标题： Lisa、Taiji及其网络探测宇宙弦产生的随机引力波背景的能力 显示英文标题

标题： The ability of Lisa, Taiji, and their networks to detect the stochastic gravitational wave background generated by Cosmic Strings

摘要： 宇宙弦有助于我们理解和揭示宇宙的基本结构和演化模式，统一我们对宇宙的知识，并揭示新的物理定律和现象。 因此，我们期望在空间探测器中检测到由宇宙弦产生的随机引力波背景（SGWB）信号。 我们分析了单独的空间探测器LISA和天琴，以及联合的空间探测器网络LISA-Taiji对由宇宙弦产生的SGWB信号的探测能力，同时考虑了其他天文噪声源。 结果表明，LISA-Taiji网络在探测由宇宙弦产生的SGWB信号方面表现出更强的能力，并能够提供有力的证据。 LISA-Taiji网络可以对宇宙弦张力$G\mu\sim4\times10^{-17}$进行不确定性估计$\Delta G\mu/G\mu<0.5$，并在$G\mu\sim10^{-17}$处提供宇宙弦产生SGWB信号存在的证据，在$G\mu\sim10^{-16}$处提供强证据。 即使仅存在SGWB信号，它也可以对宇宙弦张力$G\mu<10^{-18}$实现相对不确定性$\Delta G\mu/G\mu<0.5$，并在$G\mu\sim10^{-17}$处提供强证据。 显示英文摘要

摘要： The cosmic string contributes to our understanding and revelation of the fundamental structure and evolutionary patterns of the universe, unifying our knowledge of the cosmos and unveiling new physical laws and phenomena. Therefore, we anticipate the detection of Stochastic Gravitational Wave Background (SGWB) signals generated by cosmic strings in space-based detectors. We have analyzed the detection capabilities of individual space-based detectors, Lisa and Taiji, as well as the joint space-based detector network, Lisa-Taiji, for SGWB signals produced by cosmic strings, taking into account other astronomical noise sources. The results indicate that the Lisa-Taiji network exhibits superior capabilities in detecting SGWB signals generated by cosmic strings and can provide strong evidence. The Lisa-Taiji network can achieve an uncertainty estimation of $\Delta G\mu/G\mu<0.5$ for cosmic string tension $G\mu\sim4\times10^{-17}$, and can provide evidence for the presence of SGWB signals generated by cosmic strings at $G\mu\sim10^{-17}$, and strong evidence at $G\mu\sim10^{-16}$. Even in the presence of only SGWB signals, it can achieve a relative uncertainty of $\Delta G\mu/G\mu<0.5$ for cosmic string tension $G\mu<10^{-18}$, and provide strong evidence at $G\mu\sim10^{-17}$.