Effects of residual exchange coupling on simultaneously driven spin qubits

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.

Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Physics (quant-ph)

arXiv:2609.15751 [cond-mat.mes-hall]

(or arXiv:2609.15751v1 [cond-mat.mes-hall] for this version)

https://doi.org/10.48550/arXiv.2609.15751 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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