On 2/06/2017 7:28 am, smitra wrote:
On 01-06-2017 02:26, Bruce Kellett wrote:
On 1/06/2017 4:43 am, Bruno Marchal wrote:
Non-locality is not removed in MWI as you appear to believe.
For me the abandon of the collapse is the solution of the EPR
"paradox", and Aspect experience is somehow the confirmation of our
belonging to macrosuperposition.
The non-local (paradoxical) nature of EPR remains even without
collapse. As on the previous occasion we discussed this, you were
unable to demonstrate where the notion of 'collapse' is used in Bell's
theorem - all Bell requires is that measurements give results, and
that is what the whole of physics is based on: in MWI as well as in
any other interpretation.
Bruce
In the MWI there are only trivial common cause like effects. There is
no non-locality in some mysterious sense like there is in the CI where
somehow there is a non-local effect but you don;t have information
transfer. The mistake most people make when arguing that the MWI
doesn't resolve the problem is that they can't get their head around
the fact that even when Alice and Bob meet and Alice has not yet
communicated everything that's necessary to Bob, that the Alice that
Bob sees has yet to collapse in the branch corresponding to whatever
she is going to say (Bob's consciousness is thus located in many
different branches of Alice, even if the atoms in his body will be in
different states due to decoherence).
I think that either you or someone else said something like this when
this was last discussed. I have a couple of points to make:
1. This is not quantum mechanics, or the many worlds interpretation of
QM. It is your own idiosyncratic theory that has no bearing on the
question of non-locality in QM.
2. Even in its own terms, this theory is nothing more than an
undisguised appeal to magic. You want consciousness to be unrelated to
the decohered body. That conflicts with the overwhelming experimental
evidence in favour of the supervenience on consciousness on the physical
brain -- they move in lockstep, so if your body has decohered having
obtained a particular measurement result, all copies (if there be such)
of this consciousness are conscious of the same measurement result. By
the identity of indiscernibles, there is then only one body and one
consciousness. That is what QM and MWI tell you, any deviations are
simple fantasy.
Bruce
The apparent non-locality is then purely an artifact on making such
assumptions about localization in branches when that's wrong to do.
Saibal
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