中国物理B(英文版)2024,Vol.33Issue(9) :137-142.DOI:10.1088/1674-1056/ad711d

Coupling and characterization of a Si/SiGe triple quantum dot array with a microwave resonator

江顺利 蒋天翼 徐永强 吴睿 郝天岳 叶澍坤 蔡冉冉 王保传 李海欧 曹刚 郭国平
中国物理B(英文版)2024,Vol.33Issue(9) :137-142.DOI:10.1088/1674-1056/ad711d

Coupling and characterization of a Si/SiGe triple quantum dot array with a microwave resonator

江顺利 1蒋天翼 1徐永强 1吴睿 1郝天岳 1叶澍坤 1蔡冉冉 1王保传 1李海欧 1曹刚 1郭国平2
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作者信息

  • 1. CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China
  • 2. CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Origin Quantum Computing Company Limited,Hefei 230088,China
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Abstract

Scaling up spin qubits in silicon-based quantum dots is one of the pivotal challenges in achieving large-scale semi-conductor quantum computation.To satisfy the connectivity requirements and reduce the lithographic complexity,utilizing the qubit array structure and the circuit quantum electrodynamics(cQED)architecture together is expected to be a feasible scaling scheme.A triple-quantum dot(TQD)coupled with a superconducting resonator is regarded as a basic cell to demon-strate this extension scheme.In this article,we investigate a system consisting of a silicon TQD and a high-impedance TiN coplanar waveguide(CPW)resonator.The TQD can couple to the resonator via the right double-quantum dot(RDQD),which reaches the strong coupling regime with a charge-photon coupling strength of go/(2π)=175 MHz.Moreover,we illustrate the high tunability of the TQD through the characterization of stability diagrams,quadruple points(QPs),and the quantum cellular automata(QCA)process.Our results contribute to fostering the exploration of silicon-based qubit integration.

Key words

triple-quantum dot/strong coupling/circuit quantum electrodynamics(cQED)/scalable silicon-based cQED architectures

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基金项目

National Natural Science Foundation of China(92265113)

National Natural Science Foundation of China(12074368)

National Natural Science Foundation of China(12304560)

National Natural Science Foundation of China(12034018)

China Postdoctoral Science Foundation(BX20220281)

China Postdoctoral Science Foundation(2023M733408)

USTC Center for Microand Nano scale Research and Fabrication()

出版年

2024
中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子:0.995
ISSN:1674-1056
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