Published in Phys. Rev. Research: Coupling a high-Q resonator to a spin qubit with all-electrical control
High-Q resonators make possible fast spin readout but are susceptible to crosstalk and suffer from ringup due to qubit control pulses. Here, we report on the coherent and all-electrical control of a Si:FinFET hole spin qubit at 1.5 K with a niobium nitride nanowire inductor connected to one of its gates.
Our experiments show that qubit control pulses can reduce the readout visibility if the pulse harmonics hit the resonator frequency. By engineering control pulses around the tank resonances or by using smooth pulse envelopes, such effects can be avoided. Moreover, the ringup is found to not influence the spin coherence. This shows that high-Q resonators for gate-sensing are compatible with all-electrical spin control.
Collaboration between the University of Basel and IBM Research, supported by the the NCCR SPIN of the Swiss NSF, and the Swiss Nanoscience Institute (SNI).
Coupling a high-Q resonator to a spin qubit with all-electrical control
Rafael S. Eggli, Taras Patlatiuk, Eoin G. Kelly, Alexei Orekhov, Gian Salis, Richard J. Warburton, Dominik M. Zumbühl, and Andreas V. Kuhlmann, Phys. Rev. Res. 7, 013197 (Feb 24, 2025), manuscript pdf, open data zenodo link