Scaling solutions for dilaton quantum gravity

被引：43

作者：

Henz, T. ^{[1
]}

Pawlowski, J. M. ^{[1
]}

Wetterich, C. ^{[1
]}

机构：

[1] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 16, D-69120 Heidelberg, Germany

来源：

PHYSICS LETTERS B | 2017年 / 769卷

基金：

欧洲研究理事会;

关键词：

ASYMPTOTIC SAFETY; RENORMALIZATION-GROUP; EVOLUTION EQUATION; FIXED-POINTS; ORIGIN;

D O I：

10.1016/j.physletb.2017.01.057

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Scaling solutions for the effective action in dilaton quantum gravity are investigated within the functional renormalization group approach. We find numerical solutions that connect ultraviolet and infrared fixed points as the ratio between scalar field and renormalization scale k is varied. In the Einstein frame the quantum effective action corresponding to the scaling solutions becomes independent of k. The field equations derived from this effective action can be used directly for cosmology. Scale symmetry is spontaneously broken by a non-vanishing cosmological value of the scalar field. For the cosmology corresponding to our scaling solutions, inflation arises naturally. The effective cosmological constant becomes dynamical and vanishes asymptotically as time goes to infinity. (C) 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.

引用

页码：105 / 110

页数：6

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