Ref HAL: hal-00872108_v1
Ref Arxiv: 1301.2777
DOI: 10.1103/PhysRevLett.110.068301
WoS: 000314686700013
Ref. & Cit.: NASA ADS
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14 Citations
Résumé:

The relaxation dynamics of a polymer wound around a fixed obstacle constitutes a fundamental instance of polymer with twist and torque and it is of relevance also 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.

Commentaires: 4 pages, 5 figures, published in Phys. Rev. Lett. 110, 068301 (2013)