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Self-correlation function of the density modes Fs(k,t) versus time (log scale) in a 3D (Upper) and a 2D (Lower) glass-former for several temperatures T (from left to right T decreases). (Inset) Trajectory plot of one particle at the lowest T. The results are from the computer simulation study of the Newtonian dynamics of model glass-forming liquids in Flenner and Szamel (5).
