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by GoblinSlayer 367 days ago
In MWI the Born rule is a tendency of statistics of a long string of measurements. You tried to get this statistics from one measurement, which didn't work. If you want to see how MWI produces the Born rule, you should calculate statistics of a long string of measurements and see that this statistics is asymptotically close to Born statistics.

Other branches can be demonstrated indirectly by 1) quantitatively verifying unitary dynamics, 2) indirectly observing branching, 3) demonstrating that other theories are wrong. Branches are just superposition, if you want to eliminate branches, you should eliminate superposition with pilot wave or superdeterminism or something like that. This kind of unobservability isn't unique to MWI, in general theory of relativity we observe only a part of the universe, the rest being beyond event horizon and is unobservable. Do you believe only observable part of the universe exists and beyond it nothing exists?
1 comments
lisper 367 days ago
> You tried to get this statistics from one measurement

Huh??? When?

> Other branches can be demonstrated

Sure, that's just QM 101. What you cannot demonstrate experimentally, not even in principle, is the existence of other branches with different macroscopic configurations than our own. Such branches are IPUs.

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GoblinSlayer 367 days ago
>Huh??? When?

In the blog post you linked above:

>No, it isn't because it can't account for the Born rule. See:

>https://blog.rongarret.info/2019/07/the-trouble-with-many-wo...

>What you cannot demonstrate experimentally, not even in principle

I provided 3 ways to demonstrate it experimentally, even in principle, not sure what problem you have.

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lisper 367 days ago
> In the blog post you linked above

Again, huh??? Where in that blog post do I try to "get this [sic] statistics from one measurement"?

> I provided 3 ways to demonstrate it experimentally, even in principle, not sure what problem you have.

No, you didn't. You apparently don't understand what is meant by "branches with different macroscopic configurations than our own" and I don't have time to explain it to you. Sorry. Go read up on decoherence, and then come back and describe an experiment that can demonstrate the existence of a fully decohered branch. You can't, because if you could it would by definition not be fully docohered.

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GoblinSlayer 366 days ago
>Where in that blog post do I try to "get this [sic] statistics from one measurement"?

In the discussion how different people place bets on A and B outcomes of experiment. Well, you didn't state clearly why you believe that MWI doesn't account for Born rule. MWI accounts for Born rule as statistics of measurements, and the discussion of bets is the closest this in that blog post to consideration of statistics of measurements, but that discussion seemingly considers one measurement, that's why it doesn't see statistics.

>Go read up on decoherence, and then come back and describe an experiment that can demonstrate the existence of a fully decohered branch.

It looks like a logical problem to me. You suggest that decoherence both produces and doesn't produce fully decohered branches? Violation of the law of excluded middle? If the law of excluded middle doesn't work, I don't think experiments can demonstrate anything.

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lisper 366 days ago
> you didn't state clearly why you believe that MWI doesn't account for Born rule

That's what the whole post was about. The MWI doesn't account for the Born rule unless you add additional, questionable assumptions like branch indifference to the SE.

> You suggest that decoherence both produces and doesn't produce fully decohered branches?

No, that is not even remotely what I am saying. You are beginning to sound like a troll.

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