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.
@article{arxiv.2205.04905,
title = {Nonlinear response and crosstalk of electrically driven silicon spin qubits},
author = {Brennan Undseth and Xiao Xue and Mohammad Mehmandoost and Maximilian Russ and Pieter T. Eendebak and Nodar Samkharadze and Amir Sammak and Viatcheslav V. Dobrovitski and Giordano Scappucci and Lieven M. K. Vandersypen},
journal= {arXiv preprint arXiv:2205.04905},
year = {2023}
}