2014/05/31 by P. M. Suhonen, Kimmo Kaski, K. Kaski +1 · 2 citations
Biochemistry, Genetics and Molecular Biology · Chemistry · Engineering · Mathematics · Physics and Astronomy · #Advanced NMR Techniques and Applications #Chemistry #Chromosomal translocation #Exponent #Fuel Cells and Related Materials #Geometry #Langevin dynamics #Mathematics #Nanopore and Nanochannel Transport Studies #Nuclear magnetic resonance #Physics #Polymer #Scaling #Statistical physics #cond-mat.soft #physics.bio-ph #q-bio.BM
paper · pdf · doi:10.1103/physreve.90.042702
published as Phys. Rev. E 90, 042702 (2014) · 8 pages, 8 figures
openalex publication_date 2014/10/06 · arxiv created 2017/12/15 · arxiv updated 2017/12/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
While the characteristics of the driven translocation for asymptotically long polymers are well understood, this is not the case for finite-sized polymers, which are relevant for real-world experiments and simulation studies. Most notably, the behavior of the exponent α, which describes the scaling of the translocation time with polymer length, when the driving force fp in the pore is changed, is under debate. By Langevin dynamics simulations of regular and modified translocation models using the freely jointed-chain polymer model we find that a previously reported incomplete model, where the trans side and fluctuations were excluded, gives rise to characteristics that are in stark contradiction with those of the complete model, for which α increases with fp. Our results suggest that contribution due to fluctuations is important. We construct a minimal model where dynamics is completely excluded to show that close alignment with a full translocation model can be achieved. Our findings set very stringent requirements for a minimal model that is supposed to describe the driven polymer translocation correctly.