论文标题
通过经典相关的探针和测量值对位置和动量的共轭变化进行最佳估计
Optimal estimation of conjugate shifts in position and momentum by classically correlated probes and measurements
论文作者
论文摘要
由于位置和动量的同时和非平凡的小变化，多参数估计对于力传感是必要的。因此，设计允许同时估计所有参数的量子探针是一项重要任务。估计量子谐波振荡器位置和动量变化的最佳方法在纠缠或量子非高斯州采用探针。我们表明，通过采用与位置或动量测量相关的独立挤压高斯州的独立集，可以以更可行的方式获得相同的结果。该结果表明，探针状态和直接用于强制感应的测量值之间经典相关性的尚未开发的能力
Multi-parameter estimation is necessary for force sensing due to simultaneous and nontrivial small changes of position and momentum. Designing quantum probes that allow simultaneous estimation of all parameters is therefore an important task. The optimal methods for estimation of the conjugate changes of position and momentum of quantum harmonic oscillator employ probes in entangled or quantum non-Gaussian states. We show that the same results can be obtained in a significantly more feasible fashion by employing independent sets of differently squeezed Gaussian states classically correlated to position or momentum measurements. This result demonstrates an unexplored power of a classical correlation between the probe states and measurements directly applicable to force sensing
