论文标题
使用Lisa和Taiji搜索随机重力波背景的异常极化模式
Searching anomalous polarization modes of stochastic gravitational wave background with LISA and Taiji
论文作者
论文摘要
重力波的载体和标量极化模式不存在一般相对论，它们的检测将对基本物理产生重大影响。在本文中，我们探讨了通过Lisa-Taiji网络在1 MHz附近的重力波背景中这些异常极化模式的可检测性。网络的固有几何对称性在很大程度上简化了相关分析。通过采用相关输出的合适线性组合，可以通过代数取消标准张量模式的贡献，并且可以专门检查异常模式。我们通过这种取消方法为异常模式的信噪比提供简洁的表达式。我们还讨论了使用相关重叠型功能的整体频率依赖性分别估算矢量和标量模式幅度的可能性。
The vector and scalar polarization modes of gravitational waves do not exist in General Relativity, and their detection would have significant impacts on fundamental physics. In this paper, we explored the detectability of these anomalous polarization modes in a gravitational wave background around 1 mHz with the future LISA-Taiji network. The inherent geometrical symmetry of the network largely simplifies the correlation analysis. By taking a suitable linear combination of the correlated outputs, the contribution of the standard tensor modes can be canceled algebraically, and the anomalous modes can be exclusively examined. We provide concise expressions for the signal-to-noise ratios of the anomalous modes with this cancellation method. We also discuss the possibility of separately estimating the amplitudes of the vector and scalar modes, using the overall frequency dependence of the associated overlap reduction functions.
