Compact pulse schedules for high-fidelity single-flux quantum qubit control
Phys. Rev. Applied 24, 014038 – Published 21 July, 2025
DOI: https://doi.org/10.1103/dtdk-kc2b
Abstract
In the traditional approach to controlling superconducting qubits using microwave pulses, the field of pulse shaping has emerged to assist in the removal of leakage and increase gate fidelity. However, the challenge of scaling microwave control electronics has created an opportunity to explore alternative methods such as single-flux quantum (SFQ) pulses. For qubits controlled by SFQ pulses, high fidelity gates can be achieved by optimization of the binary control sequence. We extend the notion of the derivative removal by adiabatic gate framework to a transmon qubit controlled by SFQ drivers. The proposed implementation of SFQ pulse sequences can be stored in 22 bits or fewer, with gate fidelities exceeding 99.99%. This modest memory requirement could help reduce the footprint of the SFQ coprocessors and power dissipation while preserving their inherent advantages of scalability and cost-effectiveness.
