Four-state reference-frame-independent quantum key distribution using heralded pair-coherent sources with source flaws

• 作者: FENG Bao ZHAO Ziyan YANG Shunyu DOU Tianqi LI Zhenhua WANG Jipeng SUN Zhongqi ZHOU Fen HAN Yanxin HUANG Yuqing MA Haiqiang
• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2021,（10）
• 所属期刊栏目: Quantum Information
• 页码范围: 636-640
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11801-021-0197-0

摘要

We propose a four-state reference-frame-independent quantum key distribution(RFI-QKD)protocol with the heralded pair-coherent source(HPCS).We investigate the performance of the proposed protocol and simulation results show that our protocol can achieve a high key generation rate in long-distance transmission,taking source flaws and statisti-cal fluctuations into consideration.Although fewer states are used,this protocol not only has a higher key generation rate at the same transmission distance but also a longer transmission distance with the same secure communication compared with the original six-state RFI-QKD protocol using the weak coherent source(WCS).