论文标题
量子精度无噪声干涉仪的量子精度限制
Quantum precision limits of displacement noise free interferometers
论文作者
论文摘要
由于各种来源贡献的光学元件的位移噪声，当前的激光触时引力检测器对其精度具有基本限制。已经提出了几种用于移位无液的干涉仪（DFI）的方案，以减轻其效果。这些方案背后的想法类似于量子传感中的无腐蚀子空间，即某些模式包含有关重力波的信息，但对镜像运动不敏感（位移噪声）。在本文中，我们得出了一般DFI方案的量子精度限制，包括最佳测量基础和最佳挤压方案。我们引入了三角形腔DFI方案，并将我们的一般界限应用于它。使用不同的噪声模型对该方案进行精确分析表明，DFI属性会导致有趣的灵敏度概况，并由于降低噪声而提高了精度，并从挤压中获得了更大的增益。
Current laser-interferometric gravitational wave detectors suffer from a fundamental limit to their precision due to the displacement noise of optical elements contributed by various sources. Several schemes for Displacement-Noise Free Interferometers (DFI) have been proposed to mitigate their effects. The idea behind these schemes is similar to decoherence-free subspaces in quantum sensing i.e. certain modes contain information about the gravitational waves but are insensitive to the mirror motion (displacement noise). In this paper, we derive quantum precision limits for general DFI schemes, including optimal measurement basis and optimal squeezing schemes. We introduce a triangular cavity DFI scheme and apply our general bounds to it. Precision analysis of this scheme with different noise models shows that the DFI property leads to interesting sensitivity profiles and improved precision due to noise mitigation and larger gain from squeezing.
