From: *Bruno Marchal* <[email protected] <mailto:[email protected]>>
On 11 Apr 2018, at 14:19, Bruce Kellett <[email protected]
<mailto:[email protected]>> wrote:
From: *Bruno Marchal* <[email protected] <mailto:[email protected]>>
If you believe in influence at a distance, you are the one needing
to show the evidence of that extra-ordinary fact.
The fact is demonstrated by the experiments that test Bell
inequalities on the singlet state.
Not at all. This proves the existence of influence at a distance when
we suppose that a measurement gives an outcome, but in QM without
collapse, a measurement gives all outcomes, with varying relative
probabilities.
The measurement on one of the spin-half particles in the singlet state
has only two possible outcomes. As is often said in discussions of
non-locality in Everettian QM, 'measurements that are not made do not
have outcomes!'
You did not. You have even considered a singlet state like if it
involves 4 parallel universes, when it involves infinitely many. See
more in the archive.
The singlet state involves only four possible combinations of
experimental results
We have discussed this, and I have never agree with this. The singlet
state (in classical non GR QM) describes at all times an infinity of
combinations of experimental result.
This is false. Even in Everettian QM there are only two possible
outcomes for each spin measurement: this leads to two distinct worlds
for each particle of the pair. Hence only 4 possible parallel universes.
Where do you get the idea that there are infinitely many parallel
universes? This is not part of Everettian QM, or any other model of QM.
But even if you can manufacture an infinity of universes, you still have
not shown how this removes the non-locality inherent in the quantum
formalism.
Bruce
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