Dynamical Diagram and Scaling in Polymer Driven Translocation

TL;DR

This paper investigates the nonequilibrium dynamics of polymer translocation under driving forces, proposing a scaling framework that accounts for various regimes and finite size effects, enhancing understanding of experimental and simulation results.

Contribution

It extends the tension-propagation model to a broader parameter space and introduces a dynamical scaling scenario analogous to surface growth phenomena.

Findings

Identification of three distinct nonequilibrium regimes

Extension of tension-propagation formulation to real experimental conditions

Highlighting the importance of finite size effects

Abstract

By analyzing the real space nonequilibrium dynamics of polymers, we elucidate the physics of driven translocation and propose its dynamical scaling scenario analogous to that in the surface growth phenomena. We provide a detailed account of the previously proposed tension-propagation formulation and extend it to cover the broader parameter space relevant to real experiments; In addition to a near-equilibrium regime, we identify three distinct nonequilibrium regimes reflecting the steady-state property of a dragged polymer with the finite extensibility. Finite size effects are also pointed out. These elements are shown to be crucial for the appropriate comparison with experiments and simulations.