Figure 4

Aging dynamics in the active glass phase upon melting and re-vitrification. Time correlation function of the total angular velocity, C(t, t _w ), for different waiting times t _w and different breathing amplitudes ϕ _br: (a) ϕ _br = 0.38, (b) ϕ _br = 0.40, and (c) ϕ _br = 0.42, all starting from the active glass phase at ϕ _init = 0.5. The data were collected for N = 400 particles with a = 2, averaged over 100 independent equilibrated starting configurations. As a reference, we also show the results for a passive system without any self-propulsion, plotted as dashed lines in panel (a) for ϕ _br = 0.38.