Broad-band colored noise: digital simulation and dynamical effects.
We propose a broad-band colored noise, which allows the transition between "red" and "green" noises. A double-integral algorithm for solving the Langevin equation with this noise is developed. The steady currents of an overdamped particle moving in the correlation and diffusion ratchets are calculated. It is shown that the flow reverses sign when the external noise is filtered off in the region of low frequencies to a sufficient extent. The present noise is also compared with the Ornstein-Uhlenbeck colored noise and the harmonic noise.
Bao
J D
JD
China Center of Advanced Science and Technology, World Laboratory, P.O. Box 8730, Beijing 100080, China.
Liu
S J
SJ