A Class of Renormalization Group Invariant Scalar Field Cosmologies

被引：0
|
作者：
Alfio Bonanno
Giampiero Esposito
Claudio Rubano
机构：
[1] INAF,Osservatorio Astrofisico di Catania
[2] INFN,Sezione di Catania
[3] Complesso Universitario di Monte S. Angelo,INFN, Sezione di Napoli
[4] Complesso Universitario di Monte S. Angelo,Dipartimento di Scienze Fisiche
[5] Istituto Nazionale di Fisica Nucleare,Sezione di Napoli)
来源：
General Relativity and Gravitation | 2003年 / 35卷
关键词：
Cosmology; scalar field; renormalization;
D O I：
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学科分类号：
摘要：
We present a class of scalar field cosmologies with a dynamically evolving Newton parameter G and cosmological term Λ. In particular, we discuss a class of solutions which are consistent with a renormalization group scaling for G and Λ near a fixed point. Moreover, we propose a modified action for gravity which includes the effective running of G and Λ near the fixed point. A proper understanding of the associated variational problem is obtained upon considering the four-dimensional gradient of the Newton parameter.
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页码：1899 / 1907
页数：8
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