Extended Data Fig. 8: Spectroscopy at B_⊥ = 380 μT.

Note that here there was a slight overall frequency shift due to a change in the electrostatic environment of the nanowire. Here we plot both I (a) and Q (b) to present information in both quadratures. The observed instabilities varied with time, and occurred when operating our flux coil at high current. The same data is plotted in (c)/(d), but with overlaid fits. We describe the data by the model used in Fig. 2(c), but we include an additional Zeeman-like term (see Supplementary Information Section 4).