Renormalization Group Flow of the Holst Action

Details Renormalization Group Flow of the Holst Action Renormalization Group Flow of the Holst Action

2010-12-20

arxiv.org/abs/1012.4280v2

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, 1 figure

Scientific paper

The renormalization group (RG) properties of quantum gravity are explored, using the vielbein and the spin connection as the fundamental field variables. The scale dependent effective action is required to be invariant both under space time diffeomorphisms and local frame rotations. The nonperturbative RG equation is solved explicitly on the truncated theory space defined by a three parameter family of Holst-type actions which involve a running Immirzi parameter. We find evidence for the existence of an asymptotically safe fundamental theory, probably inequivalent to metric quantum gravity constructed in the same way.

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