Birhythmicity and Hard Excitation from Coupled Synthetic Feedback Loops
Figure 3
Typical time courses of state variable for the five parameter ranges (from left to right): (a) , single limit cycle oscillation for initial values , , , and ; (b) , birhythmicity, coexistence of two regimes of sustained oscillations corresponding to the large for initial values , , , and and small amplitude periodic orbits for initial values , , , and ; (c) , hard excitation, coexistence of two regimes of stable steady state for initial values , , , and and sustained oscillation for initial values , , , and ; (d) phase diagram of the state variables and with the same parameter values and initial values in panel (b).
