Figure 11

(A)–(C) show the numbers of threshold crossings for both units n in greyscale for simulated trajectories at varying PR and df (uniformly sampled in 96 points) for different values of τ shown in top-right corner of each panel. Black corresponds to \(n=0\), and the lightest gray to \(n=4\). In (A) the blue and red curves are the analytically predicted coherence and fission boundaries defined in equations (20). In (C), yellow and purple crosses represent respectively the experimentally detected coherence and fission boundaries, replotted from Fig. 2 in [47]. We plotted regions outside the experimental range PR in 5–20 Hz for predictions. (D) Time histories for the model states in each of the five regions of panel (B), with values of PR and df shown by white dots in panel (B). All parameters are as in Fig. 3