Nonperturbative renormalization group for Einstein gravity with matter
Departamento de Física, Universidad del Valle - A.A. 25360, Cali,
Accepted: 2 April 1998
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 crucially on the choice of scalar-gravitational coupling ξ and the number of scalar fields.
PACS: 04.62.+v – Quantum field theory in curved spacetime / 04.60.-m – Quantum gravity / 12.10.Dm – Unified theories and models of strong and electroweak interactions
© EDP Sciences, 1998