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Reference-frame-independent quantum key distribution with two-way classical communication

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Chinese Physics B 2024年第10期33卷 146-152页

作者： Chun Zhou Hai-Tao Wang Yi-Fei Lu Xiao-Lei jiang Yan-Mei Zhao Yu Zhou Yang Wang jia-ji li Yan-Yang Zhou Xiang Wang Hong-Wei li Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhou 450001China

The data post-processing scheme based on two-way classical communication(TWCC)can improve the tolerable bit error rate and extend the maximal transmission distance when used in a quantum key distribution(QKD)*** this study,we apply the TWCC method to improve the performance of reference-frame-independent quantum key distribution(RFI-QKD),and analyze the influence of the TWCC method on the performance of decoy-state RFI-QKD in both asymptotic and non-asymptotic *** numerical simulation results show that the TWCC method is able to extend the maximal transmission distance from 175 km to 198 km and improve the tolerable bit error rate from 10.48%to 16.75%.At the same time,the performance of RFI-QKD in terms of the secret key rate and maximum transmission distance are still greatly improved when statistical fluctuations are *** conclude that RFI-QKD with the TWCC method is of practical interest.

关键词： quantum key distribution reference-frame-independent two-way classical communication

Security analysis of satellite-to-ground reference-frame-independent quantum key distribution with beam wandering

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Chinese Physics B 2024年第8期33卷 192-201页

作者：周淳赵燕美杨晓亮陆宜飞周雨姜晓磊汪海涛汪洋李家骥江木生汪翔张海龙李宏伟鲍皖苏 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

The reference-frame-independent(RFI)quantum key distribution(QKD)is suitable for satellite-based links by removing the active alignment on the reference ***,how the beam wandering influences the performance of RFI-QKD remains a pending issue in satellite-to-ground *** this paper,based on the mathematical model for characterizing beam wandering,we present the security analysis for satellite-to-ground RFI-QKD and analytically derive formulas for calculating the secret key rate with beam *** simulation results show that the performance of RFI-QKD is better than the Bennett–Brassard 1984(BB84)QKD with beam wandering in asymptotic ***,the degree of influences of beam wandering is specifically presented for satellite-to-ground RFI-QKD when statistical fluctuations are taken into *** work can provide theoretical support for the realization of RFI-QKD using satellite-to-ground links and have implications for the construction of large-scale satellite-based quantum networks.

关键词： quantum key distribution satellite-to-ground beam wandering

九寨沟区域多时空旅游碳排演化与形成因素分析

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环境科学导刊 2024年第5期43卷 12-15页

作者：颜文豪戢佳丽成都理工大学管理科学学院四川成都610059

采用生命周期评价法,选择了九寨沟景区作为案例地进行研究,通过计算不同时空背景下的交通碳排放和碳足迹数据,分析九寨沟景区交通碳排放的时空变化特征。研究发现九寨沟景区的交通碳排放呈现时空变化特征,与旅游需求和商业体系密切相关... 详细信息

采用生命周期评价法,选择了九寨沟景区作为案例地进行研究,通过计算不同时空背景下的交通碳排放和碳足迹数据,分析九寨沟景区交通碳排放的时空变化特征。研究发现九寨沟景区的交通碳排放呈现时空变化特征,与旅游需求和商业体系密切相关。提出了优化碳排放的策略和措施,包括建立基于物联网的全面的碳排放检测体系,以实现旅游业的可持续发展。

关键词：碳足迹碳排放旅游交通生态旅游

Effects of physical parameter range on dimensionless variable sensitivity in water flooding reservoirs

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Acta Mechanica Sinica 2006年第5期22卷 385-391页

作者： Yu Hu Bai jia Chun li ji Fu Zhou Division of Engineering Sciences Institute of MechanicsChinese Academy of Sciences Beijing 100080 China

The similarity criterion for water flooding reservoir flows is concerned with in the present paper. When finding out all the dimensionless variables governing this kind of flow, their physical meanings are subsequently elucidated. Then, a numerical approach of sensitivity analysis is adopted to quantify their corresponding dominance degree among the similarity parameters. In this way, we may finally identify major scaling law in different parameter range and demonstrate the respective effects of viscosity, permeability and injection rate.

关键词： Physical parameter range Dimensionless variable Sensitivity analysis Water flooding reservoir Two-phase flow in porous media

Reference-frame-independent quantum key distribution with an untrusted source

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Chinese Physics B 2020年第3期29卷 82-88页

作者： jia-ji li Yang Wang Hong-Wei li Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhou 450001China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

Reference frame independent quantum key distribution(RFI-QKD) allows two legitimate parties to share the common secret keys with the drift of reference frames. In order to reduce the actual requirements of RFI-QKD protocol on light source and make it more suitable for practical applications, this paper gives a specific description of RFI-QKD protocol with an untrusted source and analyzes the practical security of this protocol based on the two-way "plug and play" structure commonly used in practical systems. In addition, we also investigate the performance of RFI-QKD with an untrusted source considering statistical fluctuations based on Chernoff bound. Using simulations, we compare the secret key rate of RFIQKD with an untrusted source to RFI-QKD with trusted source. The results show that the performance of RFI-QKD with an untrusted source is similar to that of RFI-QKD with trusted source, and the finite data size clearly effects the performance of our protocol.

关键词： quantum key distribution reference frame independent finite key untrusted source

Asymmetric twin-field quantum key distribution with both statistical and intensity fluctuations

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Communications in Theoretical Physics 2020年第6期72卷 37-42页

作者： Shao-Fu He Yang Wang jia-ji li Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhouHenan 450001China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China

Twin-field quantum key distribution(TF-QKD)is a disruptive innovation which is able to overcome the rate-distance limit of QKD without trusted *** the proposal of the first TF-QKD protocol,theoretical and experimental breakthroughs have been made to enhance its ***,there still exist some practical issues waiting for *** this paper,we examine the performances of asymmetric TF-QKD protocol with unstable light sources and limited data *** statistical fluctuations of the parameters are estimated employing Azuma’s *** numerical simulations,we compare the secret key rates of the asymmetric TF-QKD protocol with different data sizes and variant intensity fluctuation *** results demonstrate that both statistical and intensity fluctuations have significant impacts on the performance of asymmetric TF-QKD.

关键词： twin-field quantum key distribution asymmetrical losses statistical fluctuations intensity fluctuations

A Construction of Authentication Codes with Arbitration from Vector Spaces over Finite Fields

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Journal of Mathematical Research and Exposition 2011年第2期31卷 269-278页

作者： Wei jia li ji Zhu NAN School of Mathematical Sciences Dalian University of Technology Liaoning 116024 P. R. China

This paper is devoted to constructing an authentication code with arbitration using subspaces of vector spaces over finite ***,if we choose the encoding rules of the transmitter and the decoding rules of the receiver according to a uniform probability distribution,then some parameters and the probabilities of successful attacks are computed.

关键词： authentication code with arbitration vector space finite field

Rapid chemical recycling of waste polyester plastics catalyzed by recyclable catalyst

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Green Chemical Engineering 2024年第2期5卷 257-265页

作者： Yu-ji Luo jia-Yin Sun Zhi li School of Physical Science and Technology ShanghaiTech UniversityShanghai201210China

Waste plastics are serious environmental threats due to their low degradability and low recycling *** and efficient waste plastics recycling technologies are urgently demanded for a sustainable ***,we report a rapid,closed-loop,and streamlined process to convert polyesters such as poly(ethylene terephthalate)(PET)back to its purified *** trifluoromethanesulfonic acid or metal triflates as the recyclable catalyst,polyesters such as PET can be completely depolymerized by simple carboxylic acids within 1 *** coupling this acidolysis with a subsequent hydrogenolysis process,the consumed carboxylic acid was recovered and the closed-loop of PET depolymerization could be *** catalysts and depolymerization agents are fully recycled while only PET and hydrogen are consumed.

关键词： Chemical recycling Waste polyester plastics Acidolysis Recyclable catalyst

Two-step method for creating a gastric tube during laparoscopic-thoracoscopic Ivor-Lewis esophagectomy

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World Journal of Gastroenterology 2017年第45期23卷 8035-8043页

作者： yu liu ji-jia li peng zu hong-xu liu zhan-wu yu yi ren Department of Thoracic Surgery Cancer Hospital of China Medical University/Liaoning Cancer Hospital and Institute

AIM To introduce a two-step method for creating a gastric tube during laparoscopic-thoracoscopic Ivor-Lewis esophagectomy and assess its clinical *** One hundred and twenty-two patients with middle or lower esophageal cancer who underwent laparoscopicthoracoscopic Ivor-Lewis esophagectomy at liaoning Cancer Hospital and Institute from March 2014 to March 2016 were included in this study,and divided into two groups based on the procedure used for creating a gastric tube. One group used a two-step method for creating a gastric tube,and the other group used the conventional method. The two groups were compared regarding the operating time,surgical complications,and number of stapler cartridges *** The mean operating time was significantly shorter in the two-step method group than in the conventional method group [238(179-293) min vs 272(189-347) min,P lications [14(21.9%) vs 13(22.4%),P= 0.55] or mean number of stapler cartridges used [5(4-6) vs 5.2(5-6),P = 0.007] between the two *** The two-step method for creating a gastric tube during laparoscopic-thoracoscopic Ivor-Lewis esophagectomy has the advantages of simple operation,minimal damage to the tubular stomach,and reduced use of stapler cartridges.

关键词： Minimally invasive srugery Gastric tube Ivor-Lewis esophagectomy