On Mon, 13 Nov 2017 at 8:54 am, Bruce Kellett <bhkell...@optusnet.com.au> 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
