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纠缠测量提升两比特量子态分辨效率(特邀)

激光与光电子学进展 2024年第3期61卷 281-284页

作者：田博轩侯志博项国勇中国科学技术大学中国科学院量子信息重点实验室安徽合肥230026

在给定错误率下,减小量子态分辨中平均消耗的拷贝数,称为最小消耗量子态分辨。最小消耗量子态分辨可以把节省的资源用于后续量子任务,在量子密码等量子任务中具有重要的应用价值。研究了两比特量子态的最小消耗量子态分辨。理论结果表明... 详细信息

在给定错误率下,减小量子态分辨中平均消耗的拷贝数,称为最小消耗量子态分辨。最小消耗量子态分辨可以把节省的资源用于后续量子任务,在量子密码等量子任务中具有重要的应用价值。研究了两比特量子态的最小消耗量子态分辨。理论结果表明,即使两比特量子态只有经典关联,没有量子纠缠,纠缠测量仍能远超对两个比特分别进行局域测量的效果。实验结果证实,当错误率要求足够小时,纠缠测量实验装置消耗的拷贝数仅为局域测量的1/12,就可满足错误率要求。该研究结果突出了纠缠测量在最小消耗量子态分辨中的作用,显示了量子测量中纠缠的重要意义。

关键词：量子测量量子控制量子分辨量子信息

Balancing the minimum error rate and minimum copy consumption in quantum state discrimination

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中国科学技术大学学报 2024年第7期54卷 40-42,39,I0002,I0003页

作者： Boxuan Tian zhibo hou Guo-Yong Xiang Chuan-Feng Li Guang-Can Guo CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center For Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

Extracting more information and saving quantum resources are two main aims for quantum ***,the optimization of strategies for these two objectives varies when discriminating between quantum states■and■through multiple *** this study,we introduce a novel state discrimination model that reveals the intricate relationship between the average error rate and average copy *** integrating these two crucial metrics and minimizing their weighted sum for any given weight value,our research underscores the infeasibility of simultaneously minimizing these metrics through local measurements with one-way *** findings present a compelling trade-off curve,highlighting the advantages of achieving a balance between error rate and copy consumption in quantum discrimination tasks,offering valuable insights into the optimization of quantum resources while ensuring the accuracy of quantum state discrimination.

关键词： quantum measurement quantum control quantum state discrimination

Data collection of wireless sensor network based on trajectory optimization of laser-charged UAV

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High-Confidence Computing

High-Confidence Computing 2024年第2期4卷 116-128页

作者： Chuanwen Luo Jian Zhang Jin Qian Yi Hong zhibo Chen Yunan hou Xiujuan Zhang Yuqing Zhu School of Information Science and Technology Beijing Forestry UniversityBeijing 100083China Engineering Research Center for Forestry-Oriented Intelligent Information Processing of National Forestry and Grassland Administration Beijing 100083China College of Information Engineering Taizhou UniversityTaizhou 225300China School of Computer Science Qufu Normal UniversityRizhao 276826China Research Center of Applied Mathematics and Machine Intelligence Zhejiang LabHangzhou 311121China Department of Computer Science California State UniversityCA 90032USA

Unmanned Aerial Vehicle(UAV)can be used as wireless aerial mobile base station for collecting data from sensors in UAV-based Wireless Sensor Networks(WSNs),which is crucial for providing seamless services and improving the performance in the next generation wireless ***,since the UAV are powered by batteries with limited energy capacity,the UAV cannot complete data collection tasks of all sensors without energy replenishment when a large number of sensors are deployed over large monitoring *** overcome this problem,we study the Real-time Data Collection with Lasercharging UAV(RDCL)problem,where the UAV is utilized to collect data from a specified WSN and is recharged using Laser Beam Directors(LBDs).This problem aims to collect all sensory data from the WSN and transport it to the base station by optimizing the flight trajectory of UAV such that realtime data performance is ensured It has been proven that the RDCL problem is *** address this,we initially focus on studying two sub-problems,the Trajectory Optimization of UAV for Data Collection(TODC)problem and the Charging Trajectory Optimization of UAV(CTO)problem,whose objectives are to find the optimal flight plans of UAV in the data collection areas and charging areas,*** we propose an approximation algorithm to solve each of them with the constant ***,we present an approximation algorithm that utilizes the solutions obtained from TODC and CTO problems to address the RDCL ***,the proposed algorithm is verified by extensive simulations.

关键词： Wireless sensor networks Laser-charged UAV Trajectory optimization Data collection

Taking tomographic measurements for photonic qubits 88 ns before they are created

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Chinese Physics B 2021年第4期30卷 55-60页

作者： zhibo hou Qi Yin Chao Zhang Han-Sen Zhong Guo-Yong Xiang Chuan-Feng Li Guang-Can Guo Geoff J.Pryde Anthony Laing Key Laboratory of Quantum Information University of Science and Technology of ChinaCASHefei 230026China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Centre for Quantum Computation and Communication Technology(CQC2T)and Centre for Quantum Dynamics Griffith UniversityBrisbane4111Australia Quantum Engineering and Technology Laboratories School of Physics and Department of Electrical and Electronic EngineeringUniversity of BristolUK

We experimentally demonstrate that tomographic measurements can be performed for states of qubits before they are prepared.A variant of the quantum teleportation protocol is used as a channel between two instants in time,allowing measurements for polarization states of photons to be implemented 88 ns before they are *** data taken at the early time and later unscrambled according to the results of the protocol’s Bell measurements,produces density matrices with an average fidelity of 0.90±0.01 against the ideal states of photons created at the later *** tomography of the time reverse quantum channel finds an average process fidelity of 0.84±*** our proof-of-principle implementation necessitates some post-selection,the general protocol is deterministic and requires no post-selection to sift desired states and reject a larger ensemble.

关键词： teleportation tomography time reverse

Experimental verification of quantum precision limit in adaptive qubit statetomography

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Experimental verification of quantum precision limit in adap...

第十六届全国量子光学学术报告会

作者： zhibo hou Guoyong Xiang Chuanfeng Li Guangcan Guo Huangjun Zhu Key Laboratory of Quantum Information USTCCAS

＜正＞Quantum state tomograpy is a primitive of various quantum information processing tasks,such as quantum computation,communication,and cryptography[1–3].The precision limit in quantum state estimation is of great interest not only to practical applications but also to foundational ***,little is known about this subject

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环境税“双重红利”假说文献述评

财贸经济 2010年第6期31卷 60-65页

作者：刘晔周志波厦门大学财政系

环境税的思想源于外部性理论,其最初目的在于消除由于污染导致的负外部性,以提高资源配置的效率。为了矫正环境污染的负外部性,自20世纪60年代起,西方理论界对环境税进行了深入研究,西方各国也开始了一轮环境税改革运动。作为20世纪OEC... 详细信息

环境税的思想源于外部性理论,其最初目的在于消除由于污染导致的负外部性,以提高资源配置的效率。为了矫正环境污染的负外部性,自20世纪60年代起,西方理论界对环境税进行了深入研究,西方各国也开始了一轮环境税改革运动。作为20世纪OECD国家进行环境税改革的重要理论依据,"双重红利"假说的提出及其后继研究具有重要的理论和实践意义。但是,"双重红利"是否存在,理论界至今未有结论。本文将对已有的有关环境税改革与"双重红利"的研究进行梳理,就已有的研究成果进行一个综述总结,最后简要评价其对我国环境税改革的启示。

关键词：环境税改革绿色税收双重红利最优税制

Simultaneously optimal multi-parameter estimation without tradeoff via quantum control

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Simultaneously optimal multi-parameter estimation without tr...

骨桥蛋白下调对前列腺癌PC3细胞生物学行为的影响

第十八届全国量子光学学术会议

作者： Jun-Feng Tang zhibo hou Haidong Yuan 项国勇 Chuan-Feng Li Guang-Can Guo Key Laboratory of Quantum Information University of Science and Technology of ChinaCAS Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Department of Mechanical and Automation Engineering The Chinese University of Hong Kong 中科大

Optimal multi-parameter estimation is an important problem in quantum metrolgoy. Unlike single-parameter estimation, it is commenly believed that simultaneous optimal estimation of all parameters in multi-parameter dynamics is impossible since the optimal estimation schemes for each parameter are incompatible. This tradeoff does exist in optimal entangled parallel schemes [1, 2], which uses many-body entanglement as quantum resources and are commonly believed to be the most efficient. Here we experimentally demonstrate, for the first time, simultaneous optimal estimation of all three parameters in a unitary qubit operation, using sequential measurements. Our sequential measurement cancels this tradeoff restriction by using an entangled ancilla, optimal control and deterministic Bell measurments between probe and ancilla [2, 4]. Up to eight controls in our experiments are realized, resulting a 2.4-fold, 9-fold and 72-fold improvement than entangled parallel scheme, individual measurement scheme and shot-noise limit, respectively. Our scheme is scalable since no multipartite entangled states or multipartite entangled measurements are needed. This work contradicts with the long belief of inevitable tradeoff in simultaneous multi-parameter estimation, and prevails against entangled parallel scheme in practical simplicity, scalability and also precision.

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肿瘤 2005年第6期25卷 542-546页

作者：侯志波郑杰东南大学基础医学院病理学系分子病理研究所

目的观察骨桥蛋白(***)下调后对前列腺癌PC3细胞生物学行为的影响。方法构建针对OPN的siRNA(small interference RNA)表达质粒,用脂质体方法转染PC3细胞。RT-PCR和Western blot检测转染后PC3细胞OPN的表达；MTT比色法和流式细胞仪检测PC... 详细信息

目的观察骨桥蛋白(***)下调后对前列腺癌PC3细胞生物学行为的影响。方法构建针对OPN的siRNA(small interference RNA)表达质粒,用脂质体方法转染PC3细胞。RT-PCR和Western blot检测转染后PC3细胞OPN的表达；MTT比色法和流式细胞仪检测PC3细胞OPN下调对细胞的生长和细胞周期的影响；软琼脂生长实验检测OPN下调后对PC3细胞集落形成的影响。结果 RT-PCR和Western blot证实经RNA干扰介导的PC3细胞存在OPN表达下调,转染的细胞生长受抑制,出现细胞周期S期阻滞和细胞凋亡,在软琼脂上的细胞集落形成率下降。结论经RNA干扰的选择性OPN下调可使PC3细胞在S期阻滞并出现细胞凋亡,细胞的恶性程度下降。

关键词：前列腺肿瘤,细胞学 RNA,小干扰骨桥蛋白细胞凋亡恶性类癌综合征基因表达

Research on the Lipase from Microorganisms for Catalytic Resolution of (R)-Naproxen

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Research on the Lipase from Microorganisms for Catalytic Res...