Characterization and optimization of tunable couplers via adiabatic control in superconducting circuits
Xuan Zhang, Xu Zhang, Changling Chen, Kai Tang, Kangyuan Yi, Kai Luo, Zheshu Xie, Yuanzhen Chen, Tongxing Yan
DOI 10.1103/wgqf-8rcy · Physical Review Applied
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
In the pursuit of scalable superconducting quantum computing, tunable couplers have emerged as a pivotal component, offering the flexibility required for complex quantum operations of high performance. In most current architectures of superconducting quantum chips, such couplers are not equipped with dedicated readout circuits to reduce complexity in both design and operation. However, this strategy poses challenges in precise characterization, calibration, and control of the couplers. In this work, we develop a hardware-efficient and robust technique based on adiabatic control to address this issue. The critical ingredient of this technique is adiabatic swap operation between a tunable coupler and nearby qubits. Using this technique, we have characterized and calibrated tunable couplers in our chips and achieved straightforward and precise control over these couplers. For example, we have demonstrated the calibration and correction of the flux distortion of couplers. In addition, we have also expanded this technique to tune the dispersive shift between a frequency-fixed qubit and its readout resonator over a wide range.
Similar papers
High-precision pulse calibration of tunable couplers for high-fidelity two-qubit gates in superconducting quantum processors
similarity 0.93Tian-Ming Li et al.
Source status unknown — claims are unverified
Parametric Multielement Coupling Architecture for Coherent and Dissipative Control of Superconducting Qubits
similarity 0.93G.B.P. Huber et al.
Source status unknown — claims are unverified
Demonstration of a Tuneable Coupler for Superconducting Qubits Using Coherent, Time Domain, Two-Qubit Operations
similarity 0.92R. C. Bialczak et al. · 2010 · arXiv:1007.2219
Source status unknown — claims are unverified
Tuning the coupling between superconducting resonators with collective qubits
similarity 0.92Qi-Ming Chen et al.
Source status unknown — claims are unverified
Coupling superconducting flux qubits at optimal point via dynamic decoupling with the quantum bus
similarity 0.92Ying-Dan Wang et al.
Source status unknown — claims are unverified
Tunable and switchable coupling between two superconducting resonators
similarity 0.91A. Baust et al.
Source status unknown — claims are unverified