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August 20, 2025Chinese Physics B

The phase sensitivity of a lossy truncated SU(1,1) interferometer with double-port homodyne detection

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Authors

YXYunlong XiaoYJYue JiJWJun Wei

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Overview

Theoretical analysis reveals enhanced phase sensitivity using double-port homodyne detection in interferometers, suggesting improved measurement techniques.

Key Points

  • Double-port homodyne detection offers significantly better phase sensitivity than single-mode methods, demonstrating robustness against photon loss.
  • Theoretical models show that the two-mode coherent state achieves superior phase sensitivity, saturating the quantum Fisher information limit.
  • Analysis indicates the scheme's advantage over single-port detection, especially under ideal conditions and in the presence of photon loss.
  • Robustness against photon loss highlights the potential of the proposed interferometer design for practical applications.

Cite This Study

Xiao et al. (2025) studied this question.

synapsesocial.com/papers/68af495fad7bf08b1ead57fdhttps://doi.org/10.1088/1674-1056/adfd46
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  1. 1The Super Phase Sensitivity of an SU(1,1) Interferometer with a Two-Mode Squeezed Coherent State via Balanced Homodyne and Intensity Detection2026
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  4. 4Improving phase sensitivity of a hybridinterferometer with the two-mode squeezedcoherent state2024 · 5 citations
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