On 7/06/2016 6:57 pm, Bruno Marchal wrote:
On 07 Jun 2016, at 04:24, Bruce Kellett wrote:
That sounds like you actually do accept the standard concept of
non-locality in quantum mechanics! Spacelike separated particles can
interfere probabilistically without any possible interactions
(mechanistic force-field exchanges) between them: that is precisely
what is meant by non-locality in this context.
I think you have been too tied up with a mechanistic interpretation
of non-locality -- you appear to think that it necessarily involves
FTL exchange of some particle or other mechanistic influence. But
this is not necessarily the case -- we don't actually postulate
non-local hidden variables of this type because that would represent
an attempt to give a "local" account of "non-locality". All that is
involved is that the singlet state is a unity, even though the
entangled particles might be widely separated. This is reflected in
the fact that the wave function itself is intrinsically non-local --
it is local and deterministic only in configuration space, not in
3-dimensional physical space.
You are the one who seem to accept that such a non-locality is not
physical, but due to the internal relative FPI. If you agree there is
no FTL action in any physical realities, I guess we agree, then.
I have always been clear that no FTL mechanistic disturbance was
involved in quantum non-locality. We seems to agree on that. However,
"the internal relative FPI" is just a sequence of words that has little
meaning in this context. Why not just accept that the observed results
come from the standard evolution of the wave function, so the observed
non-locality is just a property of the wave function -- no mystery or
magical FPI about it at all.
Bruce
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