Calibration and cancellation of microwave crosstalk in superconducting circuits

• Published in: Chinese physics B Vol. 32; no. 9; pp. 94203 - 310
• Main Authors: Yan, Haisheng, Zhao, Shoukuan, Xiang, Zhongcheng, Wang, Ziting, Yang, Zhaohua, Xu, Kai, Tian, Ye, Yu, Haifeng, Zheng, Dongning, Fan, Heng, Zhao, Shiping
• Format: Journal Article
• Language: English
• Published: Chinese Physical Society and IOP Publishing Ltd 01.09.2023; School of Physical Sciences,University of Chinese Academy of Sciences(UCAS),Beijing 100190,China%Beijing Academy of Quantum Information Sciences,Beijing 100193,China%Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences(CAS),Beijing 100190,China%Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences(CAS),Beijing 100190,China; Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences(CAS),Beijing 100190,China; School of Physical Sciences,University of Chinese Academy of Sciences(UCAS),Beijing 100190,China; CAS Center for Excellence in Topological Quantum Computation,UCAS,Beijing 100190,China; Hefei National Laboratory,Hefei 230088,China%Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences(CAS),Beijing 100190,China; Songshan Lake Materials Laboratory,Dongguan 523808,China; Hefei National Laboratory,Hefei 230088,China; Hefei National Laboratory,Hefei 230088,China%Beijing Academy of Quantum Information Sciences,Beijing 100193,China
• Subjects: microwave crosstalk; Rabi oscillation; superconducting qubit; Rabi oscillation; microwave crosstalk; superconducting qubit
• ISSN: 1674-1056
• DOI: 10.1088/1674-1056/acdc10

The precise control and manipulation of the qubit state are vital for quantum simulation and quantum computation. In superconducting circuits, one notorious error comes from the crosstalk of microwave signals applied to different qubit control lines. In this work, we present a method for the calibration and cancellation of the microwave crosstalk and experimentally demonstrate its effectiveness in a superconducting 10-qubit chain. The method is convenient and efficient especially for calibrating the microwave crosstalk with large amplitudes and variations, which can be performed successively to reduce the microwave crosstalk by two to three orders. The qubit chain with microwave driving is governed by one-dimensional (1D) Bose–Hubbard model in transverse field, which is nonintegrable and shows thermalization behaviour during the time evolution from certain initial states. Such thermalization process is observed with excellent agreement between experiment and theory further confirming the effective global cancellation of the microwave crosstalk.