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Experimental demonstration of quantum transport enhancement using time-reversal symmetry breaking on a silicon photonic chip

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Science China(Physics,Mechanics & Astronomy) 2022年第10期65卷 2-9页

作者： Yang Wang Xinyao Yu Shichuan Xue Yizhi Wang Junwei Zhan Chao Wu pingyu zhu Qilin Zheng Miaomiao Yu Yingwen Liu Xiaogang Qiang Junjie Wu Xuejun Yang Ping Xu Institute for Quantum Information&State Key Laboratory of High Performance Computing College of Computer Science and TechnologyNational University of Defense TechnologyChangsha 410073China National Innovation Institute of Defense Technology Academy of Military SciencesBeijing 100071China National Laboratory of Solid State Microstructures and School of Physics Nanjing UniversityNanjing 210093China

The continuous-time quantum walk is a basic model for studying quantum transport and developing quantum-enhanced algorithms. Recent studies show that by introducing a phase into the standard continuous-time quantum walk model, the time-reversal symmetry can be broken without changing the Hermitian property of the Hamiltonian. The time-reversal symmetry breaking quantum walk shows advantages in quantum transport, such as perfect state transfer, directional control, transport speedup, and quantum transport efficiency enhancement. In this work, we implement the time-reversal symmetry breaking quantum walks on a reconfigurable silicon photonic chip and demonstrate the enhancement introduced by breaking time-reversal symmetry. Perfect state transfer on a three-site ring, a quantum switch implemented on a six-site graph, and transport speedup using a linear chain of triangles are demonstrated with high fidelity. Time-reversal asymmetry has also been used in a simplified light-harvesting model,implying the potential of time-reversal symmetry breaking in photosynthesis investigations.

关键词： quantum walk time-reversal asymmetry quantum transport

The Application of Eddy Current Transducer for Testing Movement Locus of Shaker Screen

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工程科学（英文版） 2007年第1期5卷 85-89页

作者： zhu pingyu Lao Chuanjun Zhang Wei Li Xuejun Key Lab of Health Maintenance for Mechanical Equipment of Hunan Province Hunan University of Science and TechnologyXiangtanHunan411201 Xiangtan Colliery Machine Stock Ltd Xiangtan Hunan411201

Shaker screen is one of important equipments in the industry of oil, metallurgy, coal and timbering. The movement locus of shaker screen affects the capacity and efficiency of shaker screen to split the solid particle from crude ore directly. To test movement of shaker locus, two eddy current transducers are employed. A discussion of the usage of these eddy current transducer to test and acceleration sensors will be made. The experiment results from a real elliptic shaker screen have good agree with the design requirements.

关键词： shaker screen movement locus test eddy current transducer

Bright 547-dimensional Hilbert-space entangled resource in 28-pair modes biphoton frequency comb from a reconfigurable silicon microring resonator

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Chinese Physics B 2022年第2期31卷 129-134页

作者： Qilin Zheng Jiacheng Liu Chao Wu Shichuan Xue pingyu zhu Yang Wang Xinyao Yu Miaomiao Yu Mingtang Deng Junjie Wu Ping Xu Institute for Quantum Information and State Key Laboratory of High Performance Computing College of Computer.National University of Defense TechnologyChangsha 410073China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410013China National Laboratory of Solid State Microstructures and School of Physics Nanjing University.Nanjing 210093China

High-dimensional entanglement provides valuable resources for quantum technologies,including quantum communication,quantum optical coherence tomography,and quantum *** a high brightness and dimensional entanglement source has significant *** we utilize a tunable asymmetric Mach–Zehnder interferometer coupled silicon microring resonator with 100 GHz free spectral range to achieve this *** the strategy of the tunable coupler,the dynamical and extensive tuning range of quality factors of the microring can be obtained,and then the biphoton pair generation rate can be *** selecting and characterizing 28 pairs from a more than 30-pair modes biphoton frequency comb,we obtain a Schmidt number of at least 23.4 and on-chip pair generation rate of 19.9 MHz/m W;under a low on-chip pump power,which corresponds to 547 dimensions Hilbert space in frequency *** results will prompt the wide applications of quantum frequency comb and boost the further large density and scalable on-chip quantum information processing.

关键词： silicon microring resonator quantum entanglement biphoton frequency comb

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有限幂零半群的构造

数学杂志 1989年第3期9卷 269-272页

作者：朱聘瑜青海师范大学

有零元的半群S称为幂零的,如果对于任意x∈S有正整数n使x^n=0,设S是有限幂零半群,则存在正整数门使得S^n={0}([1],P.81),适合此条件的最小正整数称为S的0-阶,记为0(S);S的非零元x的0-阶(记为o(x))是指适合下述条件的最小正整数n:S的任意... 详细信息

有零元的半群S称为幂零的,如果对于任意x∈S有正整数n使x^n=0,设S是有限幂零半群,则存在正整数门使得S^n={0}([1],P.81),适合此条件的最小正整数称为S的0-阶,记为0(S);S的非零元x的0-阶(记为o(x))是指适合下述条件的最小正整数n:S的任意n个包括x在內的元素的积为零;零元的o-阶规定为1. 以下假设S是n阶有限幂零半群.

关键词：有限幂零半群 b-满子集 A-分离

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被动隔振体的非线性振动分析

机械工程学报 2001年第6期37卷 99-101,105页

作者：陈安华刘德顺朱萍玉湘潭工学院振动冲击与诊断研究所湘潭411201 中南大学

研究了由地基振动激励的隔振体的非线性动力响应。用变形的三次多项式函数表征隔振材料的非线性刚度特征 ,建立了被动隔振体的非线性动力学方程 ,分别用谐波平衡法和直接数值积分法研究了其非线性动力响应特性 ,得出了频率响应方程和幅... 详细信息

研究了由地基振动激励的隔振体的非线性动力响应。用变形的三次多项式函数表征隔振材料的非线性刚度特征 ,建立了被动隔振体的非线性动力学方程 ,分别用谐波平衡法和直接数值积分法研究了其非线性动力响应特性 ,得出了频率响应方程和幅频曲线 ,揭示了忽略隔振材料刚度的非线性将会导致隔振设计和隔振效果分析的显著误差。分析方法和结论对于精确进行被动隔振设计和隔振效果评价具有积极意义。

关键词：隔振非线性响应谐波平衡法地基振动被动隔振体

基于分布式光纤传感技术的堤坝渗流模拟系统设计(英文)

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仪器仪表学报 2007年第3期28卷 431-436页

作者：朱萍玉 Luc Thévenaz 冷元宝周杨湖南科技大学机械设备健康维护湖南省重点实验室瑞士洛桑联邦理工学院纳米光子学和计量学实验室水利部堤防安全与病害防治工程技术研究中心

分析了堤坝渗流通过温度监测的可行性,提出了基于分布式光纤温度传感的堤坝渗流监测方法,设计了模拟装置;模拟监测系统由堤坝实体模型、渗流控制单元和光纤监测单元组成,采用传统的温湿度计和渗流量计对堤坝模型渗流实施单点监测,并与Di... 详细信息

分析了堤坝渗流通过温度监测的可行性,提出了基于分布式光纤温度传感的堤坝渗流监测方法,设计了模拟装置;模拟监测系统由堤坝实体模型、渗流控制单元和光纤监测单元组成,采用传统的温湿度计和渗流量计对堤坝模型渗流实施单点监测,并与DiTeSt分析仪的结果比较。堤坝渗流模拟装置可实现不同水温、不同浸润线、不同规格堤坝和堤坝渗流程度的重复模拟,给出了一种野外专用的传感光缆实验结果。研究中的试验结果有利于设计合理的光缆布设和探测方案,同时为堤坝安全监测的量化研究提供有效的手段和平台。

关键词：堤坝渗流模拟装置分布式光纤传感温度监测

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基于性能稳健偏差的区间型参数稳健设计优化

中国机械工程 2007年第8期18卷 952-957页

作者：刘德顺岳文辉朱萍玉杜小平湖南科技大学机械设备健康维护湖南省重点实验室湘潭411201 密苏里-罗拉大学

提出了基于系统性能稳健偏差的稳健设计优化方法。该方法针对区间型参数非梯度性能函数的稳健设计问题,应用性能稳健偏差概念评估目标性能函数和约束性能函数的稳健性,形成了三层次稳健设计优化模型:①搜索优化设计点;②迭代策略搜索设... 详细信息

提出了基于系统性能稳健偏差的稳健设计优化方法。该方法针对区间型参数非梯度性能函数的稳健设计问题,应用性能稳健偏差概念评估目标性能函数和约束性能函数的稳健性,形成了三层次稳健设计优化模型:①搜索优化设计点;②迭代策略搜索设计点的目标函数和约束函数的稳健偏差;③优化寻求给定性能偏差所对应的稳健性指数。该方法可获得同时满足约束条件和目标值稳健性要求的优化设计,并输出目标值及其稳健偏差。用三杆桁架结构稳健设计优化说明了该方法的用法和特点。

关键词：稳健设计稳健性能偏差最坏情况分析优化设计

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等透射率冲击部件的动态反演综合

机械工程学报 2001年第4期37卷 17-20页

作者：刘德顺朱萍玉彭佑多陈安华湘潭工学院振动冲击与诊断研究所湘潭411201

研究了应力波在冲击机械系统中的传播规律 ,提出了给定部件等透射率的部件综合方法。将给定部件离散成N个等时段 ,每段内的截面积一定 ,从而建立了描述应力波传播的矩阵方程。提出并讨论了部件特征矩阵和等透射率概念。借助反演技术 ,... 详细信息

研究了应力波在冲击机械系统中的传播规律 ,提出了给定部件等透射率的部件综合方法。将给定部件离散成N个等时段 ,每段内的截面积一定 ,从而建立了描述应力波传播的矩阵方程。提出并讨论了部件特征矩阵和等透射率概念。借助反演技术 ,通过替代求解出所有与给定部件透射率相等的部件设计方案 ,并论证了当离散数为N时部件设计方案数目最多为 2 N 个 ,其中包括给定部件本身。

关键词：透射率冲击部件应力波动态反演综合

The Liner Formulas between the Supporting Force and Axis Warp of Large-scale Rotary Kiln with Multi-support

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工程科学（英文版） 2007年第2期5卷 214-220页

作者： zhu pingyu, Shen Yiping, Li Ping, Li Xuejun(Health Maintenance for Mechanical Equipment Key Lab of Hunan Province, Hunan Science and Technology University, Xiangtan, Hunan, China 411201)

Kilns are the key equipment in the metallurgy,architectural and chemistry industry. It is the statically indeterminate system with over load, large torque and multi-support. The kiln move axis warp resulting in that the load distribution is asymmetry, cause many mechanical failure and safe accidents and the interruption of the produce, which bring a great losses. Treating the distribution of the kiln load and the complexity of the stiffness change, the all-purpose model and matrix, used to solve the variable-stiffness beam upon complex load, are established in this paper. The resultant force of kiln in vertical and horizontal direction is calculated. Accordingly, the liner formulas for calculating the supporting force of the support wheels are obtained, and the wheel supporting force also can be easily obtained based on each shell warp. This will provide theory conference for safety management and rational maintenance.

关键词： multi-support rotary kiln axis warp supporting force linear formula