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arXiv · 2609.15751

Effects of residual exchange coupling on simultaneously driven spin qubits

Heun Mo Yoo·Tanner M. Janda·Victor Yu·Michael J. Gullans·Adam R. Mills·Jason R. Petta
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Abstract

Exchange coupling and microwave drives are widely used control mechanisms for spin qubits. However, the influence of exchange coupling on microwave-driven spin dynamics is not fully understood. We report simultaneous drive measurements of two spin qubits as a function of exchange coupling and drive power. When the Rabi frequency exceeds exchange, we observe a beating pattern in the Rabi oscillations. In the opposite limit, two exchange-split patterns emerge in the Rabi chevrons. We find that these exchange-induced effects are suppressed when the difference in the Rabi frequencies exceeds the exchange coupling. A theoretical model is developed that reproduces the main features in our data.

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Heun Mo Yoo, Tanner M. Janda, Victor Yu, Michael J. Gullans, Adam R. Mills, Jason R. Petta. 2026-09-14. Effects of residual exchange coupling on simultaneously driven spin qubits. https://arxiv.org/abs/2609.15751

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