Boosting the sensitivity of high-frequency gravitational wave detectors using PT -symmetry
Boosting the sensitivity of high-frequency gravitational wave detectors using PT -symmetry
复制标题
利用 PT 对称性提高高频引力波探测器的灵敏度
DOI：
10.1103/physrevd.106.082002
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发表时间：
2022
影响因子：
5
通讯作者：
Ma, Yiqiu
中科院分区：
文献类型：
--
作者：
Wang, Chuming;Zhao, Chunnong;Li, Xiang;Zhou, Enping;Miao, Haixing;Chen, Yanbei;Ma, Yiqiu
中子星合并残余物辐射的千赫兹引力波携带着有关高密度核物质态物理以及许多重要天体物理现象（例如伽马射线爆发和黑洞形成）的丰富信息。目前的激光干涉仪引力波探测器，如LIGO、VIRGO和KAGRA，在千赫兹频段的信号响应有限，因此无法捕获这些重要的物理现象。这项工作提出了一种替代协议，通过实施光机械量子放大器来提高高频引力波探测器的灵敏度。通过辅助量子放大器，该设计具有奇偶时间（）对称性，使得检测频带在千赫兹范围内显着展宽。在这项工作中，我们仔细分析了该设计的量子噪声限制灵敏度和动态稳定性。根据我们的协议，我们的结果表明，量子噪声限制灵敏度将在 3 kHz 左右提高一个数量级，这表明我们的设计在未来搜索中子星合并信号方面具有潜力。
The kilo-Hertz gravitational waves radiated by the neutron star merger remnants carry rich information about the physics of high-density nuclear matter states, and many important astrophysical phenomena such as gamma-ray bursts and black hole formation. Current laser interferometer gravitational wave detectors, such as LIGO, VIRGO, and KAGRA have limited signal response at the kilo-Hertz band, thereby being unable to capture these important physical phenomena. This work proposes an alternative protocol for boosting the sensitivity of the gravitational wave detectors at high frequency by implementing an optomechanical quantum amplifier. With the auxiliary quantum amplifier, this design has the feature of parity-time () symmetry so that the detection band will be significantly broadened within the kilo-Hertz range. In this work, we carefully analyze the quantum-noise-limited sensitivity and the dynamical stability of this design. Based on our protocol, our result shows that the quantum-noise-limited sensitivity will be improved by one order of magnitude around 3 kHz, which indicates the potential of our design for a future search of neutron star merger signals.