论文标题
通过laguerre激发挤压状态的马赫 - 齐汉德干涉仪的相位估计
Phase estimation of Mach-Zehnder interferometer via Laguerre excitation squeezed state
论文作者
论文摘要
量子计量学在量子光学和量子信息处理领域中起重要作用。在这里，我们介绍了一种非高斯州，拉瓜式激发挤压状态，作为传统的马赫 - 泽纳德干涉仪的输入，以检查现实情况下的相位估计。我们考虑使用量子Fisher信息和奇偶校验检测来考虑内部和外部损失对相位估计的影响。结果表明，外部损失比内部损失更大。相位灵敏度和量子渔民信息可以通过增加光子数来改善，甚至超过了在一定的相位移位区域中通过两种模式挤压的真空超过理想相位灵敏度，以实现现实情况。
Quantum metrology has an important role in the fields of quantum optics and quantum information processing. Here we introduce a kind of non-Gaussian state, Laguerre excitation squeezed state as input of traditional Mach-Zehnder interferometer to examine phase estimation in realistic case. We consider the effects of both internal and external losses on phase estimation by using quantum Fisher information and parity detection. It is shown that the external loss presents a bigger effect than the internal one. The phase sensitivity and the quantum Fisher information can be improved by increasing the photon number and even surpass the ideal phase sensitivity by two-mode squeezed vacuum in a certain region of phase shift for realistic case.
