| 题名: | Cosmic birefringence fluctuations and cosmic microwave background B-mode polarization |
| 作者: | Liu, Guo-Chin |
| 日期: | 2015-05-18 |
| 上传时间: | 2016-01-06 11:03:45 (UTC+8) |
| 出版者: | Elsevier BV * North-Holland |
| 摘要: | Recently, BICEP2 measurements of the cosmic microwave background (CMB) B-mode polarization has indicated the presence of primordial gravitational waves at degree angular scales, inferring the tensor-to-scalar ratio of r=0.2 and a running scalar spectral index. In this {\em Letter}, we show that the existence of the fluctuations of cosmological birefringence can give rise to CMB B-mode polarization that fits BICEP2 data with r<0.11 and no running of the scalar spectral index. Thus, it might be too hasty to conclude that many inflation models with small r are ruled out based on BICEP2 result. |
| 關聯: | Physics Letters B 746, p.406-409 |
| DOI: | 10.1016/j.physletb.2015.05.038 |
| 显示于类别: | [物理學系暨研究所] 期刊論文
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