Complex Rotating Waves and Long Transients in a Ring-Network of   Electrochemical Oscillators with Sparse Random Cross-Connections
  We perform experiments and phase model simulations with a ring network of oscillatory electrochemical reactions to explore the effect of random connections and non-isochronocity of the interactions on the pattern formation. A few additional links facilitate the emergence of the fully synchronized state. With larger non-isochronicity, complex rotating waves or persistent irregular phase dynamics can derail the convergence to global synchronization. The observed long transients of irregular phase dynamics exemplify the possibility of a sudden onset of hyper synchronous behavior without any external stimulus or network reorganization. 
Michael Sebek, Ralf T\"onjes and Istv\'an Z. Kiss
cond-mat.dis-nn nlin.AO