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Does killed by Dvali,Folkerts, Germani-paper?

  1. Jun 8, 2010 #1
    I would be interested in your opinion about:


    Physics of Trans-Planckian Gravity
    Authors: Gia Dvali, Sarah Folkerts, Cristiano Germani
    (Submitted on 4 Jun 2010)

    Abstract: We study aspects of the phenomenon of gravitational UV-self-completeness and its implications for deformations of Einstein gravity. In a ghost-free theory flowing to Einstein gravity in the IR trans-Planckian propagating quantum degrees of freedom cannot exist. The only physical meaning of a trans-Planckian pole is the one of a classical state (Black Hole) which is fully described by the light IR quantum degrees of freedom and gives exponentially-suppressed contributions to virtual processes. In this sense Einstein gravity is UV self-complete, although not Wilsonian. We show that this UV/IR correspondence puts a severe constraint on any attempt of conventional Wilsonian UV-completion of trans-Planckian gravity. In particular, there is no well-defined energy domain in which gravity could become asymptotically weak or safe.

    Does this paper kill asymptotic safety as a approch twoards QG?

    Damn the title doesn't make much sense!! Can anyone explain how to edit it....
  2. jcsd
  3. Jun 8, 2010 #2
    ``Killing'' of anything is always relative.

    You can always find a way to cook up something that evades a no-go theorem like this, which is (I'm sure) what the asymptotic safety people are busy doing.
  4. Jun 8, 2010 #3


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    Dearly Missed

    No, in fact it doesn't. What seems a good deal clearer and more knowledgeable discussion, which might interest you, came out about the same time by Dave Mattingly et al.

    Asymptotic Safety, Asymptotic Darkness, and the hoop conjecture in the extreme UV

    "...Extending a proof of the hoop conjecture for spherical symmetry to include higher curvature terms we investigate this minimum length argument when the gravitational couplings run with energy in the manner predicted by asymptotically safe gravity. We show that argument for the mandatory formation of a black hole within the domain of an experiment fails..."
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