Event distributions of polymer translocation

Details Event distributions of polymer translocation Event distributions of polymer translocation

2011-12-21

arxiv.org/abs/1112.5091v3

Physical Review E, Vol. 85, 041910 (2012)

Physics

Condensed Matter

Soft Condensed Matter

Second revision. 7 pages, 8 figures

Scientific paper

10.1103/PhysRevE.85.041910

We present event distributions for the polymer translocation obtained by extensive Langevin dynamics simulations. Such distributions have not been reported previously and they provide new understanding of the stochastic characteristics of the process. We extract at a high length scale resolution distributions of polymer segments that continuously traverse through a nanoscale pore. The obtained log-normal distributions together with the characteristics of polymer translocation suggest that it is describable as a multiplicative stochastic process. In spite of its clear out-of-equilibrium nature the forced translocation is surprisingly similar to the unforced case. We find forms for the distributions almost unaltered with a common cut-off length. We show that the individual short-segment and short-time movements inside the pore give the scaling relations $\tau \sim N^\alpha$ and $\tau \sim f^{-\beta}$ for the polymer translocation.

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