[ExI] Google’s Willow Quantum Chip: Proof of the Multiverse?

[Adrian Tymes]

On Tue, Oct 14, 2025 at 2:22 AM Ben Zaiboc via extropy-chat
<extropy-chat at lists.extropy.org> wrote:
> On 14/10/2025 04:31, Adrian Tymes wrote:
> > The AI explanation failed to address the question. Under MWI, the
> > worlds are separate after splitting, with no way to interact.  And
> > yet, this MWI explanation for this requires them to interact.  By what
> > means does the information get from one world to another after splitting?
>
> I don't claim to really understand this whole thing, but I was wondering
> about how a half-silvered mirror can create two photons without
> violating at least one conservation law, then realised that it doesn't,
> in the original world (I don't know about the other, presumably the
> photon existed in there all along, but not sure about that). After
> Adrian's comment above, I'm now wondering how the entanglement happens
> in the first place, if the two worlds can't interact?
>
> Not that I've ever understood what 'entanglement' actually means anyway.

The superdeterministic explanation of entanglement is:

* You have two particles.  (Or photons, or whatever.)
* You know that one is in one state (spin or some other paired
property), the other in the other, but you don't know which is which.
* These two start out in contact with one another (so there is no
problem "communicating" the state between them to start), but can be
separated by arbitrarily large distances while you still don't know
which one is in which state.
* The moment you figure out which one is in one state, you instantly
know the state of the other, no matter how far away it is.
* This doesn't violate light speed/causality/etc. because the result
of any action you take on this knowledge - and thus, the state of the
universe where the other particle's state is known - can only
propagate out at light speed from where and when you discovered the
first one's state.
* Not that that matters as much as it might seem, because the other
one was always in the state that it was in.  You just didn't know.

> Another thing that makes no sense to me is the issue of entire universes
> being 'created' whenever a quantum event takes place. Presumably that
> means that conservation laws only apply within each universe separately,
> and don't apply to a bunch of them.

Conservation laws apply within one universe.  It's not that the sum
between all universes is kept constant.  Equivalently, with MWI there
are an infinite number of universes following the same path; when they
split, some of these universes follow one path and the rest another
path, but each individual universe still conserves its own energy.