中国物理B ›› 2025, Vol. 34 ›› Issue (1): 10308-010308.doi: 10.1088/1674-1056/ad8db1

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Correcting on-chip distortion of control pulses with silicon spin qubits

Ming Ni(倪铭)1,2†, Rong-Long Ma(马荣龙)1,2†, Zhen-Zhen Kong(孔真真)3, Ning Chu(楚凝)1,2, Wei-Zhu Liao(廖伟筑)1,2, Sheng-Kai Zhu(祝圣凯)1,2, Chu Wang(王儲)1,2, Gang Luo(罗刚)1,2, Di Liu(刘頔)1,2, Gang Cao(曹刚)1,2,4, Gui-Lei Wang(王桂磊)4,5, Hai-Ou Li(李海欧)1,2,4, and Guo-Ping Guo(郭国平)1,2,4,6   

  1. 1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China (USTC), 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 Integrated Circuit Advanced Process Research and Development Center, Institute of Microelectronics, Chinese Academy of Sciences (CAS), Beijing 100029, China;
    4 Hefei National Laboratory, Hefei 230088, China;
    5 Beijing Superstring Academy of Memory Technology, Beijing 100176, China;
    6 Origin Quantum Computing Company Limited, Hefei 230026, China
  • 收稿日期:2024-09-02 修回日期:2024-10-22 接受日期:2024-11-01 发布日期:2024-12-24
  • 通讯作者: Hai-Ou Li E-mail:haiouli@ustc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074368, 92165207, 12474490, 12034018, and 92265113), the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0302300), and the USTC Tang Scholarship. This work was partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication.

Correcting on-chip distortion of control pulses with silicon spin qubits

Ming Ni(倪铭)1,2†, Rong-Long Ma(马荣龙)1,2†, Zhen-Zhen Kong(孔真真)3, Ning Chu(楚凝)1,2, Wei-Zhu Liao(廖伟筑)1,2, Sheng-Kai Zhu(祝圣凯)1,2, Chu Wang(王儲)1,2, Gang Luo(罗刚)1,2, Di Liu(刘頔)1,2, Gang Cao(曹刚)1,2,4, Gui-Lei Wang(王桂磊)4,5, Hai-Ou Li(李海欧)1,2,4, and Guo-Ping Guo(郭国平)1,2,4,6   

  1. 1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China (USTC), 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 Integrated Circuit Advanced Process Research and Development Center, Institute of Microelectronics, Chinese Academy of Sciences (CAS), Beijing 100029, China;
    4 Hefei National Laboratory, Hefei 230088, China;
    5 Beijing Superstring Academy of Memory Technology, Beijing 100176, China;
    6 Origin Quantum Computing Company Limited, Hefei 230026, China
  • Received:2024-09-02 Revised:2024-10-22 Accepted:2024-11-01 Published:2024-12-24
  • Contact: Hai-Ou Li E-mail:haiouli@ustc.edu.cn
  • About author:2025-010308-241269.pdf
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074368, 92165207, 12474490, 12034018, and 92265113), the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0302300), and the USTC Tang Scholarship. This work was partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication.

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摘要： In semiconductor quantum dot systems, pulse distortion is a significant source of coherent errors, which impedes qubit characterization and control. Here, we demonstrate two calibration methods using a two-qubit system as the detector to correct distortion and calibrate the transfer function of the control line. Both methods are straightforward to implement, robust against noise, and applicable to a wide range of qubit types. The two methods differ in correction accuracy and complexity. The first, coarse predistortion (CPD) method, partially mitigates distortion. The second, all predistortion (APD) method, measures the transfer function and significantly enhances exchange oscillation uniformity. Both methods use exchange oscillation homogeneity as the metric and are suitable for any qubit driven by a diabatic pulse. We believe these methods will enhance qubit characterization accuracy and operation quality in future applications.

关键词: quantum computation, quantum dot, pulse distortion}

Abstract: In semiconductor quantum dot systems, pulse distortion is a significant source of coherent errors, which impedes qubit characterization and control. Here, we demonstrate two calibration methods using a two-qubit system as the detector to correct distortion and calibrate the transfer function of the control line. Both methods are straightforward to implement, robust against noise, and applicable to a wide range of qubit types. The two methods differ in correction accuracy and complexity. The first, coarse predistortion (CPD) method, partially mitigates distortion. The second, all predistortion (APD) method, measures the transfer function and significantly enhances exchange oscillation uniformity. Both methods use exchange oscillation homogeneity as the metric and are suitable for any qubit driven by a diabatic pulse. We believe these methods will enhance qubit characterization accuracy and operation quality in future applications.

Key words: quantum computation, quantum dot, pulse distortion}

中图分类号:  (Quantum computation architectures and implementations)

  • 03.67.Lx
03.67.-a (Quantum information) 68.65.Hb (Quantum dots (patterned in quantum wells))