利用普朗克尺度物理学缓解宇宙微波背景辐射中的张力
Alleviating the Tension in the Cosmic Microwave Background Using Planck-Scale Physics.
作者信息
Ashtekar Abhay, Gupt Brajesh, Jeong Donghui, Sreenath V
机构信息
Institute for Gravitation and the Cosmos & Physics Department, Penn State University, University Park, Pennsylvania 16801, USA.
Institute for Gravitation and the Cosmos & Department of Astronomy and Astrophysics, Penn State University, University Park, Pennsylvania 16801, USA.
出版信息
Phys Rev Lett. 2020 Jul 31;125(5):051302. doi: 10.1103/PhysRevLett.125.051302.
Certain anomalies in the CMB bring out a tension between the six-parameter flat ΛCDM model and the CMB data. We revisit the PLANCK analysis with loop quantum cosmology (LQC) predictions and show that LQC alleviates both the large-scale power anomaly and the tension in the lensing amplitude. These differences arise because, in LQC, the primordial power spectrum is scale dependent for small k, with a specific power suppression. We conclude with a prediction of larger optical depth and power suppression in the B-mode polarization power spectrum on large scales.
宇宙微波背景（CMB）中的某些异常现象揭示了六参数平坦Λ冷暗物质（ΛCDM）模型与CMB数据之间的矛盾。我们利用圈量子宇宙学（LQC）的预测结果重新审视了普朗克卫星的分析数据，结果表明LQC能够缓解大尺度功率异常以及透镜振幅方面的矛盾。这些差异的出现是因为，在LQC中，原初功率谱对于小尺度波数k是尺度依赖的，并且存在特定的功率抑制。我们最后预测，在大尺度上，B模式偏振功率谱将有更大的光学深度和功率抑制。
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