Higher order derivative coupling to gravity and its cosmological implications

doi:10.1103/PhysRevD.96.124028

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	Higher order derivative coupling to gravity and its cosmological implications
	Cai, Y ; Piao, YS
刊名	PHYSICAL REVIEW D
	2017
卷号	96 期号:12 页码:124028
关键词	FIELD-EQUATIONS INFLATION UNIVERSE BOUNCE MODEL
ISSN号	2470-0010
DOI	10.1103/PhysRevD.96.124028
英文摘要	We show that the R-(3)delta K operator in effective field theory is significant for avoiding the instability of nonsingular bounce, where R-(3) and K-mu nu are the three-dimensional Ricci scalar and the extrinsic curvature on the spacelike hypersurface, respectively. We point out that the covariant Lagrangian of R-(3)delta K, i.e., L-R(3)delta K, has the second order derivative couplings of scalar field to gravity which do not appear in Horndeski theory or its extensions but does not bring the Ostrogradski ghost. We also discuss the possible effect of L-R(3)delta K on the primordial scalar perturbation in the inflation scenario.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22993]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Cai, Yong 2.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Cai, Y,Piao, YS. Higher order derivative coupling to gravity and its cosmological implications[J]. PHYSICAL REVIEW D,2017,96(12):124028.
APA	Cai, Y,&Piao, YS.(2017).Higher order derivative coupling to gravity and its cosmological implications.PHYSICAL REVIEW D,96(12),124028.
MLA	Cai, Y,et al."Higher order derivative coupling to gravity and its cosmological implications".PHYSICAL REVIEW D 96.12(2017):124028.