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December 6, 2025Advanced Quantum Technologies

Phase Sensitivity of Lossy Mach–Zehnder Interferometer via Photon Addition Operation

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Authors

XSXin SuCLCunjin Liu

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Overview

Analysis reveals improved phase sensitivity and robustness in interferometers with homodyne detection, suggesting advances in quantum precision measurements.

Key Points

  • Photon addition enhances phase sensitivity in lossy Mach–Zehnder interferometers with homodyne detection, optimizing performance.
  • Results indicate homodyne detection surpasses intensity difference detection under photon losses for better sensitivity.
  • This analysis employs quantum Fisher information to evaluate photon addition schemes under ideal and lossy conditions.
  • The approach may significantly improve methods for quantum precision measurements, informing future experimental designs.

Cite This Study

Su et al. (2025) studied this question.

synapsesocial.com/papers/69337cceb3f947a0a1259d22https://doi.org/10.1002/qute.202500881
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