## Abstract

Every smooth closed curve can be represented by a suitable Fourier sum as a function of an arbitrary parameter τ. We show that the ensemble of curves generated by randomly chosen Fourier coefficients with amplitudes inversely proportional to spatial frequency (with a smooth exponential cutoff) can be accurately mapped on the physical ensemble of inextensible worm-like polymer loops. The τ → s mapping of the curve parameter τ on the arc length s of the inextensible polymer is achieved at the expense of coupling all Fourier harmonics in a non-trivial fashion. We characterize the obtained ensemble of conformations by looking at tangent-tangent and position-position correlations. Measures of correlation on the scale of the entire loop yield a larger persistence length than that calculated from the tangent-tangent correlation function at small length scales. The topological properties of the ensemble, randomly generated worm-like loops, are shown to be similar to those of other polymer models.

Original language | English |
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Article number | L04 |

Pages (from-to) | L507-L513 |

Journal | Journal of Physics A: Mathematical and General |

Volume | 39 |

Issue number | 30 |

DOIs | |

State | Published - 28 Jul 2006 |