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Beating the Fault-Tolerance Bound and Security Loopholes for Byzantine Agreement with a Quantum Solution

Research 2024年第3期2023卷 445-455页

作者： Chen-Xun Weng Rui-Qi Gao Yu Bao Bing-Hong Li Wen-Bo Liu Yuan-Mei Xie Yu-Shuo Lu Hua-Lei Yin Zeng-Bing Chen National Laboratory of Solid State Microstructures and School of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education)Renmin University of ChinaBeijing 100872China.

Byzantine agreement,the underlying core of blockchain,aims to make every node in a decentralized network reach *** Byzantine agreements unavoidably face two major *** is 1/3 fault-tolerance bound,which means that the system to tolerate f malicious players requires at least 3f+1 *** other is the security loopholes from its classical cryptography ***,we propose a Byzantine agreement framework with unconditional security to break this bound with nearly 1/2 fault tolerance due to multiparty correlation provided by quantum digital *** is intriguing that quantum entanglement is not necessary to break the 1/3 fault-tolerance bound,and we show that weaker correlation,such as asymmetric relationship of quantum digital signature,can also *** work strictly obeys two Byzantine conditions and can be extended to any number of players without requirements for multiparticle *** experimentally demonstrate three-party and five-party consensus for a digital *** work indicates the quantum advantage in terms of consensus problems and suggests an important avenue for quantum blockchain and quantum consensus networks.

关键词： methods quantum signature

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Coercivity mechanism of high-performance anisotropic heterostructure SmCo_(5)magnets

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Journal of Rare Earths 2024年第10期42卷 1882-1888页

作者： Yuan Teng Yuqing Li Weiqiang Liu Xiaochang Xu Zhanjia Wang Jianjun Yang Dongtao Zhang Hongguo Zhang Qingmei Lu Qiong Wu Weixing Xia Ming Yue Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing100124China School of Mechanical and Electrical Engineering Henan Institute of Science and TechnologyXinxiang453000China School of Mechanical Engineering Anyang Institute of TechnologyAnyang455000China Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo315201China

Due to its large magnetocrystalline anisotropy field and high Curie temperature,SmCo-based magnets are irreplaceable in high-temperature applications,The hot-deformed SmCo-based magnets are especially attractive for their excellent corrosion resistance,making them more suitable for harsh ***,it is still challenging for hot-deformed SmCo-based magnets to obtain high magnetization and high coercivity ***,it is necessary to analyze the relationship between its microstructure and magnetic properties and explore its magnetic hardening mechanism to guide the further improvement of magnetic *** this paper,the anisotropic heterostructure SmCo_(5)magnet was prepared by combining large height-reduction and introducing a nano-grained Smrich *** c-axis texture,(BH)m of 16.1 MGOe,and H_(ci)of 9.6 kOe were obtained via the heterostructure with SmCo_(5)micron-grain and Sm-rich nano-scale *** magnetic domain observation and technical magnetization analysis demonstrate that the coe rcivity mechanism is dominated by *** results also show that the smooth and Sm-rich precipitated grain boundary provides weak pinning *** provides a reference for the development of high-pe rformance nanocrystalline SmCo_(5)magnets.

关键词： Permanent magnet Heterostructure Rare earths Coercivity mechanism Hot-deformed SmCo magnet

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Electronic band structures of topological kagome materials

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Chinese Physics B 2025年第1期34卷 29-44页

作者： Man Li Huan Ma Rui Lou Shancai Wang School of Information Network Security People’s Public Security University of ChinaBeijing 100038China Department of Physics Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education)and Beijing Key Laboratory of Opto-electronic Functional Materials&Micronano DevicesRenmin University of ChinaBeijing 100872China Leibniz Institute for Solid State and Materials Research IFW Dresden01069 DresdenGermany Helmholtz-Zentrum Berlin fur Materialien und Energie Albert-Einstein-Strabe 1512489 BerlinGermany Joint Laboratory“Functional Quantum Materials”at BESSY II 12489 BerlinGermany

The kagome lattice has garnered significant attention due to its ability to host quantum spin Fermi liquid ***,the combination of unique lattice geometry,electron–electron correlations,and adjustable magnetism in solid kagome materials has led to the discovery of numerous fascinating quantum *** include unconventional superconductivity,charge and spin density waves(CDW/SDW),pair density waves(PDW),and Chern insulator *** emergent states are closely associated with the distinctive characteristics of the kagome lattice's electronic structure,such as van Hove singularities,Dirac fermions,and flat bands,which can exhibit exotic quasi-particle excitations under different symmetries and magnetic ***,various quantum kagome materials have been developed,typically consisting of kagome layers stacked along the z-axis with atoms either filling the geometric centers of the kagome lattice or embedded between the *** this topical review,we begin by introducing the fundamental properties of several kagome *** gain an in-depth understanding of the relationship between topology and correlation,we then discuss the complex phenomena observed in these *** include the simplest kagome metal T_(3)X,kagome intercalation metal T X,and the ternary compounds AT_(6)X_(6)and RT_(3)X_(5)(A=Li,Mg,Ca,or rare earth;T=V,Cr,Mn,Fe,Co,Ni;X=Sn,Ge;R=K,Rb,Cs).Finally,we provide a perspective on future experimental work in this field.

关键词： kagome lattice quasi-particle excitation electronic correlation magnetism

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High Mechanical Properties of Nickel-Based Superalloy with Dispersed Nanoparticles Formed by Laser Metal Deposition 6th

High Mechanical Properties of Nickel-Based Superalloy with D...

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6th China Aeronautical Science and Technology Conference, CASTC 2023

作者： Guo, Jiachen Sun, Yong Wang, Yudeng Ding, Chang Feng, Bo Wang, Jiafu Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Air Force Engineering University Shaanxi Xi’an710051 China

ISBN: (纸本)9789819988600

While laser-printed metals do not tend to match the mechanical properties and thermal stability of conventionally-processed metals, incorporating and dispersing nanoparticles in them should enhance their performance. However, this remains difficult to do during laser additive manufacturing. Here, we show that Nickel-based superalloy reinforced by nanoparticles can be deposited via laser melting of nanocomposite powders. Laser deposited nanocomposite materials have high hardness, high Young’s modulus and excellent ultimate tensile strength performance in almost all laser printed Nickel-base superalloy. The improved performance is attributed to a high density of well-dispersed nanoparticles, strong interfacial bonding between nanoparticles and matrix, ultrafine grain sizes and dislocation regulation enhancement mechanism. © 2024, Chinese Society of Aeronautics and Astronautics.

关键词： 3D printing

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Anisotropic Plasmon Resonance Enables Spatially Controlled Photothermal and Photochemical Effects in Hot Carrier-Driven Catalysis

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Chinese Journal of Chemistry 2024年第16期42卷 1877-1885页

作者： Jiaqi Wang Zhijie Zhu Kai Feng Shuang Liu Yuxuan Zhou Ifra Urooj Jiari He Zhiyi Wu Jiahui Shen Xu Hu Zhijie Chen Xudong Dong Manzar Sohail Yanyun Ma Jinxing Chen Chaoran Li Xingda An Le He Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhouJiangsu 215123China Jiangsu Key Laboratory ofAdvanced Negative Carbon Technologies Soochow UniversitySuzhouJiangsu 215123China Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Soochow UniversitySuzhouJiangsu 215123China Department of Chemistry School of Natural SciencesNational University of Sciences and TechnologyIslamabad 44000Pakistan

Localized surface plasmon resonance has been demonstrated to provide effective photophysical enhancement mechanisms in plasmonic ***,it remains highly challenging for distinct mechanisms to function in synergy for a collective gain in catalysis due to the lack of spatiotemporal control of their ***,the anisotropic plasmon resonance nature of Au nanorods was exploited to achieve distinct functionality towards synergistic *** and photochemical effects were enabled by the longitudinal and transverse plasmon resonance modes,respectively,and were enhanced by partial coating of silica nanoshells and epitaxial growth of a reactor *** excitation leads to a synergistic gain in photothermal-mediated hot carrier-driven hydrogen evolution *** approach provides important design principles for plasmonic photocatalysts in achieving spatiotemporal modulation of distinct photophysical enhancement *** also effectively broadens the sunlight response range and increases the efficacy of distinct plasmonic enhancement pathways towards solar energy harvesting and conversion.

关键词： Plasmon resonance Photothermal effect Photochemistry Photocatalysis Metal nanoparticles Charge carrier injection Heterogeneous catalysis Photoelectrochemistry

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Coupling boron-modulated bimetallic oxyhydroxide with photosensitive polymer enable highly-active and ultra-stable seawater splitting

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Journal of Energy Chemistry 2022年第12期75卷 26-37,I0002页

作者： Weiju Hao Chengyu Fu Yingming Wang Kui Yin Hongyuan Yang Ruotao Yang Ziliang Chen Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123JiangsuChina Departmentof Chemistry School of Materials and ChemistryUniversity of Shanghai for Science and TechnologyShanghai 200093China Department of Chemistry Metalorganics and Inorganic MaterialsTechnische Universität BerlinBerlin 10623Germany

Seawater photoelectrolysis is showing huge potential in green energy conversion field,yet it is still a formidable challenge to develop one catalyst that can drive the electrolysis reaction stably,economically and *** by this point,the inorganic–organic hybridization strategy is proposed to insitu construct one hierarchical electrode via concurrent electroless plating and polymerization,which assures the growth of boron-modulated nickel–cobalt oxyhydroxide nanoballs and photosensitive polyaniline nanochains on the self-supporting Ti-based foil(B-Co Ni OOH/PANI@TiO_(2)/Ti).Upon inducing photoelectric effect(PEE),the designed target electrode delivers overpotentials as low as 196 and 398 mV at 100 mA cm^(-2)for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),respectively,corresponding to an activity enhancement by about 15%as compared to those without ***,when served as bifunctional electrocatalysts for overall seawater electrolysis,it can stably maintain at 200 mA cm^(-2)with negligible decay over 72 *** analysis reveals that the exceptional catalytic performance can be credit to the B-CoNiOOH,polyaniline(PANI)and TiO_(2)subunit coupling-induced physically and chemically synergistic catalysis effect such as admirable composition stability,photoelectric function and adhesion *** finding in this contribution may trigger much more broad interest to the novel hybrid catalysts consisting of photosensitive polymer and transition metal-based electrocatalysts.

关键词： Photosensitive polymer B-modulated nanohybrid Electroless plating Photoelectric effect Seawater splitting

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Multiscale structural engineering of carbon nitride for enhanced photocatalytic H2O2 production

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Nano Research 2023年第4期16卷 4524-4530页

作者： Qing He Bounxome Viengkeo Xuan Zhao Zhengyuan Qin Jie Zhang Xiaohan Yu Yongpan Hu Wei Huang Yanguang Li Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China National Laboratory of Solid State Microstructures School of Physicsand Collaborative Innovation Center for Advanced MicrostructuresNanjing UniversityNanjing 210093China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyMacao 999078China

Carbon nitride(C_(3)N_(4))holds great promise for photocatalytic H_(2)O_(2)production from oxygen *** spite of great research efforts,they still suffer from low catalytic efficiency primarily limited by the fast recombination of photogenerated charge *** this work,we report the multiscale structural engineering of C_(3)N_(4)to significantly improve its optoelectronic properties and consequently photocatalytic *** product consists of porous spheres with high surface areas,abundant nitrogen defects,and alkali metal *** visible light irradiation,our catalyst shows a remarkable H_(2)O_(2)production rate of 3,080μmol·g^(−1)·h^(−1),which is more than 10 times higher than that of bulk C_(3)N_(4)and exceeds those of most other C_(3)N_(4)-based ***,the catalyst exhibits great stability,and can continuously work for 15 h without obvious activity decay under visible light irradiation,eventually giving rise to a high H_(2)O_(2)concentration of ca.45 mM.

关键词： photocatalytic H_(2)O_(2)production oxygen reduction carbon nitride multiscale structural engineering

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FeF_(x) and Fe_(2)ZrO_(5) Co-modified hematite for highly efficient solar water splitting

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Journal of Energy Chemistry 2022年第6期31卷 414-420,I0012页

作者： Xiaoquan Zhao Cheng Lu Shuo Li Yufeng Chen Gaoteng Zhang Duo Zhang Kun Feng Jun Zhong Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123JiangsuChina State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123JiangsuChina

Hematite is an excellent catalyst for photoelectrochemical (PEC) water splitting but its performance has been highly limited by poor conductivity and high charge *** by a Zr-based treatment to create bulk Fe_(2)ZrO_(5) in hematite and a F-based treatment to form an ultrathin surface FeF_(x) layer,the charge transfer can be highly improved and the charge recombination can be significantly *** a result,the FeF_(x) /Zr-Fe_(2)O_(3) photoanode presents an enhanced PEC performance with a photocurrent density of 2.43 m A/cm^(2)at 1.23 V ***,which is around 3 times higher than that of the pristine Fe_(2)O_(3) .The FeF_(x) /Zr-Fe_(2)O_(3) photoanode also shows a low onset potential of 0.77 V *** (100 mV lower than the pristine hematite).The performance is much higher than that of the sample treated by Zr or F alone,suggesting the synergistic effect between bulk Fe_(2)ZrO_(5) and surface FeF_(x) .By coupling with the FeNiOOH co-catalyst,the final photoanode can achieve a high photocurrent density of 2.81 mA/cm^(2) at 1.23 V *** novel design of Zr and F co-modified hematite can be used as a promising way to prepare efficient catalysts for solar water splitting.

关键词： Hematite Fe_(2)ZrO_(5) Fluorination Solar water splitting

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Insights into the intelligent multi-field response of nonlinear permittivity in the canonical antiferroelectric ceramics

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Journal of materials Science & Technology 2025年第1期204卷 10-17页

作者： Yizheng Bao Xuefeng Chen Kunjie Lou Canyu Che Fei Cao Shiguang Yan Genshui Wang Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201800China State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Due to the atomic-level centrosymmetric spontaneous polarization,antiferroelectric materials exhibit a sensitively nonlinear capacitive response to plural physic fields(mainly electric field and temperature)in a certain range,consequently leading to some superb material properties,e.g.,ripple suppression,elec-trocaloric cooling,and dielectric energy ***,there are many cognitive blanks about how this exotic multi-field relationε(E_(DC),T)is influenced and manipulated via microscopic structures in the *** this work,the classic antiferroelectric ceramics PLZT were selected to see this intelligent effect,based on a quad-parameterizedε(E_(DC))relation on the dependence of T.εrelations were studied under different material compositions,temperature,frequency,AC electric field,and DC electric field,re-vealing lattice/domain structure evolution and the underlying *** inherent phase stability,introduced random field,and hierarchical hysteresis states were found to co-dominate this multi-field nonlinear *** work would not only contribute to future progress in the current applications(ripple suppression/electrocaloric cooling/dielectric energy storage)but imply the possibility of co-sensing temperature and electric potential simply and smartly.

关键词： Antiferroelectric ceramic Nonlinear permittivity Positive bias-field permittivity Multi-field response Temperature-electric potential co-sensing

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Bimetal nanoparticles hybridized with carbon nanotube boosting bifunctional oxygen electrocatalytic performance

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Rare Metals 2022年第8期41卷 2616-2623页

作者： Chen Sun Yong-Jie Zhao Xuan-Yi Yuan Jing-Bo Li Hai-Bo Jin Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Opto-Electronic Functional Materials&Micro-Nano Devices Department of PhysicsRenmin University of ChinaBeijing100872China

Developing bifunctional oxygen catalysts with high efficiency and low cost to replace platinum-group metal catalysts commonly utilized in metal-air batteries is critically *** this article,a convenient method to synthesis NiFe nanoparticles hybridized with N-doped carbon nanotube(NiFe@N-CNTs)is *** performance analysis indicates that Ni_(x)Fc_(1-x)@N-CNTs offers favorable oxygen reduction reaction(ORR)kinetics(onset potential(E_(onset))is 0.87 V and half-wave potential(E_(1/2))is0.84 V),together with excellent oxygen evolution reaction(OER)performance(an overpotential of 270 mV to drive10 mA·cm^(-2)).Contributed by the synergetic effect between NiFe alloy and N-CNTs,when being utilized as air cathode,rechargeable Zn-air batteries present superior cycling stability for over 150 *** research provides a universal strategy to synthesize the hybrids of intertwined carbon nanotube matrix loaded with alloy nanoparticles.

关键词： NiFe alloy Oxygen evolution reaction(OER) Oxygen reduction reaction(ORR) Zn-air batteries

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