Plectoneme creation reduces the rotational friction of a polymer

Details Plectoneme creation reduces the rotational friction of a polymer Plectoneme creation reduces the rotational friction of a polymer

2009-10-08

arxiv.org/abs/0910.1501v1

EPL 87, 38001 (2009)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

The torsional dynamics of a semiflexible polymer with a contour length $L$ larger than its persistence length L_p that is rotated at fixed frequency omega_0 at one end is studied by scaling arguments and hydrodynamic simulations. We find a non-equilibrium transition at a critical frequency omega_*: In the linear regime, omega_0 < omega_*, axial spinning is the dominant dissipation mode. In the non-linear regime, omega_0 > omega_*, the twist-dissipation mode involves the continuous creation of plectonemes close to the driven end and the rotational friction is substantially reduced.

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