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Experimental measurement-device-independent type quantum key distribution with flawed and correlated sources

Science Bulletin 2022年第21期67卷 2167-2175页

作者： Jie Gu Xiao-Yu Cao Yao Fu Zong-Wu He Ze-Jie Yin Hua-Lei Yin Zeng-Bing Chen National Laboratory of Solid State Microstructures and School of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China MatricTime Digital Technology Co.Ltd. Nanjing 211899China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China

The security of quantum key distribution(QKD)is severely threatened by discrepancies between realistic devices and theoretical ***,a significant framework called the reference technique was proposed to provide security against arbitrary source flaws under current technology such as state preparation flaws,side channels caused by mode dependencies,the Trojan horse attacks and pulse ***,we adopt the reference technique to prove security of an efficient four-phase measurement-device-independent QKD using laser pulses against potential source *** present a characterization of source flaws and connect them to experiments,together with a finite-key analysis against coherent *** addition,we demonstrate the feasibility of our protocol through a proof-of-principle experimental implementation and achieve a secure key rate of 253 bps with a 20 d B channel *** with previous QKD protocols with imperfect devices,our study considerably improves both the secure key rate and the transmission distance,and shows application potential in the practical deployment of secure QKD with device imperfections.

关键词： Measurement-device-independent Quantum key distribution reference technique Source flaw characterization Practical security

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Phase-matching quantum key distribution with imperfect sources

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Chinese Physics B 2023年第5期32卷 288-296页

作者：张晓旭陆宜飞汪洋江木生李宏伟周淳周雨鲍皖苏 Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhou 450001China Synergetic Innovation Centre of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Basic Department SSF IEUZhengzhou 450001China

The huge discrepancies between actual devices and theoretical assumptions severely threaten the security of quantum key ***,a general new framework called the reference technique has attracted wide attention in defending against the imperfect sources of quantum key ***,the state preparation flaws,the side channels of mode dependencies,the Trojan horse attacks,and the pulse classical correlations are studied by using the reference technique on the phase-matching *** simulation results highlight the importance of the actual secure parameters choice for transmitters,which is necessary to achieve secure *** the single actual secure parameter will reduce the secure key ***,as long as the parameters are set properly,the secure key rate is still *** the influences of multiple actual secure parameters will significantly reduce the secure key *** actual secure parameters must be considered when scientists calibrate *** work is an important step towards the practical and secure implementation of phase-matching *** the future,it is essential to study the main parameters,find out their maximum and general values,classify the multiple parameters as the same parameter,and give countermeasures.

关键词： quantum key distribution reference technique imperfect sources phase-matching

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