Dynamical scaling exponents for polymer translocation through a nanopore

K.K.K. Luo, S.T.T. Ollila, I. Huopaniemi, T. Ala-Nissila, P. Pomorski, M.E.J. Karttunen, S.-C. Ying, A. Bhattacharya

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    Abstract

    We determine the scaling exponents of polymer translocation (PT) through a nanopore by extensive computer simulations of various microscopic models for chain lengths extending up to N=800 in some cases. We focus on the scaling of the average PT time t~Na and the mean-square change of the PT coordinate, ¿s2(t)¿~tß. We find a=1+2¿ and ß=2/a for unbiased PT in two dimensions (2D) and three dimensions (3D). The relation aß=2 holds for driven PT in 2D, with a crossover from a˜2¿ for short chains to a˜1+¿ for long chains. This crossover is, however, absent in 3D where a=1.42±0.01 and aߘ2.2 for N˜40-800.
    Original languageEnglish
    Pages (from-to)050901(R)-1/4
    JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    Volume78
    Issue number5
    DOIs
    Publication statusPublished - 2008

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