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Cai, Y; Piao, YS
Higher order derivative coupling to gravity and its cosmological implications
Source PublicationPHYSICAL REVIEW D
AbstractWe 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.
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
Indexed BySCIE
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.[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
Recommended Citation
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.
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