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Is there an effect of a nontrivial c(T) during inflation?
Cai, Y; Wang, YT; Piao, YS; Piao, YS (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.; Piao, YS (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
2016
发表期刊PHYSICAL REVIEW D
卷号93期号:6页码:63005
文章类型Article
摘要Recently, we have shown that the propagation speed c(T) of the primordial gravitational waves (GWs) might be nontrivially varying during inflation, which could induce local oscillations in the power spectrum of primordial GWs. In this paper, we numerically confirm that, although with a disformal redefinition of the metric the nontrivial c(T) may be set as unity, the power spectrum in the frame with c(T) = 1 is completely the same as that in the original disformal frame, i.e., the oscillating shape in the power spectrum is still reserved, since here the effect of c(T) is actually encoded in the nontrivially varying Hubble parameter. In addition, we also clarify how to obtain a blue-tilted GWs spectrum by imposing a rapidly decreasing c(T) during inflation.
学科领域Astronomy & Astrophysics ; Physics
资助者NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000]
DOIhttp://dx.doi.org/10.1103/PhysRevD.93.063005
关键词[WOS]FIELD-EQUATIONS ; COSMOLOGY ; UNIVERSE ; PERTURBATIONS ; TENSOR ; SINGULARITY ; INVARIANCE ; SPECTRUM ; FLATNESS ; HORIZON
收录类别SCI
语种英语
资助者NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA04000000]
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21731
专题理论物理所SCI论文
通讯作者Cai, Y; Wang, YT; Piao, YS (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.; Piao, YS (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
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Cai, Y,Wang, YT,Piao, YS,et al. Is there an effect of a nontrivial c(T) during inflation?[J]. PHYSICAL REVIEW D,2016,93(6):63005.
APA Cai, Y,Wang, YT,Piao, YS,Piao, YS ,&Piao, YS .(2016).Is there an effect of a nontrivial c(T) during inflation?.PHYSICAL REVIEW D,93(6),63005.
MLA Cai, Y,et al."Is there an effect of a nontrivial c(T) during inflation?".PHYSICAL REVIEW D 93.6(2016):63005.
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