Diffusion over an entropic barrier: non-Arrhenius behavior.
Diffusion over an entropic barrier: non-Arrhenius behavior.
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DOI：
10.1103/physreve.82.032103
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发表时间：
2010-09
期刊：
影响因子：
--
通讯作者：
D. Mondal;D. Ray
中科院分区：
文献类型：
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作者：
D. Mondal;D. Ray
本文研究了二维封闭空间中布朗粒子通过狭窄瓶颈在两个不同区域间的噪声诱导逃逸率与温度的关系。不同截面的限制结果在减少的维度在一个有效的熵势垒。观察到逃逸率的强的非Arrhenius依赖性，这可以解释在存在的引力偏置和热运动的相互作用下，熵主导的制度和能量主导的制度之间的交叉。
We have examined the temperature dependence of noise-induced escape rate of brownian particles between two distinct regions in a two-dimensional enclosure through a narrow bottleneck. Varying cross section of the confinement results in an effective entropic barrier in reduced dimension. The strong non-Arrhenius dependence of the escape rate is observed, which can be explained in terms of a crossover between entropy-dominated regime and energy-dominated regime in presence of an interplay of gravitational bias and thermal motion.