论文标题
使用$ e $ -mode极化对宇宙双折射的限制
Constraints on cosmic birefringence using $E$-mode polarisation
论文作者
论文摘要
双重宇宙可以通过宇宙微波背景光子极化平面的旋转来表现出来。通常使用偏振$ b $模式对此进行研究，该模式随着极化器的方向的误解而退化。在这里，我们指出了一种仅使用温度和$ e $ mmode信号提取双折射角的独立方法。我们预测，通过理想的宇宙变化实验，我们可以用$ 3^\ Circ $以$ 3 \，σ$统计显着性来限制$ 0.3^\ circ $的双重角度，它接近使用$ b $模式的当前约束。我们探讨了该方法如何受到极化效率引入的系统误差的影响。将来，这可能会提供另一种方法来检查任何声称的$ b $ mode派生的双折射签名。
A birefringent universe could show itself through a rotation of the plane of polarisation of the cosmic microwave background photons. This is usually investigated using polarisation $B$ modes, which is degenerate with miscalibration of the orientation of the polarimeters. Here we point out an independent method for extracting the birefringence angle using only temperature and $E$-mode signals. We forecast that, with an ideal cosmic-variance-limited experiment, we could constrain a birefringence angle of $0.3^\circ$ with $3\,σ$ statistical significance, which is close to the current constraints using $B$ modes. We explore how this method is affected by the systematic errors introduced by the polarisation efficiency. In the future, this could provide an additional way of checking any claimed $B$-mode derived birefringence signature.
