Activated escape of periodically modulated systems
Abstract
The rate of noise-induced escape from a metastable state of a periodically modulated overdamped system is found for an arbitrary modulation amplitude A. The instantaneous escape rate displays peaks that vary with the modulation from Gaussian to strongly asymmetric. The prefactor in the period-averaged escape rate depends on A nonmonotonically. Near the bifurcation amplitude Ac it scales as (Ac-A)ζ. We identify three scaling regimes, with ζ = 1/4, -1, and 1/2.
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