中国物理B ›› 2023, Vol. 32 ›› Issue (7): 70307-070307.doi: 10.1088/1674-1056/accd57

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Circuit quantum electrodynamics with a quadruple quantum dot

Ting Lin(林霆)1,2, Hai-Ou Li(李海欧)1,2, Gang Cao(曹刚)1,2,†, and Guo-Ping Guo(郭国平)1,2,3   

  1. 1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
    2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
    3 Origin Quantum Computing Company Limited, Hefei 230088, China
  • 收稿日期:2023-02-14 修回日期:2023-03-31 接受日期:2023-04-17 出版日期:2023-06-15 发布日期:2023-06-21
  • 通讯作者: Gang Cao E-mail:gcao@ustc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 92265113, 12074368, and 12034018).

Circuit quantum electrodynamics with a quadruple quantum dot

Ting Lin(林霆)1,2, Hai-Ou Li(李海欧)1,2, Gang Cao(曹刚)1,2,†, and Guo-Ping Guo(郭国平)1,2,3   

  1. 1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
    2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
    3 Origin Quantum Computing Company Limited, Hefei 230088, China
  • Received:2023-02-14 Revised:2023-03-31 Accepted:2023-04-17 Online:2023-06-15 Published:2023-06-21
  • Contact: Gang Cao E-mail:gcao@ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 92265113, 12074368, and 12034018).

摘要: In this theoretical work, we describe a mechanism for the coupling between a plane structure consisting of four quantum dots and a resonator. We systematically study the dependence of the quadruple coupling strength and the qubit decoherence rate and point out the optimized operating position of the hybrid system. According to the transmission given by the input-output theory, the signatures in the resonator spectrum are predicted. Furthermore, based on the parameters already achieved in previous works, we prove that the device described in this paper can achieve the strong coupling limit, i.e., this approach can be used for system extension under the existing technical conditions. Our results show an effective and promotable approach to couple quantum dot structures in plane with the resonator and propose a meaningful extension method.

关键词: semiconductor qubit, circuit quantum electrodynamics (QED), semiconductor quantum dot, scalable semiconductor-based circuit QED architectures

Abstract: In this theoretical work, we describe a mechanism for the coupling between a plane structure consisting of four quantum dots and a resonator. We systematically study the dependence of the quadruple coupling strength and the qubit decoherence rate and point out the optimized operating position of the hybrid system. According to the transmission given by the input-output theory, the signatures in the resonator spectrum are predicted. Furthermore, based on the parameters already achieved in previous works, we prove that the device described in this paper can achieve the strong coupling limit, i.e., this approach can be used for system extension under the existing technical conditions. Our results show an effective and promotable approach to couple quantum dot structures in plane with the resonator and propose a meaningful extension method.

Key words: semiconductor qubit, circuit quantum electrodynamics (QED), semiconductor quantum dot, scalable semiconductor-based circuit QED architectures

中图分类号:  (Quantum dots)

  • 73.21.La
03.67.Lx (Quantum computation architectures and implementations) 42.50.Wk (Mechanical effects of light on material media, microstructures and particles)