Impact of correlated noise in an energy depot model
                                   Chunhua Zeng, Jiakui Zeng, Feng Liu & Hua Wang
Based on the depot model of the motion of active Brownian particles (ABPs),Based on the depot model of the motion of active Brownian particles (ABPs), the impact of crosscorrelated multiplicative and additive noises has been investigated. Using a nonlinear Langevin
approach, we discuss a new mechanism for the transport of ABPs in which the energy originates from correlated noise. It is shown that the correlation between two types of noise breaks the symmetry of
the potential to generate motion of the ABPs with a net velocity. The absolute maximum value of the
mean velocity depends on correlated noise or multiplicative noise, whereas a monotonic decrease in the
mean velocity occurs with additive noise. In the case of no correlation, the ABPs undergo pure diffusion
with zero mean velocity, whereas in the case of perfect correlation, the ABPs undergo pure drift with
zero diffusion. This shows that the energy stemming from correlated noise is primarily converted
to kinetic energy of the intrawell motion and is eventually dissipated in drift motion. A physical
explanation of the mechanisms for noise-driven transport of ABPs is derived from the effective potential
of the Fokker-Planck equation.

论文链接地址：http://www.nature.com/articles/srep19591

2016srep19591.pdf