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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 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 |
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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.
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Received: 02 September 2024
Revised: 22 October 2024
Accepted manuscript online: 01 November 2024
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PACS:
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03.67.Lx
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(Quantum computation architectures and implementations)
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03.67.-a
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(Quantum information)
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68.65.Hb
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(Quantum dots (patterned in quantum wells))
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| Fund: 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. |
Corresponding Authors:
Hai-Ou Li
E-mail: haiouli@ustc.edu.cn
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| About author: 2025-010308-241269.pdf |
Cite this article:
Ming Ni(倪铭), Rong-Long Ma(马荣龙), Zhen-Zhen Kong(孔真真), Ning Chu(楚凝), Wei-Zhu Liao(廖伟筑), Sheng-Kai Zhu(祝圣凯), Chu Wang(王儲), Gang Luo(罗刚), Di Liu(刘頔), Gang Cao(曹刚), Gui-Lei Wang(王桂磊), Hai-Ou Li(李海欧), and Guo-Ping Guo(郭国平) Correcting on-chip distortion of control pulses with silicon spin qubits 2025 Chin. Phys. B 34 010308
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