Fig. 3.

Break-up of 3-cluster state via intercluster hoppings for $J_0=0.13$. a IBI histogram. Delocalization of IBIs through crossing the left and the right vertical boundary lines of the gray region (corresponding to $2T_c$ and $4T_c,$ respectively). Sequential long-term raster plots of burst onset times in the whole population and in the Ith cluster ($I=1,2,$ and 3) in b1 the early, b2 the intermediate, and b3 the final stages; in (b1, b2), late burstings with IBIs larger than $4T_c$ and early burstings with IBI smaller than $2T_c$ are plotted with gray and black dots of a little larger point size. IWPBR $R_w(t)$ of the whole population and ISPBR $R_s^{(I)}(t)$ of the Ith cluster ($I=$1, 2, and 3) in the c1 early, c2 the intermediate, and c3 the final stages