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Obviously, in MWI, it is postulated that there is a universe for every possible outcome of every quantum event which occurs in the universe. I was wondering, would all of these universes share the same physical laws, or does it go beyond that, to where there are different universal branches for the different laws of physics. I'm not asking about general cosmology, but rather just which one Everett was referring to. Does the MWI multiverse contain only universes which share the same physical laws, or are alternative physical laws also possible?

For instance, if I were to travel through the MWI multiverse, could I only go to alternative universes in which, say, I became a rock star, or would I be able to go into, say, the world of a Looney Tunes Cartoon or world like Harry Potter, which have alternate physical laws altogether?

IIRC, I do believe it is limited to universes which contain the physical laws and constants. I just wanted to be certain.

We've been over this. The state vectors of the Hilbert space describing a system's quantum range are not alternate physical states.

Would perceiving a particle's quantum superposition be equivalent to determining it's position and momentum simultaneously?

Originally posted by Lestov16
Would perceiving a particle's quantum superposition be equivalent to determining it's position and momentum simultaneously?

It would certainly be much less useful, more of a probabilistic blur than anything else.

Originally posted by Lestov16
Would perceiving a particle's quantum superposition be equivalent to determining it's position and momentum simultaneously? http://en.wikipedia.org/wiki/Uncertainty_principle

Originally posted by Lestov16
Obviously, in MWI, it is postulated that there is a universe for every possible outcome of every quantum event which occurs in the universe. I was wondering, would all of these universes share the same physical laws, or does it go beyond that, to where there are different universal branches for the different laws of physics. I'm not asking about general cosmology, but rather just which one Everett was referring to. Does the MWI multiverse contain only universes which share the same physical laws, or are alternative physical laws also possible?
http://physics.about.com/od/astronomy/f/ParallelUniverseTypes.htm

http://physics.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=physics&cdn=education&tm=25&f=00&su=p284.13.342.ip_&tt=65&bt=2&bts=45&zu=http%3A//space.mit.edu/home/tegmark/multiverse.pdf