%0 Conference Paper
%F Oral 
%T Unwinding relaxation dynamics of a polymer: a model for single bio-macromolecules ?
%+ Laboratoire Charles Coulomb (L2C)
%A Walter, Jean-Charles
%< sans comité de lecture
%Z L2C:14-426
%B The Physics of Soft and Biological Matter
%C Cambridge, United Kingdom
%8 2014-04-15
%D 2014
%Z Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph]Conference papers
%X The relaxation dynamics of a polymer wound around a fixed obstacle constitutes a fundamental instance of polymer with twist and torque, and it is also of relevance for DNA denaturation dynamics. We investigate it by simulations and Langevin equation analysis. The latter predicts a relaxation time scaling as a power of the polymer length times a logarithmic correction related to the equilibrium fluctuations of the winding angle. The numerical data support this result and show that at short times the winding angle decreases as a power law. This is also in agreement with the Langevin equation provided a winding-dependent friction is used, suggesting that such reduced description of the system captures the basic features of the problem.
%G English
%L hal-01955881
%U https://hal.science/hal-01955881
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021