在20公里长的光纤通道上进行决定性纠辅助量子通信
Siyu Ren1, Yanru Yan1, Yalin Li1
1State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan, China.
Light, science & applications
|January 23, 2026
概括
研究人员使用连续变量纠状态在20公里长的光纤通道上演示了确定性纠辅助量子通信. 这种先进的量子通信方法与传统方法相比,实现了3倍的通道容量.
科学领域:
- 量子信息科学 量子信息科学
- 量子通信技术 量子通信技术
- 光纤通讯 光纤通讯
背景情况:
- 纠辅助量子通信利用量子纠来增强信息传输.
- 目前的密集编码方案在很大程度上局限于原则证明实验.
- 延长量子通信距离对于实际应用至关重要.
研究的目的:
- 通过实验证明长距离光纤通道的决定性纠辅助量子通信.
- 提出和验证一种新的连续变量 (CV) 密集编码方案,以改进经典信号传输.
- 提高量子通信系统的通道容量.
主要方法:
- 利用连续变量 (CV) 纠状态用于量子通信.
- 实施了新的CV密度编码方案,并增强了经典信号.
- 采用频率分割多重复合来解码多个经典信号.
- 通过20.121公里的商业光纤通道传输信号.
主要成果:
- 在20公里光纤上成功展示了确定性纠辅助量子通信.
- 实现了CV纠辅助量子通信的延长传输距离.
- 同时解码了 10 个沉浸在枪声中的经典信号.
- 与连贯状态的经典通信相比,获得了大约3倍的通道容量.
结论:
- 拟议的CV密度编码方案显著提高了纠辅助量子通信性能.
- 这项工作代表了朝着实用的,大都会规模的纠辅助量子通信的关键进步.
- 结果为在现实世界的场景中建立强大的量子通信网络铺平了道路.
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