Ai Bao-Quan, Liu Guo-Tao, Xie Hui-Zhang, Wen De-Hua, Wang Xian-Ju, Chen Wei, Liu Liang-Gang
Department of Physics, ZhongShan University, GuangZhou, China.
Chaos. 2004 Dec;14(4):957-62. doi: 10.1063/1.1788111.
We present a detailed study of the transport and the efficiency of a ratchet system in a periodic potential in the presence of correlated noises. The current and the efficiency of the system are investigated. It is found that, when the potential is spatially symmetric, the correlation between the two noises can induce a net transport. The efficiency shows many interesting features as a function of the applied force, the noise intensity, the external load, etc. The efficiency can be maximized as a function of noise intensity (or temperature), which shows that the thermal fluctuation can facilitate the efficiency of energy transformation.
我们对存在关联噪声的周期性势场中棘轮系统的输运和效率进行了详细研究。研究了该系统的电流和效率。结果发现，当势场在空间上对称时，两种噪声之间的相关性可诱导净输运。效率作为外加力、噪声强度、外部负载等的函数呈现出许多有趣的特征。效率可作为噪声强度（或温度）的函数达到最大值，这表明热涨落可促进能量转换效率。
