On Fri, Nov 24, 2017 at 1:15 PM, Bruno Marchal <[email protected]> wrote:
> > > I was just explaining that a measurement is any memorable interaction, > which is simplest to illustrate with a tensor product of Alice (|A>)and a > simple superposition. In your notation: |A> (|UP> + |DN>) = |A> |UP> + |A> > |DN> . > > In the case of the singlet state, it is more subtle, as |UP>|DN> - > |DN>|UP> describes a many-worlds with Alice having a spin in any direction, > and Bob, too but the opposite relatively to each others (the notation is > misleading). We must keep in mind the rotational invariance of the spin. So > we the Alice Bob situation is more intricate and tedious to describe. > Sometimes I referred to the simple account of this in the Everett FAQ by > Michael Clive Price, but it seems not available since some times. We have > copied the relevant details in previous discussions though, so you might > try to find it in the archives with the key word "Michael", or something. I > have unfortunately not the time "here and now". Later perhaps. With > Everett, it is important to reason independently of the bases in between > the measurements. > > I guess you see that violation of the BI leads to "action at a distance" > if we assume a collapse, or a mono-world theory. I don't see Bell' > argument applying in the MW context, though. > > Bruno > > > Bruno, Is this the Many Worlds FAQ you were referring to? http://www.anthropic-principle.com/preprints/manyworlds.html I think the parts relevant to EPR, Bell Inequality and Locality (for those interested) are Q12 and Q32. Jason -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
