论文标题
基于奇偶校验检测的马赫 - 齐汉德干涉法与连贯和非高斯挤压真空状态作为输入
Parity-detection-based Mach-Zehnder interferometry with coherent and non-Gaussian squeezed vacuum states as inputs
论文作者
论文摘要
从理论上讲，我们使用基于平价检索的Mach-Zhhnder干涉仪在阶段估算中探索非高斯操作所产生的优点，其中一个输入是连贯的状态，而另一种是非高斯挤压真空状态（SVS）。我们考虑了一个现实的模型，以执行三种不同的非高斯操作，即单模SVS上的光子减法，光子添加和光子催化。我们首先得出非高斯SVSS的Wigner函数，然后将其用于得出相位灵敏度的表达式。对相灵敏度的分析表明，在合适的参数选择下，所有三种不同的非高斯操作都可以增强相位灵敏度。我们还考虑了这些非高斯操作的概率性质，其结果揭示了单个光子添加是最佳操作。此外，我们的分析还使我们能够确定SVS的最佳挤压以及涉及非高斯操作实施的光束分离器的透射率。
We theoretically explore the advantages rendered by non-Gaussian operations in phase estimation using a parity-detection-based Mach-Zehnder interferometer, with one input being a coherent state and the other being a non-Gaussian squeezed vacuum state (SVS). We consider a realistic model to perform three different non-Gaussian operations, namely photon subtraction, photon addition, and photon catalysis on a single-mode SVS. We start by deriving the Wigner function of the non-Gaussian SVSs, which is then utilized to derive the expression for the phase sensitivity. The analysis of the phase sensitivity reveals that all three different non-Gaussian operations can enhance the phase sensitivity under suitable choices of parameters. We also consider the probabilistic nature of these non-Gaussian operations, the results of which reveal the single photon addition to be the optimal operation. Further, our analysis also enables us to identify the optimal squeezing of the SVS and the transmissivity of the beam splitter involved in the implementation of the non-Gaussian operations.
