激光技术2025，Vol.49Issue(2)：159-165,7.DOI:10.7510/jgjs.issn.1001-3806.2025.02.001
干涉仪量子增强相位精密测量的光子损耗鲁棒性
Photon loss robustness of optical interferometer for quantum-enhanced phase precision measurements
摘要
Abstract
In order to improve the phase measurement sensitivity of photonic optical interferometers in photon loss scenarios,a theoretical study of the sensitivity of photon coincidence measurement under photon loss has been carried out using a typical twin-Fock state as an input of a photonic Mach-Zehnder interferometer.Compared to parity measurement,the analysis shows that the photon coincidence measurement scheme is more robust to photon loss when using photon pairs as input,and the phase measurement sensitivity based on photon coincidence measurement can be very close to the quantum Cramér-Rao bound when the phase is between π/4 and π/2.The results show that the use of the photon coincidence measurement scheme can help to achieve ultra-high precision phase measurements in real-world environments,thus offering the possibility of breaking through the traditional scattering noise limit.关键词
量子光学/量子精密测量/马赫-曾德尔干涉仪/量子克拉美罗界/光子符合计数探测Key words
quantum optics/quantum precision measurement/Mach-Zehnder interferometer/quantum Cramér-Rao bound/coincidence measurement分类
物理学引用本文复制引用
李俊宏,冯夏宁,韦联福..干涉仪量子增强相位精密测量的光子损耗鲁棒性[J].激光技术,2025,49(2):159-165,7.基金项目
国家重点研发计划资助项目(2021YFA0718803) （2021YFA0718803）
国家自然科学基金资助项目(11974290) （11974290）
