Figure 3

Phase diagram as a function of the coupling-strength (γ) and the connectivity k for a finite size \(N=16000\) nodes. The color code indicates the level of averaged overall activity s; this shifts from the quiescent phase (reddish colors) to the active phase (blueish colors). Horizontal dashed lines correspond to the critical points \({\gamma }_{c}^{e}\) and \({\gamma }_{c}\) in the large-N (thermodynamic) limit. The saturation value \({\gamma }^{sat}(k)\) corresponds to Eq. (6); results from simulations are marked as black points. The curve \({\gamma }_{c}^{e}(k,N)\) represents an interpolation of the values obtained from simulations and coincides within numerical precision with the dashed line in the large-N limit.