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Quantum Sensing with a Single-Qubit Pseudo-Hermitian System.

Yaoming Chu1, Yu Liu1, Haibin Liu1

  • 1School of Physics, International Joint Laboratory on Quantum Sensing and Quantum Metrology, Huazhong University of Science and Technology, Wuhan 430074, China.

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This summary is machine-generated.

This study introduces a novel pseudo-Hermitian sensor for quantum sensing. This new sensor design can overcome noise limitations that traditional methods cannot, enhancing measurement precision.

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Area of Science:

  • Quantum physics
  • Quantum sensing
  • Non-Hermitian physics

Background:

  • Quantum sensing utilizes quantum system properties for precise physical quantity measurements.
  • Existing quantum sensors face limitations with certain types of noise.

Purpose of the Study:

  • To propose a strategy for a single-qubit pseudo-Hermitian sensor.
  • To explore the advantages of pseudo-Hermitian systems in quantum sensing applications.

Main Methods:

  • Realizing a single-qubit pseudo-Hermitian sensor from a dilated two-qubit Hermitian system.
  • Analyzing the sensor's dynamical evolution and susceptibility.

Main Results:

  • The pseudo-Hermitian sensor exhibits divergent susceptibility during dynamical evolution.
  • Demonstrated potential to overcome noise irreducible by repetitive measurements.

Conclusions:

  • The proposed pseudo-Hermitian sensor is feasible with current experimental capabilities.
  • This work advances the application of non-Hermitian physics in quantum sensing.