Universal quantum control based on parametric modulation in superconducting circuits

• 作者: Dan-Yu Li Ji Chu Wen Zheng Dong Lan Jie Zhao Shao-Xiong Li Xin-Sheng Tan Yang Yu
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: SPECIAL TOPIC—Quantum computation and quantum simulation
• 页码范围: 44-50
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/ac01c3

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 104,with a gate time of about 60 ns (100 ns).