论文标题
不平衡的MACH-ZEHNDER干涉仪的最佳相位灵敏度
Optimal phase sensitivity of an unbalanced Mach-Zehnder interferometer
论文作者
论文摘要
在本文中，我们解决了针对给定的纯输入状态并考虑特定检测方案的优化不平衡的Mach-Zehnder干涉仪的问题。虽然仅通过量子渔民信息[phys [phys）可以唯一确定第一束分离器的最佳传输系数。 Rev. A 105，012604（2022）]，第二束分离器传输系数也是检测依赖性的。我们系统地提供了三种广泛使用的检测方案的第二梁分离器最佳传输系数的分析解决方案。我们提供详细的示例，包括高斯和非高斯输入状态，表明何时不平衡的马赫·泽尔德干涉仪可以在相位敏感性方面胜过其平衡的对应。
In this paper we address the problem of optimizing an unbalanced Mach-Zehnder interferometer, for a given pure input state and considering a specific detection scheme. While the optimum transmission coefficient of the first beam splitter can be uniquely determined via the quantum Fisher information only [Phys. Rev. A 105, 012604 (2022)], the second beam splitter transmission coefficient is detection-scheme dependent, too. We systematically give analytic solutions for the optimum transmission coefficient of the second beam splitter for three types of widely used detection schemes. We provide detailed examples including both Gaussian and non-Gaussian input states, showing when an unbalanced Mach-Zehnder interferometer can outperform its balanced counterpart in terms of phase sensitivity.
