Nonperturbative renormalization group for Einstein gravity with matter

被引：9

作者：

Granda, LN ^{[1
]}

机构：

[1] Univ Valle, Dept Fis, Cali, Colombia

来源：

EUROPHYSICS LETTERS | 1998年 / 42卷 / 05期

关键词：

D O I：

10.1209/epl/i1998-00278-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 xi and the number of scalar fields.

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收藏

页码：487 / 492

页数：6

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