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Phase estimation via photon subtraction at the output of the hybrid interferometer
Qisi Zhou, Tao Jiang, Qingqian Kang +4
The hybrid interferometer integrating an optical parametric amplifier and a beam splitter has the potential to outperform the SU(1,1) interferometer. However, photon loss remains a…
Phase sensitivity of lossy Mach-Zehnder interferometer via photon addition operation
Qisi Zhou, Qingqian Kang, Teng Zhao +3
Photon addition operations applied to squeezed states have been shown to significantly enhance phase sensitivity. In this study, we extend this approach by applying photon addition…
Phase estimation via delocalized photon subtraction operation inside the SU(1,1) interferometer
Zhihao Li, Qingqian Kang, Teng Zhao +3
We propose a theoretical scheme to improve the precision of phase measurement using intensity detection by implementing delocalized photon subtraction operation (D-PSO) inside the…
Two-parameter estimation via photon subtraction operation within a feedback-assisted interferometer
Qingqian Kang, Zekun Zhao, Qisi Zhou +5
In this paper, we analyze how multi-photon subtraction operations in a feedback-assisted interferometer can enhance measurement precision for single-parameter and two-parameter est…
Improved linear and Kerr nonlinear phase estimation via photon addition operations
Zekun Zhao, Qingqian Kang, Shoukang Chang +4
The accuracy of quantum measurements can be effectively improved by using both photon-added non-Gaussian operations and Kerr nonlinear phase shifters. Here, we employ coherent stat…
Phase sensitivity via photon-subtraction operations inside Mach-Zehnder interferometer
Qisi Zhou, Qinqian Kang, Tao Jiang +4
Based on the conventional Mach-Zehnder interferometer, we propose a metrological scheme to improve phase sensitivity. In this scheme, we use a coherent state and a squeezed vacuum…