On Mon, 13 Nov 2017 at 8:54 am, Bruce Kellett <[email protected]> wrote:
> > I don't think you have fully understood the scenario I have outlined. > There is no collapse, many worlds is assumed throughout. Alice splits > according to her measurement result. Both copies of Alice go to meet > Bob, carrying the other particle of the original pair. Since they both > have now met Bob, the split that Alice occasioned has now spread to > entangle Bob as well as the rest of her environment. So there are now > two worlds, each of which has a copy of Bob, and an Alice, who has a > particular result. Locality says that Bob's particle is unchanged from > production, so when he measure its spin, he splits into two copies, > according to spin up or spin down. Since Alice is standing beside him, > she also becomes entangled with his result. But Alice already has a > definite result in each branch, so we now have four branches: with > results 'up-up', 'up-down', 'down-up', and 'down-down'. However, only > the 'up-down' and 'down-up' branches conserve angular momentum. How do > you rule out the other branches? When you put something in the cupboard and come back later to get it, why, under MWI, is it still there? > -- Stathis Papaioannou -- 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.
