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Proper time flow equation for gravity

Alfio Bonanno1,2 and Martin Reuter3

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We analyze a proper time renormalization group equation for Quantum Einstein Gravity in the Einstein-Hilbert truncation and compare its predictions to those of the conceptually different exact renormalization group equation of the effective average action. We employ a smooth infrared regulator of a special type which is known to give rise to extremely precise critical exponents in scalar theories. We find perfect consistency between the proper time and the average action renormalization group equations. In particular the proper time equation, too, predicts the existence of a non-gaussian fixed point as it is necessary for the conjectured nonperturbative renormalizability of Quantum Einstein Gravity.


Keywords

Nonperturbative Effects

Models of Quantum Gravity

Renormalization Group

 

E-print Number: hep-th/0410191

Cited: by |

Refers: to

PACS

04.60.-m Quantum gravity

11.10.Hi Renormalization group evolution of parameters

Subjects

Gravitation and cosmology

Particle physics and field theory

Dates

Issue 02 (February 2005)

Received 20 October 2004, accepted for publication 10 February 2005

Published 15 March 2005



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