Extended Data Fig. 4: Longitudinal and transverse components of the fitted \(\partial\;{\overleftrightarrow{g}}/\partial {V}_{i}\).
From: Sweet-spot operation of a germanium hole spin qubit with highly anisotropic noise sensitivity
a–c. Using the fitted \(\partial\;{\overleftrightarrow{g}}/\partial {V}_{i}\), as detailed in Fig. 4 of the main text and Extended Data Table 1, we plot the expected normalized resonance frequency fluctuation of Q2 as a result of a voltage fluctuation on gate P2 (a), B2 (b), and B12 (c) for different magnetic field orientations. Zero crossings are marked in green, to indicate the presence of a true sweet spot. d–f. Expected normalized Rabi frequency fluctuation of Q2 as a result of a drive excitation with amplitude Vi on gate P2 (d), B2 (e), and B12 (f) for different magnetic field orientations. g–i. Expected ratio of the transverse and longitudinal components (∂fRabi/∂Vi)/(∂fQ2/∂VP2) as a result of a drive amplitude on gate P2 (g), B2 (h), and B12 (i) for different magnetic field orientations. We assume the noise to couple in predominantly as if it is applied to the plunger gate P2.
