title: Shapes of semiflexible polymer rings.
abstract: The shape of semiflexible polymer rings is studied over their whole range of flexibility. Investigating the joint distribution of asphericity and the nature of asphericity as well as their respective averages, we find two distinct shape regimes depending on the flexibility of the polymer. For a small perimeter to persistence length the fluctuating rings exhibit only planar, elliptical configurations. At higher flexibilities three-dimensional, crumpled structures arise. Analytic calculations confirm the qualitative behavior of the averaged shape parameters and the elliptical shape in the stiff regime.
authors.affiliation: Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Department of Physics, Ludwig-Maximilians-Universität München, Theresienstrasse 37, D-80333, München, Germany.
authors.forename: Karen
authors.initials: K
authors.lastname: Alim
authors.forename: Erwin
authors.initials: E
authors.lastname: Frey
mesh_terms: D001696:Biomechanical Phenomena; D003198:Computer Simulation; D004247:DNA / Q000737:chemistry; D008956:Models, Chemical; D008968:Molecular Conformation; D009010:Monte Carlo Method; D011108:Polymers / Q000737:chemistry*
chemical_list: D011108:Polymers; D004247:DNA