论文标题
通过Lisa-Taiji网络在随机重力波背景中测量均衡违规
Measuring Parity Violation in the Stochastic Gravitational Wave Background with the LISA-Taiji network
论文作者
论文摘要
违反平价是一种有力的观察，可以将重力波（GWS）与天体物理学的宇宙学背景区分开。平面单GW干涉仪，无论是在地面还是空间上，都无法测量各向同性随机引力波背景（SGWB）的净圆极化。在本文中，我们探讨了通过互相关的两个计划在2034年左右推出的两个空间探测器来检测各向同性SGWB的循环极化的可能性：Lisa和Taiji。我们计算了这种网络对手性的响应，并对SGWB的$ i $和$ v $ Stokes参数进行了Fisher预测分析。我们发现，对于用$ H^2 \，ω_ {\ rm GW} \ Simeq 10^{ - 12} $，可以要求对手性的明确测量。
Parity violation is a powerful observable to distinguish a cosmological background of Gravitational Waves (GWs) from an astrophysical one. Planar single GW interferometers, both on ground and in space, are unable to measure the net circular polarization of an isotropic Stochastic Gravitational Wave Background (SGWB). In this paper, we explore the possibility of detecting circular polarization of an isotropic SGWB by cross-correlating two space-based detectors planned to be launched around 2034: LISA and Taiji. We compute the response of such a network to chirality and we perform a Fisher forecast analysis on the $I$ and $V$ Stokes parameters for the SGWB. We find that a clear measurement of chirality can be claimed for a maximally chiral signal with $h^2 \, Ω_{\rm GW} \simeq 10^{-12}$.
