An oriented process induced by dynamically regulated energy barriers

Details An oriented process induced by dynamically regulated energy barriers An oriented process induced by dynamically regulated energy barriers

2004-05-02

arxiv.org/abs/cond-mat/0405017v1

Physics

Condensed Matter

Statistical Mechanics

6 pages, 6 figures

Scientific paper

10.1143/JPSJ.74.1653

A novel mechanism for the appearance of oriented processes is investigated with a flexible dynamical system overcoming barriers. Under non-equilibrium condition with external driving, reaction paths deviate from that at equilibrium with an accompanying violation of symmetry between the forward and the reverse paths. Although we never introduce any external switching of potentials to generate the oriented processes, multi-dimensional flexible dynamics promote the oriented processes through this symmetry violation. Along the reaction paths, bottleneck points are proposed as a rate-controlling factor, which determine the {\it direction-dependent activation energies} satisfying Arrhenius-like law for the rate constants. In comparison, in stiff systems, the oriented process is suggested to appear in different manner from this scenario.

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