Journal of Statistical Physics

, Volume 170, Issue 3, pp 642–651 | Cite as

Elasticity of a Filament with Kinks

  • Mohammadhosein RazbinEmail author


Using the wormlike chain model, we analytically study the elasticity of a filament with kinks. We calculate the position probability density function and the force constant of a kinked filament with a general kink angle. Then, using the mathematical induction, we obtain the positional-orientational probability density function of a filament with regular kinks. For this filament, we compute the force constant in two different directions. In longitudinal direction of the filament, the force constant is proportional to the inverse of the number of the segments, i.e., 1 / m, while in transverse direction, it is proportional to \(1/m^3\).


Semiflexible filament Wormlike chain model Kink 



We thank the DFG for financial support through SFB 937, project A1. Also, we thank Annette Zippelius for the useful comments.


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Authors and Affiliations

  1. 1.Institute for Theoretical PhysicsGeorg August UniversityGöttingenGermany
  2. 2.Institute of Biochemistry and BiophysicsUniversity of TehranTehranIran

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