A quantum teleportation network involving multiple users is essential for future quantum internet.So far,controlled quantum teleportation has been demonstrated in a three-user network.However,versatile and controlled ...A quantum teleportation network involving multiple users is essential for future quantum internet.So far,controlled quantum teleportation has been demonstrated in a three-user network.However,versatile and controlled quantum teleportation network involving more users is in demand,which satisfies different combinations of users for practical requirements.Here we propose a highly versatile and controlled teleportation network that can switch among various combinations of different users.We use a single continuous-variable six-partite Greenberger-Horne-Zeilinger(GHZ)state to realize such a task by choosing the different measurement and feedback operations.The controlled teleportation network,which includes one sub-network,two sub-networks and three sub-networks,can be realized for different application of user combinations.Furthermore,the coherent feedback control(CFC)can manipulate and improve the teleportation performance.Our approach is flexible and scalable,and would provide a versatile platform for demonstrations of complex quantum communication and quantum computing protocols.展开更多
目的研究颅内外动脉纡曲狭窄特点与临床表现及相关危险因素。方法2218例45～89岁患者行全脑血管造影术。根据数字减影血管造影（digital subtraction angiography，DSA）影像，将颅内外动脉形态分为动脉纡曲延长和狭窄，临床特点分为头...目的研究颅内外动脉纡曲狭窄特点与临床表现及相关危险因素。方法2218例45～89岁患者行全脑血管造影术。根据数字减影血管造影（digital subtraction angiography，DSA）影像，将颅内外动脉形态分为动脉纡曲延长和狭窄，临床特点分为头痛头昏、短暂性脑缺血发作（transient ischemic attack，TIA）和脑梗死，危险因素包括高齿鬏原发性高血压及糖尿病等。应用Х^2检验，对动脉纡曲延长、狭窄分布及临床特点进行比较。应用Logistic回归分析对颅内外动脉狭窄纡曲的危险因素进行多因素分析。结果2218例造影显示动脉纡曲延长和狭窄1816例，动脉纡曲延长发生率为76．1％，动脉狭窄发生率为23．9％。颈内动脉系统“S”型纡曲和“0”型纡曲临床表现为脑梗死分别为40．0％和47．9％。椎一基底动脉系统“S”型纡曲和“0”型纡曲临床表现为TIA，分别为57．6％和25．0％。颈内动脉系统重度狭窄临床表现为TIA（45．3％）和脑梗死（35．8％）。椎一基底动脉系统中、重度狭窄临床表现为TIA，分别为48．6％和48．4％。年龄（OR=3．28，95％ CI 2．16～4．75）、原发性高血压（OR=3．17，95％ CI 2．12～4．69）、体质指数（body mass index，BMI）（OR=2．95，95％CI 2．02-4．31）和糖尿病（OR=2．82，95％ CI 1．96～3．87）与颅内外动脉狭窄纡曲密切相关。结论颅内外动脉纡曲类型及狭窄程度与临床表现之间有明显相关性，颅内外动脉纡曲狭窄的危险因素主要为年龄、原发性高血压、BMI和糖尿病等。展开更多
基金Project supported by the Natural Science Foundation of Shanxi Province of China (Grant No. 202203021221214)the National Natural Science Foundation of China (Grant Nos. 62122044, 62135008, 61925503, 11904218, 12004276, 12147215, and 11834010)+4 种基金the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province of China (Grant Nos. 2019L0092 and 2020L0029)the Key Project of the National Key Research and Development Program of China (Grant No. 2022YFA1404500)the Program for the Innovative Talents of Higher Education Institutions of Shanxi Province of Chinathe Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxithe Fund for Shanxi “1331 Project” Key Subjects Construction
文摘A quantum teleportation network involving multiple users is essential for future quantum internet.So far,controlled quantum teleportation has been demonstrated in a three-user network.However,versatile and controlled quantum teleportation network involving more users is in demand,which satisfies different combinations of users for practical requirements.Here we propose a highly versatile and controlled teleportation network that can switch among various combinations of different users.We use a single continuous-variable six-partite Greenberger-Horne-Zeilinger(GHZ)state to realize such a task by choosing the different measurement and feedback operations.The controlled teleportation network,which includes one sub-network,two sub-networks and three sub-networks,can be realized for different application of user combinations.Furthermore,the coherent feedback control(CFC)can manipulate and improve the teleportation performance.Our approach is flexible and scalable,and would provide a versatile platform for demonstrations of complex quantum communication and quantum computing protocols.
文摘目的研究颅内外动脉纡曲狭窄特点与临床表现及相关危险因素。方法2218例45～89岁患者行全脑血管造影术。根据数字减影血管造影（digital subtraction angiography，DSA）影像，将颅内外动脉形态分为动脉纡曲延长和狭窄，临床特点分为头痛头昏、短暂性脑缺血发作（transient ischemic attack，TIA）和脑梗死，危险因素包括高齿鬏原发性高血压及糖尿病等。应用Х^2检验，对动脉纡曲延长、狭窄分布及临床特点进行比较。应用Logistic回归分析对颅内外动脉狭窄纡曲的危险因素进行多因素分析。结果2218例造影显示动脉纡曲延长和狭窄1816例，动脉纡曲延长发生率为76．1％，动脉狭窄发生率为23．9％。颈内动脉系统“S”型纡曲和“0”型纡曲临床表现为脑梗死分别为40．0％和47．9％。椎一基底动脉系统“S”型纡曲和“0”型纡曲临床表现为TIA，分别为57．6％和25．0％。颈内动脉系统重度狭窄临床表现为TIA（45．3％）和脑梗死（35．8％）。椎一基底动脉系统中、重度狭窄临床表现为TIA，分别为48．6％和48．4％。年龄（OR=3．28，95％ CI 2．16～4．75）、原发性高血压（OR=3．17，95％ CI 2．12～4．69）、体质指数（body mass index，BMI）（OR=2．95，95％CI 2．02-4．31）和糖尿病（OR=2．82，95％ CI 1．96～3．87）与颅内外动脉狭窄纡曲密切相关。结论颅内外动脉纡曲类型及狭窄程度与临床表现之间有明显相关性，颅内外动脉纡曲狭窄的危险因素主要为年龄、原发性高血压、BMI和糖尿病等。
