A bistable system driven by additive noise and multiplicative noise is studied,when the correlation time of the correlations between two noises is nonzero.It is found that the system undergoes a succession of two phas...A bistable system driven by additive noise and multiplicative noise is studied,when the correlation time of the correlations between two noises is nonzero.It is found that the system undergoes a succession of two phase transitions as the strength of the correlations between two noises increases.展开更多
The current of the molecular motor model disturbed by random potentials, which involve the dichotomous and Ornstein-Uhlenbeck potentials, is studied using a finite-space correlation function. It is found that: (i) the...The current of the molecular motor model disturbed by random potentials, which involve the dichotomous and Ornstein-Uhlenbeck potentials, is studied using a finite-space correlation function. It is found that: (i) the amplitude and the correlation length of random potentials play opposing roles in the transport of the molecular motor model;(ii) a random potential with small amplitude and large correlation length is very useful in the molecular motor system.展开更多
The simplest imaginable ratchet system which cantains two noises correlated with each other is discussed.It is found that(1)the correlation between noises can induce transport,even when the ratchet potential is comple...The simplest imaginable ratchet system which cantains two noises correlated with each other is discussed.It is found that(1)the correlation between noises can induce transport,even when the ratchet potential is completely symmetric in space and the driving forcing is symmetric in time,and(2)the system can exhibit a current in either direction,and the direction can be controlled by the intensity of the correlation between noises.展开更多
基金Supported by the Natural Science Foundation of Huazhong Normal Universityin part by the National Natural Science Foundation of China under Grant No.19475014.
文摘A bistable system driven by additive noise and multiplicative noise is studied,when the correlation time of the correlations between two noises is nonzero.It is found that the system undergoes a succession of two phase transitions as the strength of the correlations between two noises increases.
基金Supported by the National Natural Science Foundation of China under Grant No.19805003the Fok Ying Tung Education Foundation under Grant No.71007.
文摘The current of the molecular motor model disturbed by random potentials, which involve the dichotomous and Ornstein-Uhlenbeck potentials, is studied using a finite-space correlation function. It is found that: (i) the amplitude and the correlation length of random potentials play opposing roles in the transport of the molecular motor model;(ii) a random potential with small amplitude and large correlation length is very useful in the molecular motor system.
基金Supported by the National Natural Science Foundation of China under Grant No.19775017。
文摘The simplest imaginable ratchet system which cantains two noises correlated with each other is discussed.It is found that(1)the correlation between noises can induce transport,even when the ratchet potential is completely symmetric in space and the driving forcing is symmetric in time,and(2)the system can exhibit a current in either direction,and the direction can be controlled by the intensity of the correlation between noises.
