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Quantum-enhanced radiometry via approximate quantum error correction.

W Wang1, Z-J Chen2, X Liu3

  • 1Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing, 100084, P. R. China. wangwt2020@mail.tsinghua.edu.cn.

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This study demonstrates a quantum-enhanced sensing scheme using bosonic probes and error correction. The method achieves significant sensitivity enhancement in radiometry, paving the way for practical quantum technologies.

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Area of Science:

  • Quantum physics
  • Metrology
  • Quantum information science

Background:

  • Exotic quantum states offer potential for advanced metrology but are susceptible to noise, limiting practical quantum enhancement.
  • Existing quantum sensing methods face challenges with noise-induced degradation of quantum advantages.

Purpose of the Study:

  • To experimentally demonstrate a quantum-enhanced sensing scheme utilizing bosonic probes.
  • To overcome noise limitations in quantum sensing through novel approaches.
  • To achieve practical sensitivity enhancements for metrology applications.

Main Methods:

  • Employed a bosonic probe to leverage its large Hilbert space.
  • Developed and applied approximate quantum error correction techniques.
  • Utilized quantum jump tracking for enhanced measurement precision.

Main Results:

  • Achieved a 5.3 dB enhancement in sensitivity in a radiometry scenario.
  • Reached a sensitivity of 9.1 × 10-4 Hz-1/2 when measuring receiver mode excitation population.
  • Demonstrated the feasibility of quantum sensing with near-term quantum technologies.

Conclusions:

  • The developed quantum sensing scheme shows significant potential for practical applications.
  • The findings provide new insights into achieving quantum advantage in sensing.
  • Stimulates further research and development in bosonic quantum technologies.