Measured PS of the density field at ℳ = 7 and its fit with Eq. (2) with p = 2 for two different resolutions. The PS has been normalized by $8\mathbb{E}{(\rho )}^2{L}_{\mathrm{inj}}^3$ such that its asymptotic value at k → 0 corresponds to k³α. The dashed black line corresponds to k³α, with α = 2 × 10⁻², which is the value predicted by our model (see also D25). The shaded area corresponds to the 1σ uncertainties estimated from the time variations of the density power spectra. The inset of the left panel shows the projected density field for the 512³ resolution.