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Remote entangling gate between a quantum dot spin and a transmon qubit mediated by microwave photons
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作者 朱行宇 朱乐天 +1 位作者 涂涛 李传锋 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第2期52-59,共8页
Spin qubits and superconducting qubits are promising candidates for realizing solid-state quantum information processors.Designing a hybrid architecture that combines the advantages of different qubits on the same chi... Spin qubits and superconducting qubits are promising candidates for realizing solid-state quantum information processors.Designing a hybrid architecture that combines the advantages of different qubits on the same chip is a highly desirable but challenging goal.Here we propose a hybrid architecture that utilizes a high-impedance SQUID array resonator as a quantum bus,thereby coherently coupling different solid-state qubits.We employ a resonant exchange spin qubit hosted in a triple quantum dot and a superconducting transmon qubit.Since this hybrid system is highly tunable,it can operate in a dispersive regime,where the interaction between the different qubits is mediated by virtual photons.By utilizing such interactions,entangling gate operations between different qubits can be realized in a short time of 30 ns with a fidelity of up to 96.5%under realistic parameter conditions.Further utilizing this interaction,remote entangled state between different qubits can be prepared and is robust to perturbations of various parameters.These results pave the way for exploring efficient fault-tolerant quantum computation on hybrid quantum architecture platforms. 展开更多
关键词 hybrid quantum architectures circuit quantum electrodynamics entangling gate
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SDSS J1042-0018:a Broad Line AGN but Misclassified as an HⅡGalaxy in the BPT Diagram by Flux Ratios of Narrow Emission Lines
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作者 Yi Cao Si-Dan Zhao +3 位作者 xing-yu zhu Hai-Chao Yu Yi-Wei Wang Xue-Guang Zhang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2022年第4期114-122,共9页
In this paper,we discuss properties of SDSS J1042-0018 which is a broad line active galactic nucleus(AGN)but misclassified as an H II galaxy in the BPT diagram(SDSS J1042-0018 is called a misclassified broad line AGN)... In this paper,we discuss properties of SDSS J1042-0018 which is a broad line active galactic nucleus(AGN)but misclassified as an H II galaxy in the BPT diagram(SDSS J1042-0018 is called a misclassified broad line AGN).The emission lines around Hαand around Hβare well described by different model functions,considering broad Balmer lines to be described by Gaussian or Lorentz functions.Different model functions lead to different determined narrow emission line fiuxes,but the different narrow emission line fiux ratios lead SDSS J1042-0018 as an H II galaxy in the BPT diagram.In order to explain the unique properties of the misclassified broad line AGN SDSS J1042-0018,two methods are proposed,the star-forming contributions and the compressed narrow emission line regions with high electron densities near to critical densities of forbidden emission lines.Fortunately,the strong star-forming contributions can be preferred in SDSS J1042-0018.The misclassified broad line AGN SDSS J1042-0018,well explained by star-forming contributions,could provide further clues on the applications of BPT diagrams to the normal broad line AGNs. 展开更多
关键词 active galaxies active galactic nuclei emission line galaxies QUASARS
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Measurement of Spin Singlet-Triplet Qubit in Quantum Dots Using Superconducting Resonator
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作者 xing-yu zhu Tao Tu +2 位作者 Ao-Lin Guo Zong-Quan Zhou Guang-Can Guo 《Chinese Physics Letters》 SCIE CAS CSCD 2020年第2期6-10,共5页
The spin qubit in quantum dots is one of the leading platforms for quantum computation.A crucial requirement for scalable quantum information processing is the high efficient measurement.Here we analyze the measuremen... The spin qubit in quantum dots is one of the leading platforms for quantum computation.A crucial requirement for scalable quantum information processing is the high efficient measurement.Here we analyze the measurement process of a quantum-dot spin qubit coupled to a superconducting transmission line resonator.Especially,the phase shift of the resonator is sensitive to the spin states and the gate operations.The response of the resonator can be used to measure the spin qubit efficiently,which can be extend to read out the multiple spin qubits in a scalable solid-state quantum processor. 展开更多
关键词 computation. quantum measurement.
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Meso-scale corrosion expansion cracking of ribbed reinforced concrete based on a 3D random aggregate model 被引量:3
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作者 Zhi-qiang ZHANG Yong-long LI +1 位作者 xing-yu zhu Xin-hua LIU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2021年第11期924-940,共17页
In reinforced concrete structures,corrosion of the rebar produces 2–6 times more corrosion product than the original material,creating pressure on the surrounding concrete,leading to cracking.The study of corrosion a... In reinforced concrete structures,corrosion of the rebar produces 2–6 times more corrosion product than the original material,creating pressure on the surrounding concrete,leading to cracking.The study of corrosion and cracking in reinforced concrete structures is therefore of great importance for enhancing the durability of concrete.Unlike many previous studies,we used ribbed rebar similar to that used commercially and considered the mechanical behavior of the interface transition zone(ITZ)between the aggregate and mortar to simulate the processes of corrosion and cracking of reinforced concrete structures.We explored the failure mode of the interface layer under uniform corrosion and the influence of different factors on the corrosion expansion cracking and the shedding mode of a concrete cover.This was achieved by establishing a three-phase meso-scale model of concrete based on secondary development of ABAQUS,simulating the mechanical behavior of the ITZ using a cohesive element,and establishing a rust expansion cracking model for single and multiple rebars.The results showed that:(1)Under uniform rust expansion,concrete cracks are distributed in a cross pattern with a slightly shorter lower limb.(2)When the corrosion rate is low,the ITZ is not damaged.With an increase in the corrosion rate,the proportion of elements with tensile damage in the ITZ first increases and then decreases.(3)In the case of a single rebar,the larger the cover thickness,the higher the corrosion rate corresponding to ITZ failure,and the arrangement of the rebar has little influence on the ITZ failure mode.(4)In the case of multiple rebars,the concrete cover cracks when the rebar spacing is small,and wedge-shaped spalling occurs when the spacing is large. 展开更多
关键词 Rebar corrosion 3D meso-scale model Cohesion model Interface transition zone Failure mode
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Fabrication of virus-like particles with strip-pattern surface:A two-step self-assembly approach 被引量:5
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作者 Shuo Zhang Chun-Hua Cai +2 位作者 Zhou Guan Jia-Ping Lin xing-yu zhu 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第4期839-844,共6页
Spherical nanostructures with striped patterns on the surfaces resembling the essential structures of natural virus particles were constructed through a two-step self-assembly approach of polystyrene-boligo(acrylic a... Spherical nanostructures with striped patterns on the surfaces resembling the essential structures of natural virus particles were constructed through a two-step self-assembly approach of polystyrene-boligo(acrylic acid)(PS-b-oligo-AA) and poly(γ-benzyI L-glutamate)-b-poly(ethylene glycol)(PBLG-bPEG) copolymer mixtures in solution.On the basis of difference in hydrophilicity and self-assembly properties of the two copolymers,the two-step self-assembly process is realized.It was found that PS-boligo-AA copolymers formed spherical aggregates by adding a certain amount of water into polymer solutions in the first step.In the second step,two polymer solutions were mixed and water was further added,inducing the self-assembly of PBLG-b-PEG on the surfaces of PS-b-oligo-AA spheres to form striped patterns.In-depth study was conducted for the indispensable defects of striped patterns which are dislocations and +1/2 disclinations.The influencing factors such as the mixing ratio of two copolymers and the added water content in the first step on the morphology and defects of the striped patterns were investigated.This work not only presents an idea to interpret mechanism of the cooperative self-assembly behavior,but also provides an effective approach to construct virus-like particles and other complex structures with controllable morphology. 展开更多
关键词 Virus-like particles Two-step self-assembly Striped patterns Defects Polypeptide Ordered structure
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