![\[fig:Hvst\]Evolution of the spectral entropy $H(t)$ for $W=0,$ $L_{0}=00$. For (a) $g=00$ one essentially sees the effect of dilution, which progressively weakens the chaoticity of the system. For (b) $g=00^{0}$, there is a first phase, in which the self-trapping is progressively destroyed which is followed by a slow transition towards the chaotic regime.](figure0a "fig:"){width="0.0\columnwidth"}![\[fig:Hvst\]Evolution of the spectral entropy $H(t)$ for $W=0,$ $L_{0}=00$. For (a) $g=00$ one essentially sees the effect of dilution, which progressively weakens the chaoticity of the system. For (b) $g=00^{0}$, there is a first phase, in which the self-trapping is progressively destroyed which is followed by a slow transition towards the chaotic regime.](figure0