Haljas Astrid, Mankin Romi, Sauga Ako, Reiter Eerik
Department of Natural Sciences, Tallinn Pedagogical University, 25 Narva Road, 10120 Tallinn, Estonia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Oct;70(4 Pt 1):041107. doi: 10.1103/PhysRevE.70.041107. Epub 2004 Oct 28.
Overdamped motion of Brownian particles in a 1D periodic system with a simple symmetric sawtooth potential subjected to both unbiased thermal noise and spatially nonhomogeneous three-level colored noise is considered analytically. Upon application of a tilting force the particles exhibit anomalous transport properties, namely, absolute negative mobility, negative differential mobility, and the phenomenon of hypersensitive differential response. It is established that the mobility (differential mobility included) depends nonmonotonically on the parameters (switching rate, amplitude, and temperature) of nonequilibrium and thermal noises. The necessary conditions for various anomalous transport properties are found.
分析了一维周期系统中具有简单对称锯齿势的布朗粒子在无偏热噪声和空间非均匀三能级色噪声作用下的过阻尼运动。施加倾斜力后，粒子表现出反常输运特性，即绝对负迁移率、负微分迁移率和超灵敏微分响应现象。结果表明，迁移率（包括微分迁移率）非单调地依赖于非平衡噪声和热噪声的参数（开关速率、幅度和温度）。找到了各种反常输运特性的必要条件。
