Journal
PHYSICAL REVIEW LETTERS
Volume 94, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.070602
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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 nu in the period-averaged escape rate depends on A nonmonotonically. Near the bifurcation amplitude A(c) it scales as nu sigma (A(c) - A)(zeta). We identify three scaling regimes, with zeta =1/4, - 1, and 1/2.
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