Fig. 6: Energy partitioning and apparent phase-contrast.

a The ratio of fluctuational probability density as a function of apparent phase contrast \(\phi ^ \ast\). The shaded area represents 95% confidence bands of the fits. The error bars in the probability estimates are in the order of less than 1%, computed from the area standard deviations of the phase histograms obtained at each amplitude setpoint. The red square denotes a sole outlier of the experimental fit. b Highlights the evolution of apparent phase-contrast as a function of the tapping amplitudes. The nonlinear behavior observed for DxO and MxD is indicative of inelastic deviations yielding to viscous relaxations at the heterogeneities. The error bars in the apparent phase contrast \(\phi ^ \ast\) are obtained from the standard deviations of measured phase histograms and the dynamic amplitude A.