Clustering of arrays of chaotic chemical oscillators by feedback and forcing

Feedback and external forcing are applied to an array of chaotic electroche mical oscillators through variations in the applied potential. We see trans itions from intermittent clusters to stable chaotic clusters to stable peri odic clusters to synchronized states as the feedback gain and forcing ampli tude, respectively, are varied. With forcing up to four clusters are observ ed in stable states. The transition to synchronization with feedback occurs by the increase in the size of one cluster at the expense of the others.