量子密钥分配
量子纠缠
计算机科学
钥匙(锁)
量子信道
量子密码学
光子
物理
上下界
贝尔定理
密钥生成
干扰(通信)
量子
实现(概率)
量子网络
拓扑(电路)
量子隐形传态
量子信息
量子力学
计算机网络
密码学
数学
算法
计算机安全
统计
数学分析
频道(广播)
组合数学
作者
Yuan-Mei Xie,Bing-Hong Li,Yu-Shuo Lu,Xiaoyu Cao,Wenbo Liu,Hua-Lei Yin,Zeng-Bing Chen
出处
期刊:Optics Letters
[The Optical Society]
日期:2021-03-23
卷期号:46 (7): 1632-1632
被引量:16
摘要
Device-independent quantum key distribution (DIQKD) exploits the violation of a Bell inequality to extract secure key even if the users' devices are untrusted. Currently, all DIQKD protocols suffer from the secret key capacity bound, i.e., the secret key rate scales linearly with the transmittance of two users. Here we propose a heralded DIQKD scheme based on entangled coherent states to improve entangling rates whereby long-distance entanglement is created by single-photon-type interference. The secret key rate of our scheme can significantly outperform the traditional two-photon-type Bell-state measurement scheme and, importantly, surpass the above capacity bound. Our protocol therefore is an important step towards a realization of DIQKD and can be a promising candidate scheme for entanglement swapping in future quantum internet.
科研通智能强力驱动
Strongly Powered by AbleSci AI