Re: The Nature of Contingency: Quantum Physics as Modal Realism

```On 09-04-2022 07:10, Bruce Kellett wrote:
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`On Sat, Apr 9, 2022 at 11:35 AM smitra <smi...@zonnet.nl> wrote:`
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```
```On 08-04-2022 07:28, Bruce Kellett wrote:
```
```On Fri, Apr 8, 2022 at 1:42 PM smitra <smi...@zonnet.nl> wrote:

```
```
Locality implies separability. If you disagree, show me the
mathematics of a local state (referring to distinct spacetime
```
```points)
```
```that is not separable -- without begging the question, that is!

```
```
Locality refers to the dynamics of a theory, not to properties of
```
```some
```
```particular state.
```
```
The properties of the state refer to the dynamics of the
```
```underlying
```
```interactions. In quantum mechanics, the state vector tells you
everything that can be known about the consequences of the
```
```underlying
```
```dynamics.

```
```
A Hamiltonian must be specified.
```
```
If the Hamiltonian refers to more than one spacetime point, it is
non-local.

```
```

The Standard Model is local.

```
```In classical physics, you don't have non-separable
states, but you can get to non-local correlations using only
```
```local
```
```dynamics.
```
```
Only in the trivial, everyday, sense of Bertlmann's socks.

```
```In QM you can get to non-separable states using only local
dynamics.
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```
The non-separable state may be created at a single spacetime
```
```point,
```
```but that is not a relevant consideration if the parts then move
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```apart.
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```
```
```The mere fact that you can have non-classical entangled states
does not imply that the dynamics of the theory is non-local
```
```
The fact of non-separable entangled states, which are unique to
quantum mechanics, does imply non-locality.
Vide above....
You still have not shown me this magical local state that is
non-separable.
```
```
What matters is that the Hamiltonian is local.
```
```
Your Hamiltonian might be local. But that is not going to explain the
Bell correlations which involve measurements at two distinct spacetime
points. You are just sidestepping the issue -- show me this magical
local state that is non-separable.

The fact that you keep ducking and weaving on this question, and
similar questions, suggests quite strongly that you do not have an
answer -- that you do not have a local account of the correlations, in
MWI or in any other theory.

```
```
```
It's known that the laws of physics are local, the local account is just the time evolution starting from the start using the fundamental Hamiltonian that describes all the relevant degrees of freedom in the system. You keep on casting doubt on well established physics about the Standard Model, QFT and the way it leads to the effective models that can be used to describe lab experiments using polarizers.
```
Saibal

```
```Bruce

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