Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1860853 | Physics Letters A | 2011 | 9 Pages |
We study the effects of noise intensity fluctuations on the stationary and dynamical properties of an overdamped Langevin model with a bistable potential and external periodical driving force. We calculated the stationary distributions, mean-first passage time (MFPT) and the spectral amplification factor using a complete set expansion (CSE) technique. We found resonant activation (RA) and stochastic resonance (SR) phenomena in the system under investigation. Moreover, the strength of RA and SR phenomena exhibit non-monotonic behavior and their trade-off relation as a function of the squared variation coefficient of the noise intensity process. The reliability of CSE is verified with Monte Carlo simulations.
► Systems under noise intensity fluctuations are studied. ► Stationary distributions, mean-first passage time and stochastic resonance are calculated. ► We find the resonant phenomena in terms of variation coefficient of the noise intensity process.