Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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?


  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


    User Avatar
    Science Advisor

    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


    User Avatar
    Science Advisor
    Gold Member

    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:

    New Insights on Time-Symmetry in Quantum Mechanics
    Yakir Aharonov, Jeff Tollaksen (2007)

    Relational Blockworld: A Path Integral Based Interpretation of Quantum Field Theory
    W.M. Stuckey, Michael Silberstein, Timothy McDevitt
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook