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arXiv 1907.07486gr-qc
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引力波的引力透镜:偏振面的旋转

Gravitational Lensing of Gravitational Waves: Rotation of Polarization Plane

Shaoqi Hou, Xi-Long Fan, Zong-Hong Zhu

摘要:

与光类似,如果在多条路径上行进的引力波在行进途中有一个引力透镜,那么它们可能到达同一个位置。引力透镜除了使引力波的振幅放大和光线之间的时间延迟外,还使光线的偏振面旋转。这导致了天线方向图函数的变化,该函数描述了探测器对其相对于引力波的取向的响应。这些效应都反映在应变中,即干涉仪记录的信号中。各个方向的引力波射线激发出不同的应变。由于放大倍数、相位和偏振面旋转的不同,它们的应变也不同。相位差主要来源于时间延迟。此外,当这些应变相互比较时,偏振平面的旋转似乎引入了\textit{apparent}矢量偏振。由于偏转角很小,旋转的影响可以忽略不计。

英文摘要:

Similar to the light, gravitational waves traveling in multiple paths may arrive at the same location if there is a gravitational lens on their way. Apart from the magnification of the amplitudes and the time delay between the gravitational wave rays, gravitational lensing also rotates their polarization planes. This results in the changes in the antenna pattern function, which describes the response of the detector to its relative orientation to the gravitational wave. These effects are all reflected in the strain, the signal registered by the interferometers. The gravitational wave rays in various directions stimulate different strains. Their strains differ from each other due to different magnification factors, the phases and the rotation of the polarization plane. The phase difference mainly comes from the time delay. Moreover, the rotation of the polarization plane seemingly introduces the \textit{apparent} vector polarizations, when these strains are compared with each other. Because of the smallness of the deflection angles, the effect of the rotation is negligible.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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