Stretching semiflexible filaments with quenched disorder
Abstract
We study the effect of quenched randomness in the arc-length dependent spontaneous curvature of a wormlike chain under tension. In the weakly bending approximation in two dimensions, we obtain analytic results for the force-elongation curve and the width of transverse fluctuations. We compare quenched and annealed disorder and conclude that the former cannot always be reduced to a simple change in the stiffness of the pure system. We also discuss the effect of a random transverse force on the stretching response of a wormlike chain without spontaneous curvature.
- Publication:
-
Physical Review E
- Pub Date:
- November 2010
- DOI:
- arXiv:
- arXiv:1006.3698
- Bibcode:
- 2010PhRvE..82e0802B
- Keywords:
-
- 36.20.Ey;
- 87.15.ad;
- 82.37.Rs;
- Conformation;
- Analytical theories;
- Single molecule manipulation of proteins and other biological molecules;
- Condensed Matter - Soft Condensed Matter;
- Condensed Matter - Disordered Systems and Neural Networks;
- Quantitative Biology - Biomolecules
- E-Print:
- 5 pages, minor changes, added references, final version as published in PRE