title: Resonant activations for a fluctuating barrier system driven by dichotomous noise and Gaussian white noise.
abstract: We consider the escape over a fluctuating barrier in the presence of a dichotomous noise and a Gaussian white noise. It is shown that the mean first passage time (MFPT) over the fluctuating barrier displays two resonant activations. One is the resonant activation of the MFPT as a function of the flipping rate of the fluctuating potential barrier; the other is the resonant activation of the MFPT as a function of the transition rate of the dichotomous noise. In addition, we find that the dichotomous noise can weaken the former resonant activation, but enhance the latter one. By further study, we find that, when the fluctuating potential barrier is driven by two or more dichotomous noises, there are three or more resonant activations.
authors.affiliation: Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008, China.
authors.forename: J H
authors.initials: JH
authors.lastname: Li
authors.forename: D Y
authors.initials: DY
authors.lastname: Xing
authors.forename: J M
authors.initials: JM
authors.lastname: Dong
authors.forename: B
authors.initials: B
authors.lastname: Hu