Nonperturbative renomalization group for Einstein gravity with matter

Details Nonperturbative renomalization group for Einstein gravity with matter Nonperturbative renomalization group for Einstein gravity with matter

2005-01-28

arxiv.org/abs/hep-th/0501225v1

Europhys.Lett. 42 (1998) 487-492

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, LaTeX, a few typos corrected

Scientific paper

10.1209/epl/i1998-00278-2

we investigate the exact renormalization group (RG) in Einstein gravity coupled to N-component scalar field, working in the effective average action formalism and background field method. The truncated evolution equation is obtained for the Newtonian and cosmological constants. We have shown that screening or antiscreening behaviour of the gravitational coupling depends cricially on the choice of scalar-gravitational $\xi $ and the number of scalar fields.

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