Unwinding relaxation dynamics of polymers.

نویسندگان

  • J-C Walter
  • M Baiesi
  • G T Barkema
  • E Carlon
چکیده

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.

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ar X iv : 1 30 1 . 27 77 v 1 [ co nd - m at . s of t ] 1 3 Ja n 20 13 Unwinding relaxation dynamics of polymers

J.-C. Walter, 2 M. Baiesi, 4 G. T. Barkema, 1 and E. Carlon Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands Institute for Theoretical Physics, KULeuven, Celestijnenlaan 200D, Leuven, Belgium Dipartimento di Fisica e Astronomia, Università di Padova, Via Marzolo 8, Padova, Italy INFN, Sezione di Padova, Via Marzolo 8, Padova, Italy Institute for Theoretical...

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عنوان ژورنال:
  • Physical review letters

دوره 110 6  شماره 

صفحات  -

تاریخ انتشار 2013