Fig. 2: FL resonances.
a, Inelastic collision rate coefficient βin between microwave-dressed NaK molecules as a function of the microwave detuning Δ for various microwave polarizations with the ellipticity angle ξ = 6(2)° (green), 19(2)° (blue) and 37(2)° (orange) at the Rabi frequency Ω ≈ 2π × 10 MHz. The solid lines show the corresponding theory calculations. The shaded regions show the calculations within the uncertainty of ξ. The grey dashed line denotes the theoretical universal value of βin and the grey dotted line denotes the single-channel unitarity limit. The coloured error bars show the standard deviation of the fit results and the black error bar illustrates the exemplary common systematic uncertainty. b,c, Colour density map of the experiment data (b) and the theory calculation (c) of the inelastic rate coefficient as a function of microwave detuning and ellipticity. The triangles on the right axis of b mark ellipticity for the data shown in a.
