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Fast topological pumping for the generation of large-scale Greenberger–Horne–Zeilinger states in a superconducting circuit

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Frontiers of physics 2022年第6期17卷 143-161页

作者： Jin-Xuan Han Jin-Lei Wu Zhong-Hui Yuan Yan Xia Yong-Yuan Jiang Jie Song School of Physics Harbin Institute of TechnologyHarbin 150001China Department of Optoelectronics Science Harbin Institute of TechnologyWeihai 264209China Department of Physics Fuzhou UniversityFuzhou 350002China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Key Laboratory of Micro-Nano Optoelectronic Information System Ministry of Industry and Information TechnologyHarbin 150001China Key Laboratory of Micro-Optics and Photonic Technology of Heilongjiang Province Harbin Institute of TechnologyHarbin 150001China

Topological pumping of edge states in the finite lattice with nontrivial topological phases provides a powerful means for robust excitation transfer,requiring extremely slow evolution to follow an adiabatic ***,we propose fast topological pumping via edge channels to generate large-scale Greenberger–Horne–Zeilinger(GHZ)states in a topological superconducting circuit with a sped-up evolution *** scheme indicates a conceptual way of designing fast topological pumping related to the instantaneous energy spectrum characteristics rather than relying on the shortcuts to *** on fast topological pumping,large-scale GHZ states show greater robustness against on-site potential defects,the fluctuation of couplings and losses of the system in comparison with the conventional adiabatic topological *** experimentally feasible qutrit-resonator coupling strengths and moderate decay rates of qutrits and resonators,fast topological pumping drastically improves the scalability of GHZ states with a high *** work opens up prospects for the realization of large-scale GHZ states based on fast topological pumping in the superconducting quantum circuit system,which provides potential applications of topological matters in quantum information processing.

关键词： topological pumping superconducting ciruit large-scale Greenberger-Horne-Zeilinger states

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A-VMD: Adaptive Variational Mode Decomposition Scheme for Noise Reduction in Sensor-Cloud 2nd

A-VMD: Adaptive Variational Mode Decomposition Scheme for No...

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2nd International Conference on Ubiquitous Security, UbiSec 2022

作者： Huo, Zhenru Jia, Guoqing Fang, Weidong Chen, Wei Zhang, Wuxiong School of Physics and Electronic Information Engineering Qinghai Minzu University Xining810007 China Science and Technology On Micro-System Laboratory Shanghai Institute of Micro-System and Information Technology Chinese Academy of Sciences Shanghai201899 China University of Chinese Academy of Sciences Beijing100049 China Shanghai Research and Development Center for Micro-Nano Electronics Shanghai201210 China School of Mechanical Electronic and Information Engineering China University of Mining and Technology-Beijing Beijing100083 China School of Computer Science and Technology China University of Mining and Technology Xuzhou221116 China

ISBN: (纸本)9789819902712

Digital signal processing is critical during the use of sensor-clouds, and the data information acquired by sensors is inevitably noisy. The Variational Mode Decomposition (VMD) algorithm can be used to reduce noise on the signal. The selection of the modal decomposition number of the VMD algorithm and the selection of the modal components of the reconstructed signal affect the effect of signal noise reduction. In this paper, an adaptive variational mode decomposition scheme is proposed. It adaptively selects the modal decomposition number through the established modal decomposition number and the input signal sample entropy model, selects the optimal modal component according to the sample entropy threshold, and reconstructs the signal after the selected modal component is processed by data smoothing. The results show that compared with traditional variational mode decomposition, empirical mode decomposition algorithms, and other algorithms, the effect of adaptive variational mode decomposition in filtering out signal noise is analyzed. The proposed adaptive VMD (A-VMD) algorithm can effectively filter out the noise of the signal obtained by the sensor. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Variational mode decomposition

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Pt thin-film resistance thermo detectors with stable interfaces for potential integration in SiC hightemperature pressure sensors

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microsystems & Nanoengineering 2024年第5期10卷 231-242页

作者： Ziyan Fang Xiaoyu Wu Hu Zhao Xudong Fang Chen Wu Dong Zhang Zhongkai Zhang Bian Tian Libo Zhao Tiefu Li Prateek Verma Ryutaro Maeda Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXi'an Jiaotong UniversityXi'an 710049China School of Mechanical Engineering Xi'an Jiaotong UniversityXi'an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing at Yantai Yantai 264000China Xi'an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and System Xi'anChina School of Instrument Science and Technology Xi'an Jiaotong UniversityXi'an 710049China School of Integrated Circuits Tsinghua UniversityBeijing 100084China Department of Chemical Engineering University of ArkansasFayettevilleAR72701USA

Due to the excellent mechanical,chemical,and electrical properties of third-generation semiconductor silicon carbide(SiC),pressure sensors utilizing this material might be able to operate in extreme environments with temperatures exceeding 300℃.However,the significant output drift at elevated temperatures challenges the precision and stability of ***-time in situ temperature monitoring of the pressure sensor chip is highly important for the accurate compensation of the pressure *** this study,we fabricate platinum(Pt)thin-film resistance temperature detectors(RTDs)on a SiC substrate by incorporating aluminum oxide(Al_(2)O_(3))as the transition layer and utilizing aluminum nitride(AIN)grooves for alignment through microfabrication *** composite layers strongly adhere to the substrate at temperatures reaching 950℃,and the interface of the Al2O3/Pt bilayer remains stable at elevated temperatures of approximately 950 *** stability contributes to the excellent high-temperature electrical performance of the Pt RTD,enabling it to endure temperatures exceeding 850℃ with good *** characteristics establish a basis for the future integration of Pt RTD in SiC pressure ***,tests and analyses are conducted on the interfacial diffusion,surface morphological,microstructural,and electrical properties of the Pt flms at various annealing *** can be inferred that the tensile stress and self-diffusion of Pt films lead to the formation of hillocks,ultimately reducing the electrical performance of the Pt thin-flm *** increase the upper temperature threshold,steps should be taken to prevent the agglomeration of Pt films.

关键词： resistance carbide film

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Graphene-based dual-function acoustic transducers for machine learning-assisted human-robot interfaces

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InfoMat 2023年第2期5卷 66-79页

作者： Hao Sun Xin Gao Liang-Yan Guo Lu-Qi Tao Zi Hao Guo Yangshi Shao Tianrui Cui Yi Yang Xiong Pu Tian-Ling Ren Institute of Microelectronics and Beijing National Research Center for Information Science and Technology(BNRist) Tsinghua UniversityBeijingPeople's Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingPeople's Republic of China State Key Laboratory of Power Transmission Equipment and System Security and New Technology School of Electrical EngineeringChongqing UniversityChongqingPeople's Republic of China School of Computer Science&Technology Beijing Institute of TechnologyBeijingPeople's Republic of China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijingPeople's Republic of China

Human–robot interface(HRI)electronics are critical for realizing robotic ***,we report graphene-based dual-function acoustic transducers for machine learning-assisted human–robot interfaces(GHRI).The GHRI functions both an artificial ear through the triboelectric acoustic sensing mechanism and an artificial mouth through the thermoacoustic sound emission *** success of the integrated device is also attributed to the multifunctional laser-induced graphene,as either triboelectric materials,electrodes,or thermoacoustic *** systematically optimizing the structure parameters,the GHRI achieves high sensitivity(4500 mV Pa^(–1))and operating durability(1000000 cycles and 60 days),capable of recognizing speech identities,emotions,content,and other information in the human *** the assistance of machine learning,30 speech categories are trained by a convolutional neural network,and the accuracy reaches 99.66%and 96.63%in training datasets and test ***,GHRI is used for artificial intelligence communication based on recognized speech *** work shows broad prospects for the development of robotic intelligence.

关键词： human-robot interface laser-induced graphene machine learning thermoacoustic triboelectric nanogenerator

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High-Speed Transcendental Function Operation Unit Design 9

High-Speed Transcendental Function Operation Unit Design

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9th IEEE International Conference on Cyber Security and Cloud Computing and 8th IEEE International Conference on Edge Computing and Scalable Cloud, CSCloud-EdgeCom 2022

作者： Ze, Tian Feihu, Fan Jun, Zhang Xianglong, Ren Yang, Wei Xi'an XiangTeng Micro-Electronic Technology Co. Ltd Xi'an710068 China Key Laboratory of Aviation Science and Technology on Integrated Circuit and Micro-System Desigen Xi'an710068 China Northeastern Polytechnic University School of Computer Science Xi'an China

ISBN: (数字)9781665480666

ISBN: (纸本)9781665480666

With the rapid popularization and rapid development of embedded devices such as mobile terminals, people have become increasingly demanding for high-resolution picture rendering effects and fast computing capabilities of various processors. The enhancement of these capabilities of the processor depends on the computer's floating-point computing capabilities, which makes people to the GPU's rendering quality and speed, mobile devices, digital signal processing (DSP), and other computing units' floating-point computing capabilities Higher requirements have been raised [1]. The transcendental function arithmetic unit based on single-precision floating-point numbers is a very important component in these devices. For example, the perspective division, vector normalization, and coordinate transformation required in the GPU all require transcendental function operations [2] (For example, find the inverse, square root, trigonometric function, exponent, logarithm, etc.). In addition to the algebraic operations implemented in the field of mathematics, it is difficult to directly use a computer to calculate some complex functions. It can only complete complex functions through a limited number of simple operations, but for transcendental functions, in other words, the relationship between their input variables and output variables cannot be expressed by a finite number of basic operations such as addition, subtraction, multiplication, division, and power. Therefore, in a computer, the operation of a transcendental function cannot be directly implemented using a limited number of basic function operation units. A special operation unit is required to complete the operation of the transcendental function. © 2022 IEEE.

关键词： Polynomial approximation

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Design of Shared Register File of GPU Unified Shader Array 9

Design of Shared Register File of GPU Unified Shader Array

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9th IEEE International Conference on Cyber Security and Cloud Computing and 8th IEEE International Conference on Edge Computing and Scalable Cloud, CSCloud-EdgeCom 2022

作者： Ze, Tian Xianglong, Ren Jun, Zhang Feihu, Fan Yue, Chen Xi'an XiangTeng Micro-Electronic Technology Co. Ltd Xi'an710068 China Key Laboratory of Aviation Science and Technology on Integrated Circuit and Micro-System Desigen Xi'an710068 China Northeastern Polytechnic University School of Computer Science Xi'an China

ISBN: (数字)9781665480666

ISBN: (纸本)9781665480666

Unified Shader Array is the computation core of the Unified Shader Array GPU, and the shader cores are the basic shader unit. In order to support the large-scale and thread-level parallelism of GPU, a large number of streaming processors composed of shader cores are set in GPU. The streaming processors can enable GPU to implement thread-level parallelism in the way of SIMD or SIMT. At the same time, GPU deploys large-scale register files for the streaming processor to reduce the cost of context switching, so the management of register files is of great significance to GPU performance. In the traditional GPU, each shader core has a unique register file, which simplifies the hardware management of the register. However, it will cause the limitation of the shader core's scale and insufficient register utilization. Based on the domestic special GPU, this paper analyzes the traditional GPU register scheduling strategy and carries out the design of the unified shader array shared register file based on pure hardware to reduce the cost of shader cores. This paper introduces its implementation in detail, including dynamic allocation and collection management of register files, allocation of multiple registers for thread bundles, detecting and handling of bank conflicts, and related register allocation and release collection instructions. Finally, we complete the RTL code implementation and analyze the experimental results. The results show that the design of this paper has reached the expected design goals in terms of simulation and logic synthesis. © 2022 IEEE.

关键词： Graphics processing unit

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Multifunction integration within magnetic CNT-bridged MXene/CoNi based phase change materials

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escience 2024年第6期4卷 108-117页

作者： Yan Gao Xiao Chen Xu Jin Chenjun Zhang Xi Zhang Xiaodan Liu Yinhui Li Yang Li Jinjie Lin Hongyi Gao Ge Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China School of Physics and Astronomy Beijing Normal UniversityBeijing 100875China Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China Micro-Nano System Research Center College of Information and Optical EngineeringTaiyuan University of TechnologyTaiyuanShanxi 030024China Shunde Graduate School University of Science and Technology BeijingShunde 528399China

Developing advanced nanocomposite phase change materials(PCMs)integrating zero-energy thermal management,microwave absorption,photothermal therapy and electrical signal detection can promote the leapfrog development of flexible wearable electronic *** this goal,we propose a multidimensional collaborative strategy combining two-dimensional(2D)MXene nanosheets with metal-organic framework-derived onedimensional(1D)carbon nanotubes(CNTs)and zero-dimensional(0D)metal *** encapsulating paraffin wax(PW)in three-dimensional(3D)networked multidimensional MXene/CoNi-C,the resulting composite PCMs exhibit excellent thermal energy storage capacity and long-term thermally reliable *** from the synergistically enhanced photothermal effects of CNTs,Co/Ni nanoparticles and MXene,PW@MXene/CoNi-C can capture photons efficiently and transfer phonons quickly,yielding an ultrahigh photothermal conversion and storage efficiency of 97.5%.Additionally,PW@MXene/CoNi-C composite PCMs exhibit high microwave absorption with a minimum reflection loss of -49.3 dB at 8.03 GHz in heat-related electronic application *** attractively,the corresponding flexible phase change film can simultaneously achieve thermal management and electromagnetic shielding of electronic devices,as well as photothermal therapy and electrical signal detection for *** functional integration design provides an important reference for developing advanced flexible multifunctional wearable materials and devices.

关键词： Phase change materials Metal-organic frameworks Two-dimensional MXene Photothermal conversion Thermal energy storage microwave absorption

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Nanoscale phase management of the 2D/3D heterostructure toward efficient perovskite solar cells

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science Bulletin 2024年第18期69卷 2853-2861页

作者： Hao Gu Annan Zhu Junmin Xia Wang Li Jiahao Zheng Tao Yang Shengwen Li Nan Zhang Shiliang Mei Yongqing Cai Shi Chen Chao Liang Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao 999078China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an 710049China Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China

The stabilization of the formamidinium lead iodide(FAPbI_(3))structure is pivotal for the development of efficient photovoltaic *** two-dimensional(2D)layers to passivate the threedimensional(3D)perovskite is essential for maintaining the a-phase of FAPbI_(3) and enhancing the power conversion efficiency(PCE)of perovskite solar cells(PSCs).However,the role of bulky ligands in the phase management of 2D perovskites,crucial for the stabilization of FAPbI_(3),has not yet been *** this study,we synthesized nanoscale 2D perovskite capping crusts with=1 and 2 Ruddlesden-Popper(RP)perovskite layers,respectively,which form a type-Ⅱ 2D/3D *** heterostructure stabilizes the a-phase of FAPbI_(3),and facilitates ultrafast carrier extraction from the 3D perovskite network to transport contact *** introduced tri-fluorinated ligands to mitigate defects caused by the halide vacancies and uncoordinated Pb^(2+)ions,thereby reducing nonradiative carrier recombination and extending carrier *** films produced were incorporated into PSCs that not only achieved a PCE of 25.39%but also maintained 95%of their initial efficiency after 2000 h of continuous light exposure without *** findings underscore the effectiveness of a phase-pure 2D/3D heterostructure-terminated film in inhibiting phase transitions passivating the iodide anion vacancy defects,facilitating the charge carrier extraction,and boosting the performance of optoelectronic devices.

关键词： Phase-pure 2D perovskite 2D/3D heterostructure Type-II energy alignment Carrier dynamic FAPbI_(3)

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Fast energy transfer in an acoustic multicavity coupler based on the Su-Schrieffer-Heeger topological model

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Physical Review Applied 2024年第4期22卷 044009页

作者： Jiabao Yao Shuai Tang Cheng Lü Jianing Zhang Jie Song Yongyuan Jiang School of Physics School of Information Science and Engineering Harbin Institute of Technology Weihai 264209 Shandong China Collaborative Innovation Center of Extreme Optics Key Laboratory of Micro-Optics and Photonic Technology of Heilongjiang Province Harbin 150001 China Key Laboratory of Micro-Nano Optoelectronic Information System Ministry of Industry and Information Technology Harbin 150001 China

In this work, a compact acoustic coupler based on the Su-Schrieffer-Heeger topological model is presented. The coupler is composed of a cavity array and a series of slits, and the driving pulses in the system are achieved by modulating the width of the slits. The propagation process of acoustic energy is greatly accelerated by selecting and optimizing the driving pulses within a compact configuration. An optimized protocol is adopted to drive the system and the coupler is greatly shortened to 0.3 m. Stable and asymmetric energy transfer is realized from the initial cavity to the end cavity via adiabatic state evolution. Benefitting from the topological protection exhibited by the energy band gap in the proposed multicavity coupler, the energy transfer remains robust after accelerating operation, which is verified experimentally. More uniquely, the coupler has application potential in unidirectional or nonreciprocal energy transfer when a certain loss or spatiotemporal modulation are introduced into the coupler, guaranteeing the security of signal exchange.

关键词： Topological effects in acoustic systems Acoustic metamaterials Coupled oscillators Metasurfaces Topological insulators Transducers Cavity resonators Su-Schrieffer-Heeger model

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A Noise Filter for Dynamic Vision Sensor Based on Spatiotemporal Correlation and Hot Pixel Detection

A Noise Filter for Dynamic Vision Sensor Based on Spatiotemp...

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International Conference on Autonomous Unmanned systems, ICAUS 2021

作者： Xu, Ninghui Zhao, Jiajia Ren, Yuan Wang, Lihui Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education School of Instrument Science and Engineering Southeast University Nanjing210096 China Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory Beijing100074 China

ISBN: (纸本)9789811694912

As a new type of neuromorphic sensor, the events-driven Dynamic Vision Sensor (DVS) has the advantages of low latency and wide dynamic range. The development of DVS overcomes the application limitations of traditional cameras in the field of high speed robots and autonomous driving. However, there are abundant unwanted noise events contained in the output of DVS, which severely affects the subsequent data-processing. To tackle the problem, a novel noise filter for DVS is proposed in this paper. Firstly, since the noise is composed of hot pixel events with high-frequency and random background activities, a time window is constructed to continuously detect hot pixels. Secondly, a spatiotemporal correlation-based denoising approach for each incoming event is conducted, while excluding its surrounding hot pixels, to avoid the negative effect caused by their high temporal correlation on the filter. Finally, the hot pixels are compensated with the events that are most probably to occur depending on the adjacent events, to achieve the completeness and precision of the output event stream. Experiments in different scenes demonstrate that the proposed noise filter can effectively eliminate the noise from the event stream of DVS and obviously outperforms the baseline method. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Pixels

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