(adsbygoogle = window.adsbygoogle || []).push({}); Krasnov action--start of a new spinfoam?

The Krasnov action has been offered as a possible basis for a new spinfoam model, in which the effective constants like G Newton would run with scale. This would differ from usual GR at extremely small scale (or in some other extreme regime) but might still have the usual largescale behavior.

This is discussed in a short paper posted recently:

http://arxiv.org/abs/0907.4064

Gravity as BF theory plus potential

Kirill Krasnov

7 pages, published in Proceedings of the Second Workshop on Quantum Gravity and Noncommutative Geometry (Lisbon, Portugal)

(Submitted on 23 Jul 2009)

"Spin foam models of quantum gravity are based on Plebanski's formulation of general relativity as a constrained BF theory. We give an alternative formulation of gravity as BF theory plus a certain potential term for the B-field. When the potential is taken to be infinitely steep one recovers general relativity. For a generic potential the theory still describes gravity in that it propagates just two graviton polarizations. The arising class of theories is of the type amenable to spin foam quantization methods, and, we argue, may allow one to come to terms with renormalization in the spin foam context."

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Krasnov action-start of a new spinfoam?

Loading...

Similar Threads - Krasnov action start | Date |
---|---|

A String perturbation equations from Polyakov action | Jul 4, 2017 |

PCF Pure Connection Formulation of GR now QG: Krasnov Delfino Scarinci | Jun 18, 2013 |

Gravity as a diffeomorphism invariant gauge theory (new Krasnov paper) | Jan 26, 2011 |

Krasnov framework for asymptotic safety in QG (Perimeter video) | May 7, 2010 |

Gravity-Yang-Mills-Higgs unification bid by Krasnov and Gomez | Nov 20, 2009 |

**Physics Forums - The Fusion of Science and Community**