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arXiv · 2205.04905

Nonlinear response and crosstalk of electrically driven silicon spin qubits

Brennan Undseth·Xiao Xue·Mohammad Mehmandoost·Maximilian Russ·Pieter T. Eendebak·Nodar Samkharadze·Amir Sammak·Viatcheslav V. Dobrovitski·Giordano Scappucci·Lieven M. K. Vandersypen
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Abstract

Micromagnet-based electric dipole spin resonance (EDSR) offers an attractive path for the near-term scaling of dense arrays of silicon spin qubits in gate-defined quantum dots while maintaining long coherence times and high control fidelities. However, accurately controlling dense arrays of qubits using a multiplexed drive will require an understanding of the crosstalk mechanisms that may reduce operational fidelity. We identify a novel crosstalk mechanism whereby the Rabi frequency of a driven qubit is drastically changed when the drive of an adjacent qubit is turned on. These observations raise important considerations for scaling single-qubit control.

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Brennan Undseth, Xiao Xue, Mohammad Mehmandoost, Maximilian Russ, Pieter T. Eendebak, Nodar Samkharadze, Amir Sammak, Viatcheslav V. Dobrovitski, Giordano Scappucci, Lieven M. K. Vandersypen. 2022-05-10. Nonlinear response and crosstalk of electrically driven silicon spin qubits. https://doi.org/10.1103/physrevapplied.19.044078

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