论文标题
后中子星星的重力波检测器：超出米歇尔森·法布里·佩罗干涉仪的量子损失极限
A Gravitational Wave Detector for Post Merger Neutron Stars: Beyond the Quantum Loss Limit of Michelson Fabry Perot Interferometer
论文作者
论文摘要
迈克尔逊干涉仪与光腔作为手臂的共鸣。随着光速以有限的速度行驶，这些空腔是以低于带宽频率的频率增强信号的最佳选择。但是，少量的光损失将显着影响没有最佳放大的高频信号。我们发现具有“ L谐振器”作为核心的优雅干涉仪配置，在高频下，双重回收的Fabry Perot米歇尔森干涉仪的损失有限的损失有限。遵循此概念，我们提供了25 km检测器的宽带设计，在2-4 kHz之间具有出色的灵敏度。鉴于GWTC-3目录和几个代表性的状态中子星方程，我们已经对二进制中子星星合并进行了二进制中子星的蒙特卡洛人群研究。我们发现，新的干涉仪配置在合并后信号的信噪比中显着优于其他第三代探测器。假设具有信噪比> 5的检测阈值，并且对于我们已经探索的情况，新设计是唯一一个自信地达到每年大于一年的检测率的检测器，每年的率为1至30个事件。
Advanced gravitational-wave detectors that have made groundbreaking discoveries are Michelson interferometers with resonating optical cavities as their arms. As light travels at finite speed, these cavities are optimal for enhancing signals at frequencies below their bandwidth frequency. A small amount of optical loss will, however, significantly impact the high-frequency signals which are not optimally amplified. We find an elegant interferometer configuration with an "L-resonator" as the core, significantly surpassing the loss limited sensitivity of dual recycled Fabry Perot Michelson interferometers at high frequencies. Following this concept, we provide a broadband design of a 25 km detector with outstanding sensitivity between 2-4 kHz. We have performed Monte-Carlo population studies of binary neutron star mergers, given the most recent merger rate from the GWTC-3 catalog and several representative neutron star equations of state. We find that the new interferometer configuration significantly outperforms other third-generation detectors by a factor of 3 to 7 in the signal-to-noise ratio of the post-merger signal. Assuming a detection threshold with signal-to-noise ratio >5 and for the cases we have explored, the new design is the only detector that confidently achieves a detection rate larger than one per year, with the rate being 1 to 30 events per year.
