期刊
PHYSICAL REVIEW LETTERS
卷 94, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.070602
关键词
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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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