论文标题
通过广义Cramér-rao界限诊断量子传感器中的瑕疵
Diagnosing Imperfections in Quantum Sensors via Generalized Cramér-Rao Bounds
论文作者
论文摘要
量子计量学从仔细利用量子资源进行测量的能力中获得了功能。但是，该优势依赖于根据估计参数的差异进行评估的精制数据后处理。当采用贝叶斯技术时，更多的要素可用于评估估计的质量。在这里，我们采用了广义的经典cramér-rao界限，以详细研究用量子光执行的相位估计实验。特别是，我们表明，与标准方法相比，三阶绝对力矩可以具有较高的估计偏差能力。我们的研究表明，鉴定了一种替代策略，该策略在监视高精度传感器的正确操作方面具有可能的优势。
Quantum metrology derives its capabilities from the careful employ of quantum resources for carrying out measurements. This advantage, however, relies on refined data postprocessing, assessed based on the variance of the estimated parameter. When Bayesian techniques are adopted, more elements become available for assessing the quality of the estimation. Here we adopt generalized classical Cramér-Rao bounds for looking in detail into a phase-estimation experiment performed with quantum light. In particular, we show that the third-order absolute moment can give a superior capability in revealing biases in the estimation, compared to standard approaches. Our studies point to the identification of an alternative strategy that brings a possible advantage in monitoring the correct operation of high-precision sensors.
