Author Affiliations
Abstract
School of Science and State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
Reference frame independent and measurement device independent quantum key distribution (RFI-MDI-QKD) has the advantages of being immune to detector side loopholes and misalignment of the reference frame. However, several former related research works are based on the unrealistic assumption of perfect source preparation. In this paper, we merge a loss-tolerant method into RFI-MDI-QKD to consider source flaws into key rate estimation and compare it with quantum coin method. Based on a reliable experimental scheme, the joint influence of both source flaws and reference frame misalignment is discussed with consideration of the finite-key effect. The results show that the loss-tolerant RFI-MDI-QKD protocol can reach longer key rate performance while considering the existence of source flaws in a real-world implementation.
quantum key distribution source flaw measurement device independence Chinese Optics Letters
2022, 20(9): 092701
为推进量子通讯平台的自动化,对量子密钥分发(QKD)层的软件部分进行了设计研究。 基于实验操作,通过编写对初学者友好的可视界面将实验流程封装起来,降低了对使用者编程水平的要求。 平台中的实验光路控制主要分为MFC, Labview及FPGA三部分。三者协同合作实现了集控制、扫描、判断于 一身的相位自扫描。基于所设计光路及软件搭建了量子通讯过程自动化操作平台,并实验证明了扫描的稳定性。
量子通信 量子密钥分发 光路控制 软件控制 quantum communication quantum key distribution optical path control software control
