Entangled dynamics of a stiff polymer 1/2

Entangled networks of stiff biopolymers exhibit complex dynamic
response, emerging from the topological constraints that
neighboring filaments impose upon each other. We propose a class of
reference models for entanglement dynamics of stiff polymers and
provide a quantitative foundation of the tube concept for stiff
polymers. For an infinitely thin needle exploring a planar course
of point obstacles, we have performed large-scale computer
simulations proving the conjectured scaling relations from the fast
transverse equilibration to the slowest process of orientational
relaxation. We determine the rotational diffusion coefficient of
the tracer, its angular confinement, the tube diameter, and the
orientational correlation functions.