中国物理B ›› 2021, Vol. 30 ›› Issue (7): 70308-070308.doi: 10.1088/1674-1056/ac01c3

所属专题： SPECIAL TOPIC — Quantum computation and quantum simulation

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Universal quantum control based on parametric modulation in superconducting circuits

Dan-Yu Li(李丹宇)1, Ji Chu(储继)2, Wen Zheng(郑文)1, Dong Lan(兰栋)1, Jie Zhao(赵杰)1, Shao-Xiong Li(李邵雄)1,†, Xin-Sheng Tan(谭新生)1,‡, and Yang Yu(于扬)1   

  1. 1 National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China;
    2 Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
  • 收稿日期:2021-02-25 修回日期:2021-04-30 接受日期:2021-05-16 出版日期:2021-06-22 发布日期:2021-06-26
  • 通讯作者: Shao-Xiong Li, Xin-Sheng Tan E-mail:shaoxiong.li@nju.edu.cn;tanxs@nju.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301802), the National Natural Science Foundation of China (Grant Nos. 11474152, 12074179, and 61521001), and the Young Fund of Jiangsu Natural Science Foundation of China (Grant No. BK20180750).

Universal quantum control based on parametric modulation in superconducting circuits

Dan-Yu Li(李丹宇)1, Ji Chu(储继)2, Wen Zheng(郑文)1, Dong Lan(兰栋)1, Jie Zhao(赵杰)1, Shao-Xiong Li(李邵雄)1,†, Xin-Sheng Tan(谭新生)1,‡, and Yang Yu(于扬)1   

  1. 1 National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China;
    2 Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
  • Received:2021-02-25 Revised:2021-04-30 Accepted:2021-05-16 Online:2021-06-22 Published:2021-06-26
  • Contact: Shao-Xiong Li, Xin-Sheng Tan E-mail:shaoxiong.li@nju.edu.cn;tanxs@nju.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301802), the National Natural Science Foundation of China (Grant Nos. 11474152, 12074179, and 61521001), and the Young Fund of Jiangsu Natural Science Foundation of China (Grant No. BK20180750).

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摘要： As superconducting quantum circuits are scaling up rapidly towards the noisy intermediate-scale quantum (NISQ) era, the demand for electronic control equipment has increased significantly. To fully control a quantum chip of N qubits, the common method based on up-conversion technology costs at least 2×N digital-to-analog converters (DACs) and N IQ mixers. The expenses and complicate mixer calibration have become a hinderance for intermediate-scale quantum control. Here we propose a universal control scheme for superconducting circuits, fully based on parametric modulation. To control N qubits on a chip, our scheme only requires N DACs and no IQ mixer, which significantly reduces the expenses. One key idea in the control scheme is to introduce a global pump signal for single-qubit gates. We theoretically explain how the universal gates are constructed using parametric modulation. The fidelity analysis shows that parametric single-qubit (two-qubit) gates in the proposed scheme can achieve low error rates of 10-4, with a gate time of about 60 ns (100 ns).

关键词: superconducting qubits, parametric modulation, single-qubit gate, iSWAP gate

Abstract: As superconducting quantum circuits are scaling up rapidly towards the noisy intermediate-scale quantum (NISQ) era, the demand for electronic control equipment has increased significantly. To fully control a quantum chip of N qubits, the common method based on up-conversion technology costs at least 2×N digital-to-analog converters (DACs) and N IQ mixers. The expenses and complicate mixer calibration have become a hinderance for intermediate-scale quantum control. Here we propose a universal control scheme for superconducting circuits, fully based on parametric modulation. To control N qubits on a chip, our scheme only requires N DACs and no IQ mixer, which significantly reduces the expenses. One key idea in the control scheme is to introduce a global pump signal for single-qubit gates. We theoretically explain how the universal gates are constructed using parametric modulation. The fidelity analysis shows that parametric single-qubit (two-qubit) gates in the proposed scheme can achieve low error rates of 10-4, with a gate time of about 60 ns (100 ns).

Key words: superconducting qubits, parametric modulation, single-qubit gate, iSWAP gate

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

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