Fixed points of higher-derivative gravity

被引：228
作者：
Codello, Alessandro
Percacci, Roberto
机构：
[1] Univ Trieste, Dipartimento Fis Teor, I-34014 Trieste, Italy
[2] SISSA, I-34014 Trieste, Italy
[3] Ist Nazl Fis Nucl, Trieste, Italy
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.97.221301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We recalculate the beta functions of higher-derivative gravity in four dimensions using the one-loop approximation to an exact renormalization group equation. We reproduce the beta functions of the dimensionless couplings that were known in the literature, but we find new terms for the beta functions of Newton's constant and of the cosmological constant. As a result, the theory appears to be asymptotically safe at a non-Gaussian fixed point rather than perturbatively renormalizable and asymptotically free.
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页数：4
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