ITP OpenIR  > 理论物理所科研产出  > SCI论文
Liu, XW; Hu, B2; Zhang, Y3
Note on the initial conditions within the effective field theory approach of cosmic acceleration
发表期刊PHYSICAL REVIEW D
语种英语
关键词DATA RELEASE SUPERNOVAE GALAXIES
摘要By using the effective field theory approach, we investigate the role of initial conditions for the dark energy or modified gravity models. In detail, we consider the constant and linear parametrization of the effective Newton constant models. First, under the adiabatic assumption, the correction from the extra scalar degree of freedom in the beyond Lambda CDM model is found to be negligible. The dominant ingredient in this setup is the primordial curvature perturbation originated from the inflation mechanism, and the energy budget of the matter components is not very crucial. Second, the isocurvature perturbation sourced by the extra scalar field is studied. For the constant and linear models of the effective Newton constant, no such kind of scalar mode exists. For the quadratic model, there is a nontrivial one. However, the amplitude of the scalar field is damped away very fast on all scales. Consequently, it could not support a reasonable structure formation. Finally, we study the importance of the setup of the scalar field starting time. By setting different turn-on times, namely, a = 10(-2) and a = 10(-7), we compare the cosmic microwave background radiation temperature, lensing deflection angle autocorrelation function, and the matter power spectrum in the constant and linear models. We find there is an order of O(1%) thorn difference in the observable spectra for constant model, while for the linear model, it is smaller than O(0.1%).
2017
ISSN2470-0010
卷号96期号:12页码:123537
学科领域Astronomy & Astrophysics ; Physics
学科门类Astronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.96.123537
收录类别SCIE
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22992
专题理论物理所科研产出_SCI论文
作者单位1.Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
4.Chongqing Univ Posts & Telecommun, Coll Sci, Chongqing 400065, Peoples R China
推荐引用方式
GB/T 7714
Liu, XW,Hu, B,Zhang, Y. Note on the initial conditions within the effective field theory approach of cosmic acceleration[J]. PHYSICAL REVIEW D,2017,96(12):123537.
APA Liu, XW,Hu, B,&Zhang, Y.(2017).Note on the initial conditions within the effective field theory approach of cosmic acceleration.PHYSICAL REVIEW D,96(12),123537.
MLA Liu, XW,et al."Note on the initial conditions within the effective field theory approach of cosmic acceleration".PHYSICAL REVIEW D 96.12(2017):123537.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Liu, XW]的文章
[Hu, B]的文章
[Zhang, Y]的文章
百度学术
百度学术中相似的文章
[Liu, XW]的文章
[Hu, B]的文章
[Zhang, Y]的文章
必应学术
必应学术中相似的文章
[Liu, XW]的文章
[Hu, B]的文章
[Zhang, Y]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。