I like how Max Tegmark calssified the multiverses into level I, II, II, and IV level multiverses. Level I multiverse is other bubble universes existing in our same spacetime -- that shall we say "froze", out from an underlying state of eternal inflation -- and which has a high degree of measured flatness and could fit a huge number of bubble universes in it that are outside of our cosmic horizon i.e. whose light has yet to reach our own observable bubble universe (and may not reach it for trillions of years) Level II multiverse is the multiverse of the infinite (or hugely vast number) of other possible physical realities that would manifest by changing the value of one or more of the fundamental constants. He calls this "effective laws" of physics to distinguish them from a more fundamental (and highly abstract) physics that does not depend on specific values of these constants. Level II is the Everett MWI multiverse indicated by quantum mechanics. Level IV -- is a proposed multiverse where other fundamental mathematical structures (that underlie physical manifested reality which we experience and measure) give rise to different fundamental equations of physics.
So far -- as far as I know (which may quite possibly be not be much <grin>) -- this seems to be the best attempt at providing a classification of the various kinds of multiverses I have seen. One speculation Max Tegmark made in his book the Mathematical Universe is that it could be possible that the perhaps infinite numbers of level I and level III universes might map onto each other... in other words that they might be two avenues for explaining why these other universes exist -- there is a infinite or very nearly infinite volume of spacetime in which they can exist and yet be completely hidden from us and for the MWI of quantum physics suggesting that there is a branching process going on at each quantum "choice". The infinite (or hugely numerous) number of potential Level I universes might be one and the same with the also hugely numerous level III (MWI) universes. This all gets supremely abstract and is excluded fro the realm of the observable being only indirectly inferred based on an understanding of inflation and quantum mechanics. Chris ________________________________ From: Richard Ruquist <yann...@gmail.com> To: everything-list@googlegroups.com Sent: Wednesday, July 23, 2014 9:42 AM Subject: Re: The Higgs and "SUSY vs the Multiverse" > I hope you are not confusing the MV multiverse with the Everett MWI > multiverse It seems that John Clark is. On Wed, Jul 23, 2014 at 12:24 PM, John Clark <johnkcl...@gmail.com> wrote: On Mon, Jul 21, 2014 LizR <lizj...@gmail.com> wrote: > > >> For the purposes of this thread I'm specifically interested in whether the >> MV "opposes" supersymmetry in some sense. > > >Not really. If String Theory is true there are at least 10^500 other universes >with different laws of physics and maybe a infinite number, but Supersymmetry >is a narrower idea than String Theory. Supersymmetry is consistent with >String Theory but does not require it. So Supersymmetry could be true but >String Theory false. And Supersymmetry is not dead yet but it's not looking >very healthy right now; most thought that when the LHC came online we'd find >Supersymmetry almost immediately, but instead there is still not even a hint >of it. > > >> I hope you are not confusing the MV multiverse with the Everett MWI >> multiverse >> > > >It's conceivable they are the same thing, that's why I thought the discovery >of the polarization variation of the Big Bang microwaves was such a big deal. >Inflation theory predicted that the enormous acceleration of the very early >universe would create gravity waves that would distort the Big Bang >microwaves in a certain way and that is what seems to have been discovered in >March. > >Alan Guth postulated a inflation field that decayed away in a process >somewhat analogous to radioactive half life, and after the decay the universe expanded at a much much more leisurely pace. But then Andre Linde proved that for Guth's idea to work the inflation field had to expand faster than it decayed, Linde called it "Eternal Inflation". Linde showed that for every volume in which the inflation field decays away 2 other volumes don't decay. So one universe becomes 3, the field decays in one universe but not in the other 2, then both of those two universes splits in 3 again and the inflation field decays away in one and doesn't decay in 2 others, and it goes on forever. So what we call "The Big Bang" isn't the beginning of everything it's just the end of inflation in our particular part of the universe. So according to Linde this field created one Big Bang, then 2, then 4, then 8, then 16 etc in a unending process. Maybe in one of those universes Schrodinger's cat is dead and in another the cat is alive. > > >So if that variation of the Big Bang microwaves turns out to be real (and we >should know by Christmas) it would be a big shot in the arm for Everett. > > > John K Clark > > > > > -- >You received this message because you are subscribed to the Google Groups >"Everything List" group. >To unsubscribe from this group and stop receiving emails from it, send an >email to everything-list+unsubscr...@googlegroups.com. >To post to this group, send email to everything-list@googlegroups.com. >Visit this group at http://groups.google.com/group/everything-list. >For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. 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