On 04-04-2022 01:38, Bruce Kellett wrote:

On Mon, Apr 4, 2022 at 12:52 AM smitra <smi...@zonnet.nl> wrote:MWI is deterministic, but it's not a hidden variable theory. Bell's theorem is proved by assuming you have local hidden variables that specify the outcomes of experiments and then deriving inequalities that certain correlations should satisfy.The central assumption that Bell makes is that of locality, or separability. He shows that any local (separable) theory must give correlations that satisfy the inequalities. Whereas QM, and experiment, show that these inequalities are violated.

`Determinism is also assumed. QM is not deterministic. And locality is`

`not the same as separability.`

QM violates the Bell inequalities, which means that there cannot be an underlying local hidden variable model for QM. But QM itself can be local,That is not a valid conclusion. Any local account of the correlations can always be cast as a hidden variable theory -- if for no other reason than if there is a local mechanism at play, this mechanism is not evident in the standard theory (therefore hidden). Everettian many worlds, if they could actually play this role, would be counted as hidden variables for Bell's analysis. Bell does not specify what form these hidden variables should take.

`If all outcomes are realized then there cannot exist hidden variables.`

`The outcome of experiments is fundamentally stochastic in the MWI.`

Bells's theorem does not address theories that are not local hidden variable theories. QM itself provides a local explanations for all experimental outcomes, including for the Bell correlations.Then give it!

`I'll write up the local account for a Bell-type experiment performed in`

`a quantum computer.`

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