Diffusion over an entropic barrier: Non-Arrhenius behavior

Mondal, Debasish ; Ray, Deb Shankar (2010) Diffusion over an entropic barrier: Non-Arrhenius behavior Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 82 (3). 032103_1-032103_4. ISSN 1539-3755

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Official URL: http://pre.aps.org/abstract/PRE/v82/i3/e032103

Related URL: http://dx.doi.org/10.1103/PhysRevE.82.032103


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.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:59135
Deposited On:03 Sep 2011 12:05
Last Modified:03 Sep 2011 12:05

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