论文标题
基于Fisher信息的光力耦合强度的估计
Fisher-information-based estimation of optomechanical coupling strengths
论文作者
论文摘要
量子估计理论的形式主义（着重于量子和经典的Fisher信息）应用于光力学系统中耦合强度的估计。为了估算光学机械耦合，我们考虑了一种镜片的腔光模型，该模型具有镜子的非马克维亚布朗运动，并采用了输入输出形式形式，以获得空腔输出场。我们的估计场景基于腔输出场的平衡同源光反调。我们已经探索了相关测量依赖性的经典渔民信息与量子Fisher信息之间的差异，从而解决了是否可以通过平衡的同源检测来达到无偏置估计器的平均平方误差的下限的问题。我们发现，在同伴检测中，局部振荡器的相至关重要。某些正交测量值允许非常准确的估计。
The formalism of quantum estimation theory, focusing on the quantum and classical Fisher information, is applied to the estimation of the coupling strength in an optomechanical system. In order to estimate the optomechanical coupling, we have considered a cavity optomechanical model with non-Markovian Brownian motion of the mirror and employed input-output formalism to obtain the cavity output field. Our estimation scenario is based on balanced homodyne photodetection of the cavity output field. We have explored the difference between the associated measurement-dependent classical Fisher information and the quantum Fisher information, thus addressing the question of whether it is possible to reach the lower bound of the mean squared error of an unbiased estimator by means of balanced homodyne detection. We have found that the phase of the local oscillator in the homodyne detection is crucial; certain quadrature measurements allow very accurate estimation.
