Switch-phase distributions and stochastic resonance

The de-synchronization mechanism that occurs for noise intensities above stochastic resonance is analyzed in terms of switch-time and switch-phase distributions. In particular, we observed that (i) the switch-time distributions exhibit thicker peak structures with maxima at the multiples (both odd and even) of the half forcing period; (ii) the switch-phase distributions are doubly peaked, being dominated by the in-phase and pi out-of-phase events. The appearance of these properties of the switch statistics is discussed on the grounds of numerical simulations. (C) 1998 Published by Elsevier Science B.V.