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Practical Real-Time Phase Drift Compensation Scheme for Quantum Communication Systems.

Xiaotian Song1, Chunsheng Zhang1, Dong Pan1

  • 1Beijing Academy of Quantum Information Sciences, Beijing 100193, China.

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|October 28, 2023
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Summary
This summary is machine-generated.

This study introduces a real-time phase drift compensation method for quantum communication systems. The technique uses existing data to ensure stable, continuous transmission with a low quantum bit error rate.

Keywords:
phase driftquantum communicationreal-time phase compensation

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Area of Science:

  • Quantum Information Science
  • Optical Communication Systems

Background:

  • Quantum communication systems face challenges from environmental perturbations.
  • Phase drift is a critical issue affecting the stability and reliability of quantum transmissions.

Purpose of the Study:

  • To propose an efficient real-time phase drift compensation scheme for quantum communication.
  • To ensure continuous operation of phase-encoding quantum communication systems.

Main Methods:

  • Developed a closed-loop control subsystem for phase tracking using only existing quantum communication data.
  • Implemented a real-time compensation strategy to counteract phase drift.

Main Results:

  • Demonstrated the effectiveness and feasibility of the proposed compensation scheme.
  • Achieved an average quantum bit error rate of 1.60% over 16 hours of continuous operation.
  • Observed a low standard deviation of 0.0583% in the quantum bit error rate, indicating high stability.

Conclusions:

  • The proposed real-time phase drift compensation scheme is effective for quantum communication systems.
  • The method ensures stable, continuous transmission by accurately tracking and compensating for phase drift.
  • The scheme offers a practical solution for enhancing the reliability of quantum communication.