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Local interpretations of quantum mechanics

  1. Mar 2, 2012 #1
    I was wondering if anyone knows whether there exist strictly local interpretations of quantum mechanics. I understand that Bell's theorem tells us that any hidden variable theory must be non-local if it is to give QM. But what about other interpretations such as many worlds? It is obvious that wave function collapse is non-local so any interpretation that views this as a real process must be non-local. This is why my guess is that MW could be local since there is no physical collapse. What about decoherent histories?

    Thanks,

    Fin.
     
  2. jcsd
  3. Mar 2, 2012 #2
    Try this blog:

    https://www.physicsforums.com/blog.php?b=3622 [Broken]
     
    Last edited by a moderator: May 5, 2017
  4. Mar 5, 2012 #3

    Demystifier

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    Finbar, as you can see at my blog mentioned above, both MW and decoherent histories are local in a certain sense, but with a big price to pay for that.
     
  5. Mar 5, 2012 #4

    DrChinese

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    In addition to those mentioned above, there is another important class of local interpretations: the Time Symmetric group. In these, the causal light cone extends in both directions of time. This gives the appearance of non-locality but c is still a limiting factor for propagation of effects.

    Here are a couple of references to get you started on these:

    http://arxiv.org/abs/0706.1232
    New Insights on Time-Symmetry in Quantum Mechanics
    Yakir Aharonov, Jeff Tollaksen (2007)

    http://arxiv.org/abs/0908.4348
    Relational Blockworld: A Path Integral Based Interpretation of Quantum Field Theory
    W.M. Stuckey, Michael Silberstein, Timothy McDevitt
     
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