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Thread: Does the parallel universes actually exist in the many worlds interpretation?

  1. #1 Does the parallel universes actually exist in the many worlds interpretation? 
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    According to the official interpretation, do the parallel universes exist?

    or is the interpretation just to clarify for others e.g.
    Schrödinger's cat, could be alive or dead, just to interpret to others that radioactive decay would unpredictably happen at any point of time, as nothing causes it to happen?

    wikipedia is really messy, some people say they exist, and others say no.


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  3. #2  
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    Good question, but they called it in name


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  4. #3  
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    Quote Originally Posted by ryanawe123 View Post
    According to the official interpretation, do the parallel universes exist?

    or is the interpretation just to clarify for others e.g.
    Schrödinger's cat, could be alive or dead, just to interpret to others that radioactive decay would unpredictably happen at any point of time, as nothing causes it to happen?

    wikipedia is really messy, some people say they exist, and others say no.
    You're asking a very deep question, because it hinges on what "reality" means. The reason for the varying answers you've uncovered is undoubtedly due to different -- often implicit -- working definitions of reality.

    Everett's many-worlds interpretation (MWI) guarantees that we can never measure what happens in these other worlds (they are "orthogonal" to ours, not "parallel"). If you are a "hard realist" (meaning that things you could never measure -- even in principle -- might as well be treated as not existing), then you say that these other worlds do not exist. If you are a "soft realist," you would say that, because the equations are the same for our world and all the others, these other worlds are just as real as ours.

    Because there is no experimental way to answer the question definitively, we are forced to concede that the question lies outside of science. It is one for the philosophers.
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  5. #4  
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    So, does Everett believed that the other worlds exist?

    Or in his interpretation, was he just trying to simplify to public, who didn't understand what he was trying to say,
    that "the cat may not have died at that exact moment, there are other possible worlds where the cat would still be alive, or died earlier" and the MWI was just an interpretation he was giving them to help them understand,

    but what goes into the public's head was: "he says that the world splits into infinity worlds, and those worlds exist".



    so, did Everett believe the worlds exist? (or what does his diary say?) if he had any

    [technically, i think it does not, lol]
    Last edited by RamenNoodles; March 18th, 2013 at 10:27 PM.
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