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Chin. Phys. B, 2021, Vol. 30(7): 070308    DOI: 10.1088/1674-1056/ac01c3
Special Issue: SPECIAL TOPIC — Quantum computation and quantum simulation
SPECIAL TOPIC—Quantum computation and quantum simulation Prev   Next  

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 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
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).
Keywords:  superconducting qubits      parametric modulation      single-qubit gate      iSWAP gate  
Received:  25 February 2021      Revised:  30 April 2021      Accepted manuscript online:  16 May 2021
PACS:  03.67.Lx (Quantum computation architectures and implementations)  
Fund: 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).
Corresponding Authors:  Shao-Xiong Li, Xin-Sheng Tan     E-mail:  shaoxiong.li@nju.edu.cn;tanxs@nju.edu.cn

Cite this article: 

Dan-Yu Li(李丹宇), Ji Chu(储继), Wen Zheng(郑文), Dong Lan(兰栋), Jie Zhao(赵杰), Shao-Xiong Li(李邵雄), Xin-Sheng Tan(谭新生), and Yang Yu(于扬) Universal quantum control based on parametric modulation in superconducting circuits 2021 Chin. Phys. B 30 070308

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