ITP OpenIR  > 理论物理所SCI论文
On cross-correlations between curvature and isocurvature perturbations during inflation
Gao, Xian; Gao, X , Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
2010
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
期号2页码:-
摘要We investigate the effects of couplings between curvature and isocurvature perturbations before and around horizon-crossings during cosmological inflation. We consider a generalized two-field inflation model, in which the non-canonical kinetic term allows us arbitrary sound speeds of curvature and isocurvature perturbations. By using the field-theoretical perturbative analysis, we calculate the cross-spectrum between curvature and isocurvature perturbations and the corrections to curvature and isocurvature power spectra due to the presence of couplings between them. Our analysis confirms previous results that the cross-correlations are generated and amplified when perturbations cross the horizons. Moreover, we find the cross-correlation, which was previously shown to be first-order in slow-roll parameter, can be enhanced when the sound speed of curvature perturbation is much larger than that of the isocurvature perturbation. This is because in this case the isocurvature perturbation exits its horizon much earlier than the curvature perturbation and acts as a nearly constant source on the curvature perturbation.
部门归属Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
关键词Density Perturbations Spectra
学科领域Physics
资助者NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401]
URL查看原文
收录类别SCI
资助者NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401] ; NSFC[10535060/A050207, 10821504]; Ministry of Science and Technology 973[2007CB815401]
WOS记录号WOS:000276102300016
引用统计
被引频次:15[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/311006/5171
专题理论物理所SCI论文
通讯作者Gao, X , Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714
Gao, Xian,Gao, X , Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China. On cross-correlations between curvature and isocurvature perturbations during inflation[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(2):-.
APA Gao, Xian,&Gao, X , Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China.(2010).On cross-correlations between curvature and isocurvature perturbations during inflation.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2),-.
MLA Gao, Xian,et al."On cross-correlations between curvature and isocurvature perturbations during inflation".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .2(2010):-.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
On cross-correlation(341KB) 开放获取使用许可请求全文
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
[Gao, Xian]的文章
[Gao, X , Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China]的文章
百度学术
百度学术中相似的文章
[Gao, Xian]的文章
[Gao, X , Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China]的文章
必应学术
必应学术中相似的文章
[Gao, Xian]的文章
[Gao, X , Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China]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。