论文标题
驱动驱动光力学中耦合强度的量子估计
Quantum estimation of coupling strengths in driven-dissipative optomechanics
论文作者
论文摘要
我们利用局部量子估计理论来研究驱动驱动性光学机械系统中线性和二次耦合强度的测量。对于模型参数的实验现实值，我们发现线性耦合强度比二次耦合强度更容易估计。我们的分析还表明，有关这些参数的大多数信息是在机械元素的降低状态中编码的，并且两个耦合参数的最佳估计策略都通过直接测量机械位置正交正交近似。有趣的是，我们还表明，温度并不总是对估计精度产生不利影响，并且在二次耦合参数的情况下，温度的影响更为明显。
We exploit local quantum estimation theory to investigate the measurement of linear and quadratic coupling strengths in a driven-dissipative optomechanical system. For experimentally realistic values of the model parameters, we find that the linear coupling strength is considerably easier to estimate than the quadratic one. Our analysis also reveals that the majority of information about these parameters is encoded in the reduced state of the mechanical element, and that the best estimation strategy for both coupling parameters is well approximated by a direct measurement of the mechanical position quadrature. Interestingly, we also show that temperature does not always have a detrimental effect on the estimation precision, and that the effects of temperature are more pronounced in the case of the quadratic coupling parameter.
