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A von-Neumann-like photonic processor and its application in studying quantum signature of chaos

Light(Science & Applications) 2024年第4期13卷 672-681页

作者： Shang Yu Wei Liu Si-Jing Tao Zhi-Peng Li Yi-Tao Wang Zhi-Peng Zhong Raj BPatel Yu Meng Yuan-Ze Yang Zhao-An Wang Nai-Jie Guo Xiao-Dong Zeng Zhe Chen Liang Xu Ning Zhang Xiao Liu Mu Yang Wen-Hao Zhang Zong-Quan Zhou Jin-Shi Xu Jian-Shun Tang Yong-Jian Han 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. Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China. Research Center for Quantum Sensing Zhejiang LabHangzhou 310000China. Quantum Optics and Laser Science Blackett LaboratoryImperial College LondonPrince Consort RdLondon SW72AZUK. Clarendon Laboratory Department of PhysicsOxford UniversityParks Road OX13PUOxfordUK

Photonic quantum computation plays an important role and offers unique *** decades after the milestone work of Knill-Laflamme-Milburn,various architectures of photonic processors have been proposed,and quantum advantage over classical computers has also been *** is now the opportune time to apply this technology to real-world ***,at current technology level,this aim is restricted by either programmability in bulk optics or loss in integrated optics for the existing architectures of processors,for which the resource cost is also a *** we present a von-Neumann-like architecture based on temporal-mode encoding and looped structure on table,which is capable of multimode-universal programmability,resource-efficiency,phasestability and *** order to illustrate these merits,we execute two different programs with varying resource requirements on the same processor,to investigate quantum signature of chaos from two aspects:the signature behaviors exhibited in phase space(13 modes),and the Fermi golden rule which has not been experimentally studied in quantitative way before(26 modes).The maximal program contains an optical interferometer network with 1694 freely-adjustable *** current state-of-the-art,our architecture stands as the most promising candidate for real-world applications.

关键词： quantum signature chaos

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Tuning the ferroelectricity of Hf0.5Zr0.5O2 with alloy electrodes

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Science china(Information Sciences) 2024年第8期67卷 321-330页

作者： Keqin LIU Bingjie DANG Zhiyu YANG Teng ZHANG Zhen YANG Jinxuan BAI Zelun PAN Ru HUANG Yuchao YANG Beijing Advanced Innovation Center for Integrated Circuits School of Integrated Circuits Peking University School of Electronic and Computer Engineering Peking University Center for Brain Inspired Chips Institute for Artificial Intelligence Peking University Center for Brain Inspired Intelligence Chinese Institute for Brain ResearchBeijing

Tuning ferroelectricity of Hf0.5Zr0.5O2is crucial for facilitating its practical applications in various fields, including in-memory and neuromorphic computing. Previous studies have revealed that the electrodes have a significant influence on ferroelectricity, and changing electrode materials can realize different but discrete ferroelectric polarization values. Here, we introduce an alloy-electrode method, in order to achieve gradual and accurate modulation of ferroelectric polarization, especially useful for matching the polarization charges at the interface of ferroelectric insulators and ferroelectric semiconductors. Au and W electrodes are chosen as baselines for realizing weak and strong ferroelectric polarization, where the intermediate states can be achieved by adjusting the ratio of metals in the Au-W alloy. To demonstrate the generality of this approach, the Cu-W alloy electrode is also realized for tuning ferroelectric polarization. The effect of alloy electrodes on device leakage current, endurance, and retention is evaluated. In addition, the temperature stability of ferroelectric capacitors is tested, where limited changes in both remnant polarization and coercive voltages are observed, showing the great potential of the ferroelectric hafnium oxide. Such gradual modulation of ferroelectric polarization could facilitate the application of Hf0.5Zr0.5O2in in-memory and neuromorphic computing.

关键词： ferroelectric hafnium oxide alloy electrode gradual modulation temperature stability

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Photocatalytic applications and modification methods of two-dimensional nanomaterials:a review

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tungsten 2024年第1期6卷 77-113页

作者： Fan Yang Ping Hu Fan Yang Xing-Jiang Hua Bo Chen Lili Gao Kuai-She Wang School of Metallurgy Engineering Xi’an University of Architecture and TechnologyXi’an 710055China National and Local Joint Engineering Research Center for Functional Materials Processing Xi’an University of Architecture and TechnologyXi’an 710055China

Due to its unique electronic structure and special size effect,two-dimensional(2D)nanomaterials have shown great potential far beyond bulk materials in the field of *** to deeply explore the photocatalytic mechanism of 2D nanomaterials and design more efficient 2D semiconductor photocatalysts are research *** review provides a comprehensive introduction to typical 2D nanomaterials and discusses their current application status in the field of *** effects of material properties such as band structure,morphology,crystal face structure,crystal structure and surface defects on the photocatalytic process are *** main modification methods are highlighted,including doping,noble metal deposition,heterojunction,thickness adjustment,defect engineering,and dye sensitization in 2D material ***,the future development of 2D nanomaterials is *** is hoped that this paper can provide systematic and useful information for researchers engaged in the field of photocatalysis.

关键词： Photocatalysis Two-dimensional Nanomaterials Bandgap Modification strategy

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The effect of secondary phase on corrosion behaviors of the titanium–zirconium–molybdenum alloy

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tungsten 2024年第2期6卷 342-354页

作者： Song-Wei Ge Ping Hu Jie Deng Shi-Lei Li Hai-Rui Xing Jia-Yu Han Xing-Jiang Hua Li Wang Jun-Zhou Yang Bo Jin Wen Zhang Kuai-She Wang School of Metallurgy Engineering Xi’an University of Architecture and TechnologyXi’an 710055China National and Local Joint Engineering Research Center for Functional Materials Processing Xi’an University of Architecture and TechnologyXi’an 710055China Western Xinxing Rare and Precious Metals Co. Ltd.Shangluo 726000China Northwest Institute for Non-Ferrous Metal Research Xi’an 710016China

As the range of applications for molybdenum and its alloys has expanded,the corrosive environment for molybdenum alloys has become more *** the past,the content of doping elements has been studied to investigate their infl uence on the corrosion performance of titanium–zirconium–molybdenum(TZM)*** this paper,it is considered that the second phase in the alloy is the main factor aff ecting the corrosion performance of TZM *** comparing the corrosion behavior of molybdenum metal and TZM alloy,the eff ect of the secondary phase on corrosion behaviors of TZM alloy has been *** results show that the second phase reduces the corrosion resistance of the TZM *** potential of the second phase is 73.7 mV higher than that of the Mo matrix,which contributes to the formation of microscopic electric *** the action of microscopic electric couples,pitting corrosion is preferentially formed at the interface between the second phase and the matrix,which accelerates the corrosion of the *** paper provides a theoretical basis for the application of TZM alloys in corrosive environments.

关键词： Secondary phase Electrochemical corrosion Titanium–zirconium–molybdenum(TZM) Galvanic corrosion Corrosion resistance

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Recognition and chirality sensing of guanosine-containing nucleotides by an achiral tetraphenylethene-based octacationic cage in water

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Chinese Chemical Letters 2024年第1期35卷 267-270页

作者： Honghong Duan Ting Yang Qingfang Li Fan Cao Pingxia Wang Liping Cao College of Chemistry and Materials Science Northwest UniversityXi'an 710069China

The development of molecular probes or systems with the ability of multiple orthogonal responses is an effective approach to precisely detect biomolecules with similar chemical ***,we report the synthesis of a water-soluble TPE-based octacationic cage(1)with the compressed TPE-containing bilayer,which endows it with good fluorescence properties and potential conformation *** a result,1 exhibits molecular recognition for anionic nucleotides within its two“claw”-like cavities to form 1:2 host-guest complexes in water,companying with selective turn-off fluorescence and turn-on CD responses to G/GTP over other nucleotides.

关键词： Host-guest recognition Chirality sensing Tetraphenylethene Achiral cage Nucleotide

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Probing quantum causality with geometric asymmetry in spatial-temporal correlations

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Science china(Information Sciences) 2024年第9期67卷 294-305页

作者： Yu MENG Zheng-Hao LIU Zhikuan ZHAO Peng YIN Yi-Tao WANG Wei LIU Zhi-Peng LI Yuan-Ze YANG Zhao-An WANG Jin-Shi XU Shang YU Jian-Shun TANG Chuan-Feng LI Guang-Can GUO CAS Key Laboratory of Quantum Information University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Department of Computer Science Eidgen?ssische Technische Hochschule Zürich Hefei National Laboratory Department of Physics Imperial College London Research Center for Quantum Sensing Zhejiang Lab

Causation promotes the understanding of correlation to an advanced stage by elucidating its underlying mechanism. Although statisticians have specified the possible causal relations among correlations,inferring causal structures is impossible from only the observed correlations in the classical world. Quantum correlations encapsulating the most defining aspects of quantum physics have taken a new turn for the causal inference problem — the two-point spatial and temporal quantum correlations with observationally discernible characteristics correspond exactly to the two most basic causal structures. However, a direct causal interpretation for quantum correlations has only been established in very limited cases. Here, we explore to what extent quantum correlations promote causal inference. Theoretically, we have found that the distinguishable causal regime of two-point Pauli correlations can be expanded from a single value to an asymmetric interval, and the causal structures determining the quantum correlations can be interpreted by a simple distance criterion. Experimentally, we have devised and implemented a versatile non-unital quantum channel in an optical architecture to directly observe such an asymmetric interval. The setup enabled quantum causal inference without any requirement of active intervention, which is impossible in the classical realm. Our work facilitates the identification of causal links among quantum variables and provides insight into characterizing causation and spatial-temporal correlation in quantum mechanics.

关键词： causality quantum information quantum channel channel-state duality non-unital channel

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Experimental observation of multiple topological nodal structure in LaSb_(2)

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Science china(Physics,Mechanics & Astronomy) 2024年第4期67卷 138-145页

作者： Yuxi Qiao Fuyi Wang Huaiqiang Wang Zicheng Tao Zhicheng Jiang Zhengtai Liu Soohyun Cho Fayuan Zhang Qingkai Meng Wei Xia Yichen Yang Zhe Huang Jishan Liu Zhonghao Liu Zengwei Zhu Shan Qiao Yanfeng Guo Haijun Zhang Dawei Shen State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China National Synchrotron Radiation Laboratory and School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China School of Physics and Technology Nanjing Normal UniversityNanjing 210023China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Wuhan National High Magnetic Field Center and School of Physics Huazhong University of Science and TechnologyWuhan 430074China ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China Institute of High-Pressure Physics School of Physical Science and Technology Ningbo UniversityNingbo 315211China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Unconventional fermions in the immensely studied topological semimetals are the source for rich exotic topological ***,using symmetry analysis and first-principles calculations,we propose the coexistence of multiple topological nodal structure in LaSb_(2),including topological nodal surfaces,nodal lines and in particular eightfold degenerate nodal points,which have been scarcely observed in a single ***,utilizing angle-resolved photoemission spectroscopy,we confirm the existence of nodal surfaces and eightfold degenerate nodal points in LaSb_(2).The intriguing multiple topological nodal structure might play a crucial role in giving rise to the large linear *** work renews the insights into the exotic topological phenomena in LaSb_(2).

关键词： eightfold degenerate points multiple topological nodal structure angle-resolved photoemission spectroscopy linear unsaturated magnetoresistance

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羧基功能化金纳米团簇的仿生结晶及其近红外磷光性质

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Science Bulletin 2024年第1期69卷 40-48页

作者：田伟东司为丹 Shana Havenridge 张成凯王芝 Christine M.Aikens 佟振合孙頔 School of Chemistry and Chemical Engineering State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China Department of Chemistry Kansas State UniversityManhattan KS 66506USA

As an interdisciplinary product,water-soluble gold nanoclusters(AuNCs)stabilized by ligands containing carboxyl(-COOH)group have garnered significant attention from synthetic chemists and biologists due to their immense potential for biomedical ***,revealing the crystallographic structures of-COOH-functionalized AuNCs remains a ***,we successfully applied the salting-out method to obtain a series of high-quality single crystals of-COOH-functionalized Au_(25)nanoclusters and revealed their crystallographic ***,K_(3)Au_(25)(2-Hmna)_9(mna)_6]^(-)(Au25a)protected by 2-mercaptonicotinic acid features an unprecedented tetrameric Au_(4)(SR^(S))_(3)(SR^(S,N))_(2)staple motifs surrounding the icosahedral Au_(13)kernel,breaking the traditional perception on the structure of Au_(25)(SR)_(18).Au25a exhibits a distinct near-infrared emission at 970 nm with long lifetime of 8690 ns,which have been studied by transient absorption spectroscopy and time-dependent density functional *** work compensates for the research gap in the experimental structure of-COOHfunctionalized AuNCs and opens up a new avenue to explore their structure-property correlations.

关键词： Water-soluble gold nanoclusters Near-infrared phosphorescence Salting-out method

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基于天然水凝胶的三维乳腺癌肿瘤模型研究进展（英文）

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第9期 736-756页

作者：疏艳李冰马海林刘嘉琦郑婉怡李香琴刘天庆杨初蔚马骁宋克东大连理工大学大连干细胞与组织工程研发中心精细化学品国家重点实验室悉尼理工大学理学院生物医学材料和设备研究所大连医科大学附属第二医院急诊中心大连医科大学第一附属医院麻醉科

乳腺癌是女性最常见的癌症，同时也是世界范围内致死率最高的癌症之一。根据肿瘤组织的分布部位，乳腺癌可分为浸润性乳腺癌和非浸润性乳腺癌。浸润性乳腺癌中的癌细胞通过免疫系统或体循环穿过乳房到达身体的不同部位，形成转移性乳腺... 详细信息

乳腺癌是女性最常见的癌症，同时也是世界范围内致死率最高的癌症之一。根据肿瘤组织的分布部位，乳腺癌可分为浸润性乳腺癌和非浸润性乳腺癌。浸润性乳腺癌中的癌细胞通过免疫系统或体循环穿过乳房到达身体的不同部位，形成转移性乳腺癌（耐药性和远处转移是乳腺癌致死的最主要原因），因此针对乳腺癌的研究受到了研究人员的广泛关注。通过组织工程方法体外构建的肿瘤模型是研究癌症机制和筛选抗癌药物的常用工具。肿瘤微环境由癌细胞和各种类型的基质细胞组成，包括成纤维细胞、内皮细胞、间充质细胞和嵌入在细胞外基质中的免疫细胞。细胞外基质含有纤维蛋白（例如Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅵ和Ⅹ型胶原和弹性蛋白）和糖蛋白（例如蛋白聚糖、纤连蛋白和层粘连蛋白）等成分，两者均参与了细胞信号传导和生长因子的结合。目前传统的二维（2D）肿瘤模型因受生长环境限制，往往不能准确再现体内肿瘤组织的异质性和复杂性。因此，近年来，对三维（3D）肿瘤模型的研究逐渐增多，尤其是高精度、高重复性的3D生物打印模型。与2D模型相比，3D环境可以更好地模拟肿瘤微环境中复杂的细胞外基质成分和结构，因此常被用作2D细胞水平实验和动物实验之间的桥梁。此外，脱细胞基质、明胶和海藻酸钠等天然材料因其优异的生物相容性和无免疫排斥性而被广泛用于肿瘤模型的构建。本文综述了组织工程3D肿瘤模型中涉及到的各种天然支架材料及构建方法，以期为乳腺癌领域的研究提供参考。

关键词：乳腺癌肿瘤微环境 3D肿瘤模型脱细胞基质天然支架材料

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Dissipative Particle Dynamics Simulations of Domain Growth and Phase Separation in Binary Immiscible Fluids

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Chinese Journal of Chemical Physics 2008年第5期21卷 451-456页

作者： ying Zhao Hong Liu Zhong-yuan Lu Chia-chung Sun State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical ChemistryJilin University Changchun 130023 China

It was investigated that the domain growth processes of spinodal decomposition with different quenching depth in two and three dimensional binary immiscible fluids by using parallel dissipative particle dynamics simulations. In two dimensions, the dynamic scaling exponent 1/2 for coalescence and 2/3 for inertial regimes in the shallow quench and strong finite size effects in the cases of deep quenching were obtained. In three dimensions, it was used that the diffusive regime with exponent n=l/3 in the shallow quench and the inertial hydrodynamic regime with n=2/3 for different quenches. The viscous effects are not clearly reflected, showing n=1/2 in both shallow and deep quenches in this time period, due to the soft nature of interaction potential adopted in dissipative particle dynamics.

关键词： Dissipative particle dynamics Binary immiscible fluids Domain growth

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