Comment by caturopath
1 day ago
To be precise, Bell's inequality rules out a local hidden variable theory. Pilot wave theories/Bohmian mechanics is an attempt to describe a nonlocal hidden variable theory of quantum mechanics.
1 day ago
To be precise, Bell's inequality rules out a local hidden variable theory. Pilot wave theories/Bohmian mechanics is an attempt to describe a nonlocal hidden variable theory of quantum mechanics.
To be even more precise, it rules out hidden variable theories that satisfy Bell locality, i.e. the assumptions that the theorem makes.
Superdeterminism and retrocausality both allow for local hidden variables - it’s just that they don’t satisfy Bell’s assumptions.
They're also generally regarded as weirder than the problem they are trying to solve.
Intuitive notions of “weird” aren’t necessarily a good guide here. We already know time doesn’t behave the way we intuitively imagine, because of relativity: there can’t be universal agreement on what is past, present, or future. Once you’ve accepted that, retrocausality seems much less strange.
Similarly, superdeterminism is simply the application of the determinism that was believed to apply to physics before QM, to QM itself. In a way, one might have expected it to be the default interpretation.
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