Conceptual design and science cases of a juggled interferometer for gravitational wave detection
Conceptual design and science cases of a juggled interferometer for gravitational wave detection
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DOI：
10.1103/physrevd.106.042007
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发表时间：
2022-07
影响因子：
5
通讯作者：
Bin Wu;Tomohiro Ishikawa;S. Iwaguchi;Ryuma Shimizu;Izumi Watanabe;Yuki Kawasaki;Y. Michimura
中科院分区：
文献类型：
--
作者：
Bin Wu;Tomohiro Ishikawa;S. Iwaguchi;Ryuma Shimizu;Izumi Watanabe;Yuki Kawasaki;Y. Michimura
Juggled Interferometer（JIFO）是一种基于地球的引力波探测器，使用反复自由下落的测试质量。由于不用担心地震噪声和悬浮热噪声，JIFO在较低频率下的灵敏度比目前的地球引力波探测器要高得多。如果采用边缘锁定方法，JIFO的数据读出方法可能具有挑战性。本文提出了一种通过构造具有与条纹无关的信噪比的复变函数来实现相位重构的方法。考虑到爱因斯坦望远镜（ET）的位移噪声预算，我们表明，在0.1- 2.5Hz，即使不连续的数据，篡改的测试质量显着提高灵敏度。提高灵敏度带来的科学案例将包括探测10^4 - 10^5\，M_{\odot}$黑洞的准正常模式，用黑洞和中子星的吸气检验Brans Dicke理论，以及探测与原始黑洞相关的引力波。
The Juggled interferometer (JIFO) is an earth-based gravitational wave detector using repeatedly free-falling test masses. With no worries of seismic noise and suspension thermal noise, the JIFO can have much better sensitivity at lower frequencies than the current earth-based gravitational wave detectors. The data readout method of a JIFO could be challenging if one adopts the fringe-locking method. We present a phase reconstruction method in this paper by building up a complex function which has a fringe-independent signal-to-noise ratio. Considering the displacement noise budget of the Einstein Telescope (ET), we show that the juggled test masses significantly improve the sensitivity at 0.1-2.5$\,$Hz even with discontinuous data. The science cases brought with the improved sensitivity would include detecting quasi-normal modes of black holes with $10^4-10^5\,M_{\odot}$, testing Brans-Dicke theory with black-hole and neutron-star inspirals, and detecting primordial-black-hole-related gravitational waves.