Dynamical susceptibility of glass formers: Contrasting the predictions of theoretical scenarios
Dynamical susceptibility of glass formers: Contrasting the predictions of theoretical scenarios
We compute analytically and numerically the four-point correlation function that characterizes non-trivial cooperative dynamics in glassy systems within several models of glasses: elasto-plastic deformations, mode-coupling theory (MCT), collectively rearranging regions (CRR), diffusing defects and kinetically constrained models (KCM). Some features of the four-point susceptibility chi_4(t) are expected to be universal. …