论文标题
宇宙反弹中CMB中的异常
Anomalies in the CMB from a cosmic bounce
论文作者
论文摘要
我们探索了早期宇宙的模型，在该模型中，通货膨胀时期之前是宇宙反弹，并认为这种情况为在宇宙微波背景（CMB）中大的角度尺度上观察到的几个异常特征提供了共同的起源。更具体地说，我们表明，从这种情况下，预期的是，抑制功率抑制，偶极不对称和偏爱奇数相关性，并与观测值相吻合，并具有振幅和比例依赖性。该模型还减轻了镜头幅度的张力。这些信号源于间接效应，即CMB模式与超马力波长之间的非高斯相关性在功率谱中诱导。我们不限于任何特定理论，而是获得家庭弹跳模型共有的特征。
We explore a model of the early universe in which the inflationary epoch is preceded by a cosmic bounce, and argue that this scenario provides a common origin to several of the anomalous features that have been observed at large angular scales in the cosmic microwave background (CMB). More concretely, we show that a power suppression, a dipolar asymmetry, and a preference for odd-parity correlations, with amplitude and scale dependence in consonance with observations, are expected from this scenario. The model also alleviates the tension in the lensing amplitude. These signals originate from the indirect effect that non-Gaussian correlations between CMB modes and super-horizon wavelengths induce in the power spectrum. We do not restrict to any specific theory, but rather derive features common to a family bouncing models.
