Nonlinear Response and Crosstalk of Electrically Driven Silicon Spin Qubits
Brennan Undseth (Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab)
X. Xue (Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab)
Mohammad Mehmandoost (Kavli institute of nanoscience Delft, TU Delft - QID/Dobrovitski Group)
Maximilian Russ (TU Delft - QCD/Rimbach-Russ, Kavli institute of nanoscience Delft)
P.T. Eendebak (TU Delft - QuTech Advanced Research Centre, TU Delft - BUS/TNO STAFF)
Nodar Samkharadze (TU Delft - QuTech Advanced Research Centre, TU Delft - BUS/TNO STAFF)
Amir Sammak (TU Delft - QuTech Advanced Research Centre, TU Delft - BUS/TNO STAFF)
V.V. Dobrovitski (Kavli institute of nanoscience Delft, TU Delft - QID/Dobrovitski Group, TU Delft - QuTech Advanced Research Centre)
Giordano Scappucci (TU Delft - QCD/Scappucci Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
L.M.K. Vandersypen (TU Delft - QuTech Advanced Research Centre, TU Delft - QN/Vandersypen Lab, Kavli institute of nanoscience Delft)
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Abstract
Micromagnet-based electric dipole spin resonance 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 cross-talk mechanisms that may reduce operational fidelity. We identify an unexpected cross-talk 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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