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B About not unique in GR

  1. Nov 18, 2016 #1
    I know that motion equation in field theory deriving in GR is not uniquely.How do we solve this ambiguousness of QFT in curved spcetime?
     
  2. jcsd
  3. Nov 18, 2016 #2

    atyy

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    In the classical theory, one way is to also require the condition that spacetimes be globally hyperbolic.
     
  4. Nov 19, 2016 #3

    martinbn

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    It isn't very clear what the question is. What non-uniqueness are you reffering to?
     
  5. Nov 19, 2016 #4
    Eg, we can have two forms of Klein-Gordon equation of scalar field in GR,
     
  6. Nov 19, 2016 #5

    PeterDonis

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    Can you write them down?
     
  7. Dec 14, 2016 #6
    See page70 General Relativity of Wald.
     
  8. Dec 14, 2016 #7

    PeterDonis

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    Sorry, if you can't even be bothered to post the equations you're asking about, we can't be bothered to reply. Thread closed.
     
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