论文标题
由于镜面粗糙度，精确计量学的散射损失
Scattering Loss in Precision Metrology due to Mirror Roughness
论文作者
论文摘要
光损耗降低激光干涉仪器的灵敏度。它们减少了信号光子的数量，并引入了与扩散光相关的技术噪声。在量子增强的计量学中，它们打破了相关光子之间的纠缠。这种变形是实现精度计量学高度降低量子降噪的主要障碍之一。在这项工作中，我们比较了加利福尼亚州40m重力波检测器原型干涉仪中对腔和镜像损失的直接测量，并使用镜面表面轮廓图获得了从半分析的腔内波前模拟获得的数值估计。我们展示了一种统一的方法，用于估计光腔（例如Ligo重力探测器）的总损失，该方法将导致具有最小的量子量化精度计量学计量的系统的工程。
Optical losses degrade the sensitivity of laser interferometric instruments. They reduce the number of signal photons and introduce technical noise associated with diffuse light. In quantum-enhanced metrology, they break the entanglement between correlated photons. Such decoherence is one of the primary obstacles in achieving high levels of quantum noise reduction in precision metrology. In this work, we compare direct measurements of cavity and mirror losses in the Caltech 40m gravitational-wave detector prototype interferometer with numerical estimates obtained from semi-analytic intra-cavity wavefront simulations using mirror surface profile maps. We show a unified approach to estimating the total loss in optical cavities (such as the LIGO gravitational detectors) that will lead towards the engineering of systems with minimum decoherence for quantum-enhanced precision metrology.
