Single-photon-added coherent state based postselected weak measurement

• URL: http://arxiv.org/abs/2503.12865v1
• Date: Mon, 17 Mar 2025 06:50:50 GMT
• Title: Single-photon-added coherent state based postselected weak measurement
• Authors: Yi-Fang Ren, Yusuf Turek,
• Abstract summary: We show that SPACS-based postselected weak measurements can outperform conventional measurement schemes in terms of precision.<n>Our work offers a new way of addressing fundamental issues in quantum precision measurement based on photon statistics.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigated precision measurements in a two-level system coupled to a single-photon-added coherent state (SPACS) under postselection measurement. We analyzed strategies for improving measurement precision, including parameter estimation and the signal-to-noise ratio (SNR) in postselected weak measurements using the photon statistics of SPACS as the meter. Our results demonstrate that SPACS-based postselected weak measurements can outperform conventional measurement schemes in terms of precision. Additionally, we explicitly introduced an alternative weak measurement method commonly applied in dispersive light-atom interactions. Our work offers a new way for addressing fundamental issues in quantum precision measurement based on photon statistics, and it provides a method for extracting the phase and phase shifts of radiation fields through the weak values of system observables.

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