Abstract
We investigated the effects of asymmetry of the potential and noises on the mean first-passage time (MFPT) in two opposite directions in an asymmetric bistable system subjected to multiplicative colored and additive white noise with a correlated noise. The expression of the stationary probability distribution is obtained by means of an extended unified colored-noise approximation and the expressions of the MFPTs are derived through the steepest-descent approach. Numerical results show that the influence of the asymmetry coefficient r on T ∓ is different and because of the correlated noise, even for r = 0, T + (xs1→xs2, r) is not equal to T- (xs1→xs2, r). The curves of InT∓ versus r in both cases have mono-valleys but the mono-valleys move to the opposite directions with increasing correlation intensity λ.
Original language | English |
---|---|
Pages (from-to) | 5083-5087 |
Number of pages | 5 |
Journal | Wuli Xuebao/Acta Physica Sinica |
Volume | 56 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2007 |
Keywords
- Additive white noise
- Asymmetric bistable system
- Mean first-passage time
- Multiplicative colored noise