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Its not the quantum state at preparation but they are still evolving a quantum state backward in time from measurement. They are doing...

They are evolving a quantum state backward from the measurement. They are using quantum theory and just exploiting that it seems to work...

I will give my take here on why it is not obvious that the backpropagation is "time-travel", connected to the fact that the quantum...

I don't think so. Its related to Bayes' theorem about probabilities so I can't see this as making any presumption about determinism...

If it relies on information going backward-in-time, it doesn't rely on the other spatially separated measurement in a manner which is...

The description used in the papers is done exclusively with quantum theory, so I think what it comes down to is whether backward...

Maybe, but I think that if this retrodiction is problematic, you have to ask why it seems to exist as an option in quantum theory in the...

I think it does though because the explanation only relies on a random measurement outcome and what that retrodicts backward-in-time in...

Just realized that the first link I gave is not obviously accssible. One of these links has a straightforward pdf link. Section 4 has...

The papers infer the correct Bell correlation in a manner that looks local, or doesn't require distamt communication in the.inference...

I meant it does the same in both cases once you measured the outcome and evolve back from it. The gist of the mechanism is you measure...

What I mean is that retrodicting back-in-time from the polarization measurement outcome always retrodicts the polarization state...

Thats strange, it gives me as of now both the full article on the page and a pdf link. I can only offer a different link...

These papers by Pegg et al. (doi: 10.1016/j.shpsb.2008.02.003 [section 4]...

Put in an extreme instrumental form, I think "The ultimate test for a model is the agreement of its predictions with experiments"...