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Quantum-Enhanced Interferometer for Multiphase Sensing.

Yanni Feng1, Zhaoqing Zeng1, Jialin Cheng1

  • 1Shanxi University, State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Opto-Electronics, Taiyuan 030006, People's Republic of China.

Physical Review Letters
|November 17, 2025
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Summary
This summary is machine-generated.

This study introduces a quantum-enhanced interferometer for high-sensitivity multiparameter sensing. It achieves superior signal-to-noise ratios, crucial for biological applications, without increasing power consumption.

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Area of Science:

  • Quantum optics
  • Precision measurement
  • Quantum sensing

Background:

  • Quantum-enhanced interferometers are vital for single-parameter precision measurement.
  • Multiparameter precision measurement is fundamental for sensing and imaging.
  • High-sensitivity multiparameter sensing without increased power is challenging, especially for biological applications.

Purpose of the Study:

  • To propose and demonstrate a deterministic quantum-enhanced interferometer.
  • To achieve high-sensitivity multiparameter sensing by noise squeezing and signal amplification.
  • To enable simultaneous measurement of multiple signals with improved signal-to-noise ratio.

Main Methods:

  • Utilizing squeezed states of light in parallel and sequential configurations within the interferometer.
  • Implementing a quantum-enhanced three-arm interferometer design.
  • Comparing performance against conventional interferometers under identical power conditions.

Main Results:

  • Demonstrated a deterministic quantum-enhanced interferometer.
  • Achieved simultaneous measurement of joint and individual values of three signals.
  • Obtained a signal-to-noise ratio improvement of over 10.37±0.13 dB compared to conventional interferometers at the same power.

Conclusions:

  • This work represents a significant advancement in multiparameter sensing technology.
  • The developed interferometer offers high sensitivity without power escalation, beneficial for biological sciences.
  • The technology paves the way for observing elusive signals and broadens sensing and imaging applications.