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Originally posted by LestatG
Facinating reading, I thought parallel universes and such were fantasy or loose theories. I'm going to walk the dog and get into it, thanks OP, I needed something interesting like this to go through.
Originally posted by LestatG
Facinating reading, I thought parallel universes and such were fantasy or loose theories. I'm going to walk the dog and get into it, thanks OP, I needed something interesting like this to go through.
Originally posted by zbeliever
So somewhere in my parallel lives I'm still married to husband number one?
Then in another I'm still married to husband number two?
OH BOY!!! Its a good thing I'm in this dimension...I wonder if somewhere out there, there is a "self" that has married number three....
Life is fun!!!
You only had to read the first paragraph. You mention two types, he mentions four types:
Originally posted by Faiol
lets use our brains people, the op is misleading
1 -a theory says we live in a multi universe place, with so many universes that we probably many almost identical to ours
2 - another one say for every decision we make or someone make, 2 universes are originated, it splits ...
both may be true
I ddnt read the guy's paper, I cant right now, someone needs to read and tell us which theory he believes, since, as I said, what the op said can mean 18i13u things
I survey physics theories involving parallel universes, which form a natural four-level hierarchy of multiverses allowing progressively greater diversity.
Level I: A generic prediction of inflation is an infinite ergodic universe, which contains Hubble volumes realizing all initial conditions including an identical copy of you about 10^10^29m away.
Level II: In chaotic ination, other thermalized regions may have different physical constants, dimensionality and particle content.
Level III: In unitary quantum mechanics, other branches of the wavefunction add nothing qualitatively new, which is ironic given that this level has historically been the most controversial.
Level IV: Other mathematical structures give different fundamental equations of physics.
The key question is not whether parallel universes exist (Level I is the uncontroversial cosmological concordance model), but how many levels there are. I discuss how multiverse models can be falsified and argue that there is a severe "measure problem" that must be solved to make testable predictions at levels II-IV.
Originally posted by Arbitrageur
You only had to read the first paragraph. You mention two types, he mentions four types:
Originally posted by Faiol
lets use our brains people, the op is misleading
1 -a theory says we live in a multi universe place, with so many universes that we probably many almost identical to ours
2 - another one say for every decision we make or someone make, 2 universes are originated, it splits ...
both may be true
I ddnt read the guy's paper, I cant right now, someone needs to read and tell us which theory he believes, since, as I said, what the op said can mean 18i13u things
At least he uses pretty, colorful pictures while he baffles us with BS.
I survey physics theories involving parallel universes, which form a natural four-level hierarchy of multiverses allowing progressively greater diversity.
Level I: A generic prediction of inflation is an infinite ergodic universe, which contains Hubble volumes realizing all initial conditions including an identical copy of you about 10^10^29m away.
Level II: In chaotic ination, other thermalized regions may have different physical constants, dimensionality and particle content.
Level III: In unitary quantum mechanics, other branches of the wavefunction add nothing qualitatively new, which is ironic given that this level has historically been the most controversial.
Level IV: Other mathematical structures give different fundamental equations of physics.
OK these are theories, which haven't been proven nor disproven and probably won't be. But then he says:
The key question is not whether parallel universes exist (Level I is the uncontroversial cosmological concordance model), but how many levels there are. I discuss how multiverse models can be falsified and argue that there is a severe "measure problem" that must be solved to make testable predictions at levels II-IV.
I beg to differ. Has the level I "uncontroversial cosmological concordance model" really been proven? I don't think so. While I don't disagree with the observations, I do disagree with the way those observations are interpreted and that the resulting models necessarily make the predictions he claims they do. So I think asking whether parallel universes exist is still a key question. Actually he says: "You probably find this idea strange and implausible, and I must confess that this is my gut reaction too." Yeah, I'm going with the author's gut reaction on this one.
It's not exactly a new paper, it's from January 23, 2003.
[edit on 30-6-2010 by Arbitrageur]