Robust, fast and high-fidelity composite single-qubit gates for superconducting transmon qubits

TL;DR

This paper presents a new composite pulse control technique for superconducting transmon qubits that enhances gate fidelity and robustness, reducing errors and gate times compared to traditional methods.

Contribution

The authors develop a novel composite pulse approach that significantly improves the precision and robustness of single-qubit gates in superconducting transmon qubits.

Findings

Substantial error rate reductions demonstrated in simulations

Effective mitigation of qubit frequency and anharmonicity variations

Validated improvements through four independent verification methods

Abstract

We introduce a novel quantum control method for superconducting transmon qubits that substantially outperforms conventional techniques in precision and robustness against coherent errors. Our approach leverages composite pulses (CP) to effectively mitigate system-specific errors, such as qubit frequency and anharmonicity variations. By utilizing CP, we demonstrate both complete and partial population transfers between qubit states, as well as the implementation of two essential single-qubit quantum gates. Simulations reveal substantial reductions in common error rates and gate durations. The effectiveness of our method is validated through four independent verification techniques, underscoring its potential for advancing quantum computing with superconducting qubits.