The Glassy Wormlike Chain

Details The Glassy Wormlike Chain The Glassy Wormlike Chain

2007-05-03

arxiv.org/abs/0705.0490v3

New J. Phys. 9:416 (2007)

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 8 figures. Minor corrections

Scientific paper

10.1088/1367-2630/9/11/416

We introduce a new model for the dynamics of a wormlike chain in an environment that gives rise to a rough free energy landscape, which we baptise the glassy wormlike chain. It is obtained from the common wormlike chain by an exponential stretching of the relaxation spectrum of its long-wavelength eigenmodes, controlled by a single stretching parameter. Predictions for pertinent observables such as the dynamic structure factor and the microrheological susceptibility exhibit the characteristics of soft glassy rheology and compare favourably with experimental data for reconstituted cytoskeletal networks and live cells. We speculate about the possible microscopic origin of the stretching, implications for the nonlinear rheology, and the potential physiological significance of our results.

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