Experiments on the collective behavior and phase synchronization of weakly coupled populations of nonidentical chaotic electrochemical oscillators are described. The weak coupling has only a small effect on the local dynamics, i.e., through changes in frequency, but it has a strong influence on the collective or overall behavior. With added weak global or short-range coupling, a deviation from the law of large numbers is observed; large, irregular, and periodic mean-field oscillations occur, along with (partial) phase synchronization.
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Kiss et al. (2002) studied this question.
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