On Wed, Mar 9, 2022 at 9:14 AM John Clark <johnkcl...@gmail.com> wrote:
> On Tue, Mar 8, 2022 at 4:53 PM Bruce Kellett <bhkellet...@gmail.com>
> wrote:
>
>>
>> *> It's a shame that we have spent so much time arguing about this when
>> it is clear that you do not have the remotest understanding of what the
>> issues actually are. The opposite polarization states you mention above are
>> a direct consequence of the non-locality of the non-separable entangled
>> spin state.*
>>
>
> Right, if Many Worlds and all other non-realistic theories turn out to be
> wrong then things really are non-local, unless they're superdetermined, but
> that's ridiculous.
>
> As I said in a private communication with you:
>
> "There is room in the multiverse for there to be a universe that contains
> an Alice who sets her polarizer to ANY angle you care to name, and every
> one of those universes also contains a Bob who has set his polarizer
> parallel to Alice's. And when one sees up polarization ("up" being defined
> as the arbitrary angle Alice decides to set her polarizer) the other is
> absolutely positively 100% certain to see "down" and vice versa.
>
> There are, of course, universes in which Alice and Bob set their
> polarizers (or Stern–Gerlach magnets) at angles that are neither parallel
> nor orthogonal, but in such universes quantum reality experiments of this
> sort cannot be performed because the entanglement between the photons (or
> electrons) would be destroyed, so they're irrelevant.
>
There, in that statement, is one of your many sources of confusion. The
entanglement of the spins in the singlet state is a property of the state
itself -- the plorizer settings by either or both of Alice and Bob are
absolutely irrelevant for the existence of the initial entangled state.
Bruce
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