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Questions on Freidel's Group Field Theory (hep-th/050516)

  1. Nov 27, 2005 #1

    selfAdjoint

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    Questions on Freidel's "Group Field Theory (hep-th/050516)"

    In Laurent Freidel's general description of group field theory, http://arxiv.org/abs/hep-th/0505016, which I am studying as preparation for the paper on getting quantum dynamics out of kinematics which was recommended by Helge Rose', I have hit a question. So in case others may want to follow this course to exciting new results, I pose it here, and dignify it with a thread in expectation there will be other questions.
    Freidel says:
    My question is: how far is this invariance due to features of the Ponzano-Regge model and how far is it a combinatorial expression of the lack of local degrees of freedom in 2-D GR? In general how does the combinatorial structure of a spin-foam model relate to the underlying dynamics on the manifold being represented?
     
    Last edited: Nov 27, 2005
  2. jcsd
  3. Nov 27, 2005 #2
    I suppose you meant hep-th/0505016, "Group field theory: An overview"?
     
  4. Nov 27, 2005 #3

    selfAdjoint

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    Yes. Quoting from the conclusion:

     
  5. Nov 27, 2005 #4

    Kea

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    selfAdjoint

    It is basically a combinatorial expression of the lack of local degrees of freedom. The beauty of Ponzano-Regge was in actually constructing such an expression.

    Sorry, but your second question is a little vague to me.
    Kea :smile:
     
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