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arXiv · 2506.10834

Automated All-RF Tuning for Spin Qubit Readout and Control

Cornelius Carlsson·Jaime Saez-Mollejo·Federico Fedele·Stefano Calcaterra·Daniel Chrastina·Giovanni Isella·Georgios Katsaros·Natalia Ares
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Abstract

Efficient tuning of spin qubits remains a major bottleneck in scaling semiconductor quantum dot-based quantum processors. A key challenge is the rapid identification of gate voltage regimes suitable for qubit initialisation, control, and readout. Here, we leverage radio-frequency charge sensing to automate spin qubit tuning, achieving a median tuning time of approximately 15 minutes. In a single continuous run, our routine identifies spin qubits at 12 distinct charge transitions in under 17 hours. Beyond tuning, our routine autonomously acquires data revealing the gate-voltage dependence of the exchange interaction, dephasing time, and quality factor -- quantities that vary substantially between charge configurations. These results represent a step change in high-throughput spin qubit tuning and provide a foundation for a systematic and automated exploration of semiconductor quantum circuits.

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Cornelius Carlsson, Jaime Saez-Mollejo, Federico Fedele, Stefano Calcaterra, Daniel Chrastina, Giovanni Isella, Georgios Katsaros, Natalia Ares. 2025-06-12. Automated All-RF Tuning for Spin Qubit Readout and Control. https://arxiv.org/abs/2506.10834

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