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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