AI 中文总结
该研究提出一种不依赖输入态的动态压缩方法，通过交替沿正交分量向马赫-曾德尔干涉仪一臂施加压缩，可将其相位灵敏度提升至超海森堡标度，且对中等光子损耗具有鲁棒性。
AI 中文摘要
我们提出了一种可提升马赫-曾德尔干涉仪相位灵敏度的方法，该方法不依赖于其输入态，具体通过向干涉仪的一个臂施加压缩序列实现。通过交替沿正交 quadrature（正交分量）进行压缩，我们证明马赫-曾德尔干涉仪的相位灵敏度可得到通用提升。由于该提升与输入态无关，所提出的动态压缩方法结合非经典输入态时，可进一步提升相位灵敏度。我们将动态压缩方案与现有量子传感协议对比，表明其可实现超海森堡标度，且该方案对中等光子损耗具有鲁棒性。
英文摘要
We propose a method to enhance the phase sensitivity of a Mach-Zehnder interferometer, independent of its input states. This is achieved by applying squeezing sequences to one arm of the interferometer. By alternating between squeezing along orthogonal quadratures, we demonstrate that the phase sensitivity of a Mach-Zehnder interferometer can be generically enhanced. Since this enhancement is independent of the input states, the proposed dynamic squeezing method allows for further improvement in phase sensitivity when combined with non-classical input states. We compare the dynamic squeezing approach with existing quantum sensing protocols and show that super-Heisenberg scaling can be achieved. Finally, we demonstrate that the scheme is robust against moderate photon loss.
