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A An Undecidable Problem in QM

  1. Dec 11, 2015 #1
    There is a group of researchers that say that there is a problem in QM (the spectral gap problem) that is undecidable in general


    http://www.nature.com/news/paradox-...-unanswerable-1.18983?WT.mc_id=TWT_NatureNews
    http://www.nature.com/nature/journal/v528/n7581/full/nature16059.html


    I'm finding it very interesting, but my grasp of condensed matter physics and Gödel theory is limited so I'm unsude. it would be great if anyone can explain to me what the result actually is.
     
    Last edited by a moderator: May 7, 2017
  2. jcsd
  3. Dec 11, 2015 #2

    jedishrfu

    Staff: Mentor

    There is aleady a thread on this paper here:

    https://www.physicsforums.com/threads/spectral-gap-or-gapless-undecidable.847554/

    The simple answer is that our math won't always able to predict what happens to a QM given system of particles. However, nature will know what to do and so our math is incomplete.

    Godel's proof showed that in any given system of logic there will always be some statements which cannot be proven true or false and so are undecidable statements.

    http://www.scientificamerican.com/article/what-is-godels-theorem/

    Closing thread...
     
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