Extended Data Figure 7: Kondo peak for temperature dependence.

Left panel, bias dependence of conductance and phase for the Kondo ridge used to determine the temperature dependence of Fig. 4a. Right panel, corresponding gate dependence at base temperature (255 mK) and at high temperature (2.05 K). To get rid of the thermal drift of the phase, we compute the difference of the phase between a Coulomb peak (green arrow) and a Coulomb valley (blue arrow), where the Kondo ridge is. The phase at 2.05 K has been rescaled to take into account the decrease of the quality factor of the cavity with temperature (22,000 to 18,000).