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B Improbability of the Many-Worlds Interpretation?

  1. Mar 5, 2017 #1

    TheBlackAdder

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    If the MWI would be true, wouldn't there be at least one reality where human civilization advanced much faster than we did and therefore: contacted all other universes; destroyed all the universes; colonized all other universes; etc.

    Since, as far as we know, this has not happened, doesn't this make the MWI improbable?
     
  2. jcsd
  3. Mar 5, 2017 #2
    As far as I know, most and maybe all MWI proposals have the different worlds causally disconnected.
    So whatever goes on in world A can never affect events in world B.
    No matter how advanced a civilization may be, it simply isn't possible for it do anything to entities in a hypothetical alternate timeline.
     
  4. Mar 6, 2017 #3

    stevendaryl

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    It's not quite comparable, but it reminds me of a comic about an alien race so technologically advance that they can travel from the comic book to the real world. Now, that would be scary.
     
  5. Mar 6, 2017 #4

    DrChinese

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    As I understand MWI, there is no expectation that all permutations of nature exist. For example, there is no guarantee that there is a world in which I became the US President in 2017. Accordingly, there would be no guarantee that the advanced civilization you imagine exists.
     
  6. Mar 6, 2017 #5
    These "other universes" are not other places, but other possibilities. How do you colonize another possibility?
     
  7. Mar 6, 2017 #6

    TheBlackAdder

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    If there is a reasonable possibility some other universe—a place—exists, it might be possible to colonize it. No?

    Has it been proved that traveling to another universe is impossible? I'm just a layman with a question. I'm not defending my theory or anything. It just seems to me, if traveling to another universe hasn't been disproved, it might be possible.
     
  8. Mar 6, 2017 #7
    I think one reason for it to be impossible could be conservation of energy: if one copy of you goes to A and another copy to B, then, if A travels to B, there would be two copies in one universe for instance.
     
  9. Mar 6, 2017 #8

    DrChinese

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    Since no one has proved that there are any other universes to travel to yet, it might be difficult to prove it can't be done.

    But regardless: you misunderstand scientific theory if you think that it's about imagining something and then doing it. As a general rule, the purpose is not to think up things you can disprove. Rather: Theory is a useful description of some pattern which applies to some scope.
     
  10. Mar 6, 2017 #9

    bhobba

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    You are assuming such is possible. In the MW interpretation its not possible to contact the other worlds.

    Thanks
    Bill
     
  11. Mar 6, 2017 #10

    bhobba

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    Of course not - but the theory pretty much says they are separate and remain so without delving into the details.

    Basically MW is an interpretive thing. After decoherence you have a number of possible outcomes. MW interprets those outcomes as separate worlds - that they cant communicate is pretty much implied by defining what they are. Does it prove it - of course not - the definition doesn't say that - but it would seem at odds with its intent.

    Thanks
    Bill
     
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