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Nonadiabatic Geometric Quantum Computation with Asymmetric Superconducting Quantum Interference Device

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Communications in Theoretical Physics 2002年第9期37卷 285-291页

作者： hao san-ru HOU Bo-Yu XI Xiao-Qiang YUE rui-Hong Institute of Modern Physics Northwest University Xi''an 710069 China Galculating Physics Division Department of Computer Teaching Hunan Normal University Changsha 410081 China Institute of Modern Physics Northwest University Xi''an 710069 China Institute of Modern Physics Northwest University Xi''an 710069 China Institute of Modern Physics Northwest University Xi''an 710069 China

We propose a method of controlling the dc-SQUID (superconducting quantum interference device) system by changing the gate voltages, which controls the amplitude of the fictitious magnetic fields B-z, and the externally applied current that produces the piercing magnetic flux Phi(x) for the dc-SQUID system. We have also introduced a physical model for the dc-SQUID system. Using this physical model, one can obtain the non-adiabatic geometric phase gate for the single qubit and the non-adiabatic conditional geometric phase gate (controlled NOT gate) for the two qubits. It is shown that when the gate voltage and the externally applied current of the dc-SQUID system satisfies an appropriate constraint condition, the charge state evolution can be controlled exactly on a dynamic phase free path. The non-adiabatic evolution of the charge states is given as well.

关键词： non-adiabatic geometric phase gate dc-SQUID quantum computation

Optimal Conclusive Teleportation of an Arbitrary d-Dimensional N-Particle Unknown State via a Partially Entangled Quantum Channel

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Communications in Theoretical Physics 2003年第2期39卷 157-166页

作者： hao san-ru Hou Bo-Yu Xi Xiao-Qiang Yue rui-Hong Institute of Modern Physics Northwest University Xi'an 710069 China

In the paper we generalize the standard teleportation to the conclusive teleportation case which can teleportan arbitrary d-dimensional N-particle unknown state via the partially entangled quantum channel. We show that onlyif the quantum channel satisfies a constraint condition can the most general d-dimensional N-particle unknown state beperfect conclusively teleported. We also present a method for optimal conclusively teleportation of the N-particle statesand for constructing the joint POVM which can discern the quantum states on the sender's (Alice's) side. Two typicalexamples are given so that one can see how our method works.

关键词： N-粒子态量子隧道光学远距传物

Accessible Information for Equally-Distant Partially-Entangled Alphabet State Resource

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Communications in Theoretical Physics 2002年第2期37卷 149-154页

作者： hao san-ru Hou Bo-Yu Xi Xiao-Qiang Yue rui-Hong Institute of Modern Physics Northwest University Xi'an 710069 China

We have proposed a quantum system with equally-distant partially-entangled alphabet states which hasthe minimal mutual overlap and the highly distinguishability, these quantum states are used as the "signal states" ofthe quantum communication. We have also constructed the positive operator-valued measure for these "signal states"and discussed their entanglement properties and measurement of cntanglement. We calculate the accessible informationfor these alphabet states and show that the accessible information is closely related to the entanglement of the "signalstates": the higher the entanglement of the "signal states", the better the accessible information of the quantum *** the accessible information reaches its maximal value when the alphabet states have their maximal entanglemcnt.

关键词：量子系统可获信息部分交缠态

Average mutual information of the random block-message ensembles for many-letters

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Chinese Physics B 2002年第5期11卷 450-455页

作者： hao san-ru(郝三如) Hou Bo-Yu(侯伯宇) Institute of Modern Physics Northwest University Xi'an 710069 China Department of Computer Teaching Hunan Normal University Changsha 410081 China Department of Computer Teaching Hunan Normal University Changsha 410081 China

By making use of the theoretical framework presented by Bostroem (K. J. Bostroem, LANL quant-ph/0009052), wegeneralize the standard quantum information theory of block messages with fixed block length to the variable one. Weshow that the states belonging to a sufficiently large Hilbert space are the highly distinguishable states. We also considerthe collection states (product states of more than one qubit state) and seek a 'pretty good measurement' (PGM) withmeasurement vectors to improve the mutual information. The average mutual information over random block-messageensembles with variable block length n is discussed in detail.

关键词： mutual information random block message many-letter ensemble

用外加驱动场压缩有热槽相互作用二态量子系统的退相干性

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物理学报 2000年第4期49卷 610-614页

作者：郝三如王麓雅湖南师范大学计算机教学部计算物理研究室长沙410081

讨论了具有热槽相互作用二态量子系统在外加驱动场作用下的退相干性问题 ,推导了二态量子系统密度算子非对角矩阵元的时间演化关系 .确定了外加驱动场与退相干性之间的关系 ,并建立了退相干性消除时外加场必须满足的约束方程 .

关键词：外加驱动场量子计算机二态量子系统退相干性

How to control a geometric quantum gate

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Chinese Physics B 2002年第2期11卷 109-114页

作者： hao san-ru(郝三如) Hou Bo-Yu(侯伯宇) Xi Xiao-Qiang(惠小强) Yue rui-Hong(岳瑞宏) Calculating Physics Division Department of Computer Teaching Hunan Normal University Changsha 410081 China Institute of Modern Physics Northwest University Xi'an 710069 China Institute of Modern Physics Northwest University Xi'an 710069 China

In this paper, we detail the theoretical ideas which are used to explain the mechanism of the laser controlling thegeometric quantum gates introduced in the work by Ekert et al. (Ekert A, Ericsson M, Hayden P, Inanori H, Jones JA, Oi D K L and Vedral V 2000 J. Mod. Opt. 47 2501). We have introduced a two-level Hamiltonian system, anddirected to solve this system, and then obtained the probability distribution of this two-level system. We also show therelationships between the external laser fields and the transition of the qubit in the two-qubit controlled-phase gate,and how the transition of the qubit depends on the external laser fields and the states of the controlled qubit.

关键词： laser controlling mechanism geometric quantum gate two-level system

q-变形Jaynes-Cummings模型及超相干态(英文)

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湖南师范大学自然科学学报 2001年第2期24卷 37-42页

作者：郝三如王麓雅湖南师范大学计算机教学部中国长沙410081

建立了一个ｑ－变形Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇ（ＪＣ）模型，构造了其相应的ｑ－超相干态（ｑ－ＳＣＳｓ）；讨论了ｑ－超相干态的性质，给出了完备性关系表达式，并给出了ｑ－变形ＪＣ模型的ｑ－超相干态的表示，

关键词： q-变形JC模型 q-超相干态 q-相干态表示性质

A Biomimetic Rotor-configuration Design for Optimal Aerodynamic Performance in Quadrotor Drone

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Journal of Bionic Engineering 2021年第4期18卷 824-839页

作者： Yi Li Koichi Yonezawa ru Xu hao Liu Graduate School of Engineering Chiba University1-33 Yayoi-choInage-kuChiba263-8522Japan Central Research Institute of Electric Power Industry Civil Engineering Research Laboratory1646 AbikoAbiko-shi270-1194Japan

Motivated by optimal combination of paired wings configuration and troke-plane inclination in biological flapping flights that can achieve high aerodynamic performance,we propose a biomimetic rotor-configuration design to explore optimal aerodynamic performance in multirotor *** aerodynamic interactions among propellers in multirotor Unmanned Aerial Vehicles(UAVs)play a crucial role in lift force production and Figure of Merit(FM)efficiency,the rotor-configuration effect remains poorly *** we address a Computational Fluid Dynamics(CFD)-based study on optimal aerodynamic performance of the rotor-configuration in hovering quadrotor drones with a specific focus on the aerodynamic effects of tip distance,height difference and tilt angle of *** results indicate that the tip distance-induced interactions can most alter lift force production and hence lead to remarked improvement in FM,and the height difference also plays a key role in improving aerodynamic performance,while the tilt angle effect is less ***,we carried out an extensive analysis to explore the optimal aerodynamic performance of the rotor-configuration over a broad parameter space,by combining the CFD-based simulations and a novel surrogate *** find that a rotor-configuration with a large tip distance and some height difference with zero tilt angle is capable of optimizing both lift force production and FM,which could offer a novel optimal design as well as maneuver strategy for multirotor UAVs.

关键词： bioinspiration optimal quadrotor configuration aerodynamic interactions aerodynamic performance CFD surrogate modeling

Surrounding rock control of gob-side entry driving with narrow coal pillar and roadway side sealing technology in Yangliu Coal Mine

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International Journal of Mining Science and Technology 2017年第5期27卷 819-823页

作者： Zha Wenhua Shi hao Liu san Kang Changhao Key Laboratory of Safe and Effective Coal Mining School of Mining and Safety EngineeringAnhui University of Science&TechnologyMinistry of EducationHuainan 232001China

Gob-side entry driving can increase coal recovery ratio, and it is implied in many coal mines. Based on geological condition of 10416 working face tailentry in Yangliu Coal Mine, the surrounding rock deformation characteristics of gob-side entry driving with narrow coal pillar is analysed, reasonable size of coal pillar and reasonable roadway excavation time after mining are achieved. Surrounding rock control technology and effective roadway side sealing technology are proposed and are taken into field practice. The results showed that a safer and more efficient mining of working face can be achieved. In addition, results of this paper also have important theoretical significance and valuable reference for surrounding rock control technology of gob-side entry driving with narrow coal pillar under special geological condition.

关键词： Narrow coal pillar Gob-side entry driving Surrounding rock control Roadway side sealing technology