Song Xiaotian, Zhang Chunsheng, Pan Dong, Wang Min, Guo Jianxing, Zhang Feihao, Long Guilu
Beijing Academy of Quantum Information Sciences, Beijing 100193, China.
State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China.
Entropy (Basel). 2023 Oct 1;25(10):1408. doi: 10.3390/e25101408.
Quantum communication systems are susceptible to various perturbations and drifts arising from the operational environment, with phase drift being a crucial challenge. In this paper, we propose an efficient real-time phase drift compensation scheme in which only existing data from the quantum communication process is used to establish a stable closed-loop control subsystem for phase tracking. This scheme ensures the continuous operation of transmission by tracking and compensating for phase drift in the phase-encoding quantum communication system. The experimental results demonstrate the effectiveness and feasibility of the proposed scheme with an average quantum bit error rate of 1.60% and a standard deviation of 0.0583% for 16 h of continuous operation.
量子通信系统容易受到来自运行环境的各种扰动和漂移的影响，其中相位漂移是一个关键挑战。在本文中，我们提出了一种高效的实时相位漂移补偿方案，该方案仅利用量子通信过程中的现有数据来建立一个用于相位跟踪的稳定闭环控制子系统。该方案通过跟踪和补偿相位编码量子通信系统中的相位漂移来确保传输的连续运行。实验结果证明了该方案的有效性和可行性，在连续运行16小时的情况下，平均量子误码率为1.60%，标准差为0.0583%。
