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

[Jason Resch]

On Sat, Nov 8, 2025, 11:59 AM Adrian Tymes via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> 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.
>

But this explanation is insufficient, as the results you see will depend on
how each of the two particles will later be measured. And they might be
separated by vast distances by the time they are measured, and hence will
not be able (in theory) to coordinate the measurement results they reflect.

Superdeterminism, accordingly, requires that that foreknowledge regarding
how each particle will eventually be measured, must be factored into the
creation of that particle pair at the time it is formed.

And then let's say we use two radioactive decay processes to decide how we
choose to measure each particle before it arrives. Then the particle
creation event all those light years away must have also known how those
radio active decay processes would later unfold.

Jason


> > 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.
>
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