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quant-ph2025
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…
quant-ph2025
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…
quant-ph2025
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…