Exact Statistics of Helical Wormlike Chains with Twist-Bend Coupling

Kavli Affiliate: David T. Limmer

| First 5 Authors: Ashesh Ghosh, Kranthi K. Mandadapu, David T. Limmer, ,

| Summary:

We present a solution for the Green’s function for the general case of a
helical wormlike chain with twist-bend coupling, and demonstrate the
applicability of our solution for evaluating general structural and mechanical
chain properties. We find that twist-bend coupling renormalizes the persistence
length and the force-extension curves relative to worm-like chains. Analysis of
intrinsically twisted polymers shows that incorporation of twist-bend coupling
results in the oscillatory behavior in principal tangent correlations that are
observed in some studies of synthetic polymers. The exact nature of our
solution provides a framework to evaluate the role of twist-bend coupling on
polymer properties and motivates the reinterpretation of existing bio-polymer
experimental data.

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