QCD analogy for quantum gravity

  title={QCD analogy for quantum gravity},
  author={Bob Holdom and Jing Ren},
  journal={Physical Review D},
Quadratic gravity presents us with a renormalizable, asymptotically free theory of quantum gravity. When its couplings grow strong at some scale, as in QCD, then this strong scale sets the Planck mass. QCD has a gluon that does not appear in the physical spectrum. Quadratic gravity has a spin-2 ghost that we conjecture does not appear in the physical spectrum. We discuss how the QCD analogy leads to this conjecture and to the possible emergence of general relativity. Certain aspects of the QCD… 

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Scholarpedia 10

  • 32243
  • 2015

Living Rev

  • Relativity 7, 5
  • 2004

For a review of QCD Green functions, see R. Alkofer and L. von Smekal

  • Phys. Rep
  • 2001

) ; G . Narain and R . Anishetty

  • J . Phys . Conf . Ser .
  • 2012

) . [ 28 ] A . Salvio and A . Strumia

  • Eur . Phys . J . C Phys . Rev . D


  • Phys. 37, 532 (2007); C. M. Bender and P. D. Mannheim, Phys. Rev. Lett. 100, 110402
  • 2008

Nuovo Cimento Soc

  • Ital. Fis. 50B, 303
  • 1979

) . [ 43 ] N . Vandersickel and D . Zwanziger

  • 1989


  • Math. Phys. 60, 7
  • 1978