at the detector - and, again, the atoms are only entangled with respect to that detector.  (For all the detector knows, another photon may have been emitted in another direction, which the detector would never see, causing them both to be in the ground state.  All it knows is that at least one atom emitted.)  To any observer near the atoms, able to see what state they are in, they are not entangled; the presence or absence of such an observer does not directly change the state of the detector's knowledge.

In general you seem to be postulating, "If we 
are uncertain about which of two things did something or is something, then
 they must be interacting with each other at any future point where some external observer finally clears up that uncertainty."  That conclusion does not follow from that premise.
That is why QM is weird.

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