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    题名: Cosmic birefringence fluctuations and cosmic microwave background B-mode polarization
    作者: Lee, Seokcheon;Liu, Guo-Chin;Ng, Kin-Wang
    日期: 2015-06-30
    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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