On 05-04-2022 01:24, Bruce Kellett wrote:

On Tue, Apr 5, 2022 at 7:16 AM smitra <smi...@zonnet.nl> wrote: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'stheorem is proved by assuming you have local hidden variablesthatspecify the outcomes of experiments and then derivinginequalitiesthat 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 assumedIt is not. Bell made no such assumption. I require textual proof of such a claim.

`Local hidden variables determine the measurement results ----> Bell's`

`inequalities are satisfied.`

QM is not deterministic. And locality is not the same as separability.It is. You show me a separable system that is not local, or a local system that is not separable.

`Locality = The dynamics if a system is local. We don't call classical`

`physics non-local just because you can creater a system that exhibits`

`non-local effects.`

Humean supervenience, which regards all of physics as supervening on isolated local point-like objects, is local by construction. It has no non-separable states by definition. The argument is simple: All local states are separable (By definition of locality and separability). Therefore non-separable states are not local. (Modus tollens) Quantum mechanics embodies non-separable states. Therefore quantum mechanics contains non-local states.

QM violates the Bell inequalities, which means that there cannot be an underlying local hiddenvariablemodel for QM. But QM itself can be local,That is not a valid conclusion. Any local account of thecorrelationscan always be cast as a hidden variable theory -- if for no other reason than if there is a local mechanism at play, this mechanismisnot evident in the standard theory (therefore hidden). Everettianmanyworlds, if they could actually play this role, would be counted as hidden variables for Bell's analysis. Bell does not specify whatformthese hidden variables should take.If all outcomes are realized then there cannot exist hidden variables.That is a rather arbitrary assertion. And it is not true. Hidden variables are variables or things that are not seen.

Which are assumed to determine experimental outcomes.

The outcome of experiments is fundamentally stochastic in the MWI.The outcome of experiments is stochastic in ordinary QM -- QM is not deterministic.

`which means that Bells' theorems do not apply to pure QM (i.e. QM`

`assumed to be a fundamental theory, with no underlying hidden variable`

`theory). Tis is also the point made by Sidney Coleman.`

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.I have seen attempts at such accounts. The trouble is that Aspect's experiments were not performed in a quantum computer! It is Aspect's experiments that are to be explained. It would be more interesting if you could give such an account for a classical computer. What is it that is significant about the QC? It is generally understood that a quantum computer might give a speed-up on some tasks, but it cannot actually do anything that a classical computer could not do, given sufficient time. The interesting question is why quantum computer accounts do not correspond to laboratory experience. I think it has something to do with the formation of permanent records. But you might have a better account.

`There is a theorem that says that systems that can create entanglement`

`while complying with locality must be non-classical:`

https://arxiv.org/abs/1907.08994 So, this is a settled issue. Saibal

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