2006/10/24 by Debabrata Panja, Gerard T. Barkema, G. T. Barkema +5 · 1 citation
Biochemistry, Genetics and Molecular Biology · Engineering · Physics and Astronomy · #Biological Physics (physics.bio-ph) #Biomolecules (q-bio.BM) #DNA and Nucleic Acid Chemistry #FOS: Biological sciences #FOS: Physical sciences #Lipid Membrane Structure and Behavior #Nanopore and Nanochannel Transport Studies #Soft Condensed Matter (cond-mat.soft) #Statistical Mechanics (cond-mat.stat-mech) #cond-mat.soft #cond-mat.stat-mech #physics.bio-ph #q-bio.BM
paper · pdf · doi:10.48550/arxiv.cond-mat/0610671
Significantly rewritten; 9 pages, 7 figures (8 figure files)
openalex publication_date 2006/10/24 · arxiv created 2007/07/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we investigate the microscopic dynamics of a polymer of length N translocating through a narrow pore. Characterization of its purportedly anomalous dynamics has so far remained incomplete. We show that the polymer dynamics is anomalous until the Rouse time τR∼ N1+2ν, with a mean square displacement through the pore consistent with t(1+ν)/(1+2ν), with ν≈0.588 the Flory exponent. This is shown to be directly related to a decay in time of the excess monomer density near the pore as t-(1+ν)/(1+2ν)exp(-t/τR). Beyond the Rouse time translocation becomes diffusive. In consequence of this, the dwell-time τd, the time a translocating polymer typically spends within the pore, scales as N2+ν, in contrast to previous claims.