Fab 5: noncanonical kinetic gravity, self tuning, and cosmic acceleration

被引：57

作者：

Appleby, Stephen A. ^{[1
]}

De Felice, Antonio ^{[2
]}

Linder, Eric V. ^{[1
,3
,4
]}

机构：

[1] Ewha Womans Univ, Inst Early Universe WCU, Seoul, South Korea

[2] Naresuan Univ, Inst Fundamental Study, NEP, ThEPs CRL, Phitsanulok 65000, Thailand

[3] Univ Calif Berkeley, Berkeley, CA 94720 USA

[4] Berkeley Lab, Berkeley, CA 94720 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 10期

基金：

新加坡国家研究基金会;

关键词：

dark energy theory; modified gravity; gravity; PERTURBATIONS; COSMOLOGY; F(R;

D O I：

10.1088/1475-7516/2012/10/060

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate circumstances under which one can generalize Horndeski's most general scalar-tensor theory of gravity. Specifically we demonstrate that a nonlinear combination of purely kinetic gravity terms can give rise to an accelerating universe without the addition of extra propagating degrees of freedom on cosmological backgrounds, and exhibit self tuning to bring a large cosmological constant under control. This nonlinear approach leads to new properties that may be instructive for exploring the behaviors of gravity.

引用

页数：22

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