Noise effects in polymer dynamics

Details Noise effects in polymer dynamics Noise effects in polymer dynamics

2008-10-09

arxiv.org/abs/0810.1582v1

I, Vol. 18, No. 9, 2869 - 2874 (2008)

Physics

Condensed Matter

Statistical Mechanics

6 pages, 5 figures, to appear in Intern. Journ. of Bifurcation and Chaos, 2008

Scientific paper

The study of the noise induced effects on the dynamics of a chain molecule crossing a potential barrier, in the presence of a metastable state, is presented. A two-dimensional stochastic version of the Rouse model for a flexible polymer has been adopted to mimic the molecular dynamics and to take into account the interactions between adjacent monomers. We obtain a nonmonotonic behavior of the mean first passage time and its standard deviation, of the polymer centre of inertia, with the noise intensity. These findings reveal a noise induced effect on the mean crossing time. The role of the polymer length is also investigated.

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