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| Gao, X; Gao, X (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 Zhong Guan Cun E Rd, Beijing 100080, Peoples R China. | |
| Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies? | |
| Source Publication | PHYSICS LETTERS B
 |
| Language | 英语 |
| Keyword | Chaotic Inflationary Universe Initial Conditions Anisotropy Perturbations |
| Abstract | We investigate the effects of the presence of relic classical superhorizon inhomogeneities during inflation. This superhorizon inhomogeneity appears as a gradient locally and picks out a preferred direction. Quantum fluctuations on this slightly inhomogeneous background are generally statistical anisotropic. We find a quadrupole modification to the ordinary isotropic spectrum. Moreover, this deviation from statistical isotropy is scale-dependent, with a similar to -1/k(2) factor. This result implies that the statistical anisotropy mainly appears on large scales, while the spectrum on small scales remains highly isotropic. Moreover, due to this -1/k(2) factor, the power on large scales is suppressed. Thus, our model can simultaneously explain the observed anisotropic alignments of the low-l multipoles and their low power. (C) 2011 Elsevier B.V All rights reserved. |
| 2011 | |
| ISSN | 0370-2693 |
| Volume | 702Issue:1Pages:12-15 |
| Subject Area | Physics |
| Indexed By | SCI |
| Funding Organization | NSFC ; NSFC ; NSFC ; NSFC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/14296 |
| Collection | 理论物理所科研产出_SCI论文 |
| Corresponding Author | Gao, X (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 Zhong Guan Cun E Rd, Beijing 100080, Peoples R China. |
| Recommended Citation GB/T 7714 | Gao, X,Gao, X . Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies?[J]. PHYSICS LETTERS B,2011,702(1):12-15. |
| APA | Gao, X,&Gao, X .(2011).Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies?.PHYSICS LETTERS B,702(1),12-15. |
| MLA | Gao, X,et al."Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies?".PHYSICS LETTERS B 702.1(2011):12-15. |
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| Can relic superhoriz（499KB） | 开放获取 | License | Application Full Text | |||
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