Fig. 2.

(A) Running integral $G\left(t\right)$ over the memory function; Inset shows a lin-log plot. The horizontal dashed line denotes the total friction coefficient $\overline{\gamma }$. (B) Memory function $\mathrm{\Gamma }\left(t\right)$; Inset includes short times. Gray lines correspond to the numerical data; red lines correspond to the multiexponential fit according to Eq. 3. (C) Mean-square displacement of the reaction coordinate; MD (blue line) and GLE (orange broken line) simulation results agree perfectly and exhibit superdiffusion for times up to 0.1 ps and subdiffusion up to 1 ns. Underdamped (underd.; red line) and overdamped (overd.; green line, underneath the red line) Markovian Langevin simulations agree perfectly with each other but miss the anomalous diffusion.