Dear Peter,
as always, thank you very much for the effort in explaining your model.
I have a problem with your statement that
"Now we've established B is always opposite spin/OAM to A"
When measuring a particle pair at relative angles of 90°, one measures - for one of the particles - along one plane and for the other particle along the remaining plane. So to speak, at one side of the experimental setup there is a measurement relative to the polar axis (P), at the other side relative to the equatorial plane (E). Lets define these measurement axis' such, that at one side of the experimental setup, the spin is measured in the plane of my computer monitor P (up/down). At the other side of the experimental setup the spin is measured perpendicular to the plane of my computer monitor E (in/out).
The experimental results for this scenario give the following 4 possible outputs:
1. (up/in)
2. (down/out)
3. (up/out)
4. (down/in)
These experimental results are the same, independent of the direction of the magnets' field lines in the E plane (despite of having the south pole of the magnet in front of me or the north pole of the magnet in front of me).
We can label the outputs 1 and 2 as perfect correlation, the outputs 3 and 4 as perfect anti-correlation. This would indicate that either only 1 and 2 could be measured in such an experiment, or only 3 and 4. Regardless of how we define the correlations, this holds also for other definitions of correlations from these 4 possibilities. In real experiments however, in the case of a relative angle of 90°, there can occur all 4 possible states, and, as tested in real experiments, each output occurs with 25% probability (surely this result also holds for all other scenarios where the two measurement axis are perpendicular to each other, say for 37,7° and 127,7°).
For the reasons described above, i do not understand that in our case of a relative angle of 90°
"Now we've established B is always opposite spin/OAM to A"
This would indicate, that for the 90° case, for every tested pair of particles we should observe an (anti-)correlation of their outcomes ('anti' in reference to wether the second magnets' field orientation points in or out of my computer displays' plane).
Note that if the relative angle is not 90°, but say, 10°, the perfect correlations are already destroyed, because in this case the experimental outputs deliver not only (up/down) and (down/up) results, but also (up/up) and (down/down) results.
Let's return to the second section above. Let's assume a 'counterfactual' experiment where the anti-correlations which i mentioned above are obtained - by turning the "in/out"-magnet by 180°. Under the exact *same* conditions (except the 180° turn of the magnet), for a local deterministic theory one should obtain the *inverse* results (anti-correlation) of our 90° experiment. How to discriminate this local deterministic assumption from the QM-assumption of randomness? The only way is to specify the physical processes that do lead to the different 4 output cases listed above.
So, now i am again at the point of my previous post, asking for a full description of the physical processes going on in our Bohmian experiment in the case of 90°. You gave a theoretical description - an algorithm which compresses the known data. But the point is, any local realistic model must not only be local, but also realistic. You know that Hans de Raedt has constructed algorithms which can simulate the QM outputs. But these are only algorithms, not real particles which fly in different directions and therefore are spacelike separated from each other. To clear the whole confusion, you should tell us the physical processes that are exibited on the two spacelike separated particles in the 90° case. In other words, you have to explain the occurrence of all of the 4 possibilities listed above and their respective probabilities (25%) in terms of physical processes.
I'm looking forward for further discussions of the whole issue - for me, it's the most interesting and exciting thread discussion i've had over years here.
Thank you very much for your effort!
Thanks also to the other participiants in this discussion!
Best wishes,
Stefan