- #1
murray92
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I would be interested in your opinion about:
arXiv:1006.0984v1:
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...
arXiv:1006.0984v1:
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...