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Published on: May 19, 2014
Thermal fluctuations of elastic filaments with spontaneous curvature and torsion
1Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel.
Abstract:
We study the effects of thermal fluctuations on thin elastic filaments with spontaneous curvature and torsion. We derive analytical expressions for the orientational correlation functions and for the persistence length of helices and find that this length varies nonmonotonically with the strength of thermal fluctuations. In the weak fluctuation regime, the persistence length of a spontaneously twisted helix has three resonance peaks as a function of the twist rate. In the limit of strong fluctuations, all memory of the helical shape is lost.
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