Polarization compensation for entanglement-based quantum key distribution.

IF 3.3 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2025-09-08 DOI:10.1364/OE.573091
Shi-Hua Yin, Tian-Wang Luo, Wen-Juan Jiang, Xi-Yu Liu, Ya-Fei Yu, Zheng-Jun Wei, Tian-Ming Zhao, Jun-Bin Fang, Jin-Dong Wang
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引用次数: 0

Abstract

In quantum key distribution (QKD) systems using polarization entanglement, channel polarization perturbations significantly compromise both efficiency and security. To address the slow response and instability of current entanglement-based polarization compensation techniques for entanglement-based quantum key distribution, we propose a polarization compensation scheme based on an adaptive gradient descent algorithm. The system's performance is tested over a 10 km single-sided fiber channel. Results show that this scheme maintains long-term stability of the polarization state under both random and periodic perturbations. The average compensation time is 248 ms, with an entanglement source average visibility of 83.43% and an average quantum error rate of 8.28%. This method effectively mitigates polarization perturbation in entanglement-based quantum key distribution (QKD). These results are pivotal for the development of long-distance, multi-node quantum communication networks.

基于纠缠态量子密钥分配的偏振补偿。
在使用偏振纠缠的量子密钥分配系统中,信道偏振摄动严重影响了效率和安全性。针对当前基于纠缠的量子密钥分配偏振补偿技术响应缓慢和不稳定的问题,提出了一种基于自适应梯度下降算法的偏振补偿方案。该系统的性能在10公里单面光纤通道上进行了测试。结果表明,该方案在随机扰动和周期扰动下均能保持极化态的长期稳定性。平均补偿时间为248 ms,纠缠源平均可见度为83.43%,平均量子误差率为8.28%。该方法有效地缓解了基于纠缠态的量子密钥分配(QKD)中的极化扰动。这些结果对于远距离、多节点量子通信网络的发展至关重要。
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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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