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Título: | Translocation dynamics of a short polymer driven by an oscillating force |
Autor: | Pizzolato, Nicola; Fiasconaro, Alessandro CSIC ORCID; Persano Adorno, Dominique; Spagnolo, Bernardo | Fecha de publicación: | 2013 | Editor: | American Institute of Physics | Citación: | Journal of Chemical Physics 138(5): 054902 (2013) | Resumen: | We study the translocation dynamics of a short polymer moving in a noisy environment and driven by an oscillating force. The dynamics is numerically investigated by solving a Langevin equation in a two-dimensional domain. We consider a phenomenological cubic potential with a metastable state to model the polymer-pore interaction and the entropic free energy barrier characterizing the translocation process. The mean first translocation time of the center of inertia of polymers shows a nonmonotonic behavior, with a minimum, as a function of the number of the monomers. The dependence of the mean translocation time on the polymer chain length shows a monotonically increasing behavior for high values of the number of monomers. Moreover, the translocation time shows a minimum as a function of the frequency of the oscillating forcing field for all the polymer lengths investigated. This finding represents the evidence of the resonant activation phenomenon in the dynamics of polymer translocation, whose occurrence is maintained for different values of the noise intensity. © 2013 American Institute of Physics. | Descripción: | Under the terms of the Creative Commons Attribution 3.0 Unported License. | Versión del editor: | http://dx.doi.org/10.1063/1.4789016 | URI: | http://hdl.handle.net/10261/74305 | DOI: | 10.1063/1.4789016 | Identificadores: | doi: 10.1063/1.4789016 issn: 0021-9606 e-issn: 1089-7690 |
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