I MWI: Are There Worlds Where the Rules Don't Apply?

[WWGD]

TL;DR Summary

Are there worlds where MWI does not hold?

Summary: Are there worlds where MWI does not hold?

(I made a comment on this but I lost track of it).
I hope this makes sense:
Does MWI allow for worlds were MWI itself does not apply? Where rules of Physics as we know, understand, don't apply? If so, is our world one of these?

 

[PeterDonis]

Does MWI allow for worlds were MWI itself does not apply?

What would this even mean?

Where rules of Physics as we know, understand, don't apply?

If the rules of physics we know don't apply, we have no way of telling what would happen, so this question is unanswerable.

 

[WWGD]

I meant if there is a branching into worlds , some where MWI itself applies and some where it does not?

 

[PeterDonis]

I meant if there is a branching into worlds , some where MWI itself applies and some where it does not?

What would this even mean?

I think you need to go back and consider the strong possibility that the question you are asking does not even make sense.

 

[WWGD]

Ok, please delete. Will rethink.

 

[atyy]

Summary: Are there worlds where MWI does not hold?

(I made a comment on this but I lost track of it).
I hope this makes sense:
Does MWI allow for worlds were MWI itself does not apply? Where rules of Physics as we know, understand, don't apply? If so, is our world one of these?

MWI is sometimes criticized on the basis that there might be worlds in which an observer cannot verify that the standard postulates of quantum mechanics are good descriptions of what he observes.

 

[WWGD]

I was aiming for a Godel -like approach , though clearly mine was without as much success.

 

[PeterDonis]

MWI is sometimes criticized on the basis that there might be worlds in which an observer cannot verify that the standard postulates of quantum mechanics are good descriptions of what he observes.

Yes, but the MWI itself does not claim this, and in fact claims the opposite.

Also, any such criticism has to be based on applying those same laws of quantum mechanics.

 

[pinball1970]

Ok, please delete. Will rethink.

I was thinking liars paradox before you stated Gödel
I wondered if there was a link between incompleteness and uncertainty and I am sure it's been discussed on pf. I'll have a look!

 

[WWGD]

I was thinking liars paradox before you stated Gödel
I wondered if there was a link between incompleteness and uncertainty and I am sure it's been discussed on pf. I'll have a look!

Thanks, Pinball, I think Godel used the Liar's paradox.

 

[pinball1970]

Thanks, Pinball, I think Godel used the Liar's paradox.

Yes there are papers on Godel and Heisenberg on line like this one https://arxiv.org/abs/quant-ph/0402197

I am sure the MWI has had similar questions, is there a world in one of the many worlds where the many world theory does not apply? If it does apply than that world cannot exist if it does not apply then every possible world is not allowed. MW I don't think means every possible world, I still have to finish my Sean Carroll book.

I don't want Peter Donis jumping on me for considering this, its fun trying to join those two things.

As an aside Godel and Heisenberg published around the same time, late 20s early 30s. Incompleteness in mathematics and the probabilistic/ unknowable nature of physics within a few years of each other.

It must have been a time of uncertainty.

 

[PeterDonis]

I don't want Peter Donis jumping on me for considering this

It's irrelevant to the topic of this thread, which is specifically about the MWI. The uncertainty principle is not specific to the MWI, it's part of the basics of QM, independent of any interpretation.

 

[PeterDonis]

The OP question has been addressed. Thread closed.