Fig. 2
Comparison of the density (upper panel) and velocity (bottom panel) profiles of the same system evolved in an expanding background (EXP at a = 1.36 – black circles) and in a static background with open boundary conditions (STAT at t = 5τc – red squares). The best fit with Eq. (3) (QEP) and a line with slope − 1 are shown as references (see Eq. (4)).
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