The distribution function of a semiflexible polymer and random walks with constraints

Details The distribution function of a semiflexible polymer and random walks with constraints The distribution function of a semiflexible polymer and random walks with constraints

2002-06-18

arxiv.org/abs/cond-mat/0206338v2

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 2 figures, added a reference

Scientific paper

10.1209/epl/i2002-00253-5

In studying the end-to-end distribution function $G(r,N)$ of a worm like chain by using the propagator method we have established that the combinatorial problem of counting the paths contributing to $G(r,N)$ can be mapped onto the problem of random walks with constraints, which is closely related to the representation theory of the Temperley-Lieb algebra. By using this mapping we derive an exact expression of the Fourier-Laplace transform of the distribution function, $G(k,p)$, as a matrix element of an inverse of an infinite rank matrix. Using this result we also derived a recursion relation permitting to compute $G(k,p)$ directly. We present the results of the computation of $G(k,N)$ and its moments. The moments $$ of $% G(r,N)$ can be calculated \emph{exactly} by calculating the (1,1) matrix element of $2n$-th power of a truncated matrix of rank $n+1$.

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