论文标题
通过完成正方形，用于开发用于decigo的光弹力量子锁定的第一步实验：对模拟量子噪声的敏感性优化
First-step experiment in developing optical-spring quantum locking for DECIGO: sensitivity optimization for simulated quantum noise by completing the square
论文作者
论文摘要
DECI-HERTZ干涉仪重力波动台（Decigo）是太空传播激光干涉仪的未来任务。 Decigo具有1,000公里长的臂腔，主要是在0.1 Hz左右的较低频率下检测原始引力波（PGW）。电磁频谱中的观察结果降低了PGW能量密度上限的边界（$ω_ {\ rm GW} \ sim 10^{ - 15} \至10^{ - 16} $）。结果，Decigo的目标灵敏度主要受量子噪声的限制，需要进一步改进。为了最大化检测的可行性，而在Decigo的较大衍射损失受到限制的同时，理论上提出了一种具有光弹簧的量子锁定技术，以提高PGW的信噪比。在本文中，我们通过完成多个检测器输出的平方来实验验证光学弹簧量子锁定的一个关键要素：灵敏度优化。该实验是在简化的桌面光学设置上运行的，并具有经典的噪声模拟量子噪声。我们通过方形完成方法成功获得了两种不同的激光能力，以获得最佳的敏感性。
DECi-hertz Interferometer Gravitational Wave Observatory (DECIGO) is a future mission for a space-borne laser interferometer. DECIGO has 1,000-km-long arm cavities mainly to detect the primordial gravitational waves (PGW) at lower frequencies around 0.1 Hz. Observations in the electromagnetic spectrum have lowered the bounds on the upper limit of PGW energy density ($Ω_{\rm gw} \sim 10^{-15} \to 10^{-16}$). As a result, DECIGO's target sensitivity, which is mainly limited by quantum noise, needs further improvement. To maximize the feasibility of detection while constrained by DECIGO's large diffraction loss, a quantum locking technique with an optical spring was theoretically proposed to improve the signal-to-noise ratio of the PGW. In this paper, we experimentally verify one key element of the optical-spring quantum locking: sensitivity optimization by completing the square of multiple detector outputs. This experiment is operated on a simplified tabletop optical setup with classical noise simulating quantum noise. We succeed in getting the best of the sensitivities with two different laser powers by the square completion method.
