Fig. 7.

The evolution of $q(t)=\tilde{q}(s(t))+\pi (t)$ and the formal QSSA $\tilde{q}(s(t))$ for $L=K=1$, $\kappa =16$ and different values $V=0.1,1,2,10$. During an initial layer phase, q grows from $q(0)=0$ to the maximum where $q(t_m)=\tilde{q}(s(t_m))$ and $\pi =0$ holds. For the subsequently decay phase, q can be approximated by a QSSA $\tilde{q}(s(t))$ for sufficiently large parameters V. Note that $\pi (t)>0$ holds during the decay phase (Color figure online)