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We study the geometry of a semiflexible polymer at finite temperatures. Thewrithe can be calculated from the properties of Gaussian random walks on thesphere. We calculate static and dynamic writhe correlation functions. Thewrithe of a polymer is analogous to geometric or Berry phases studied in opticsand wave mechanics. Our results can be applied to confocal microscopy studiesof stiff filaments and to simulations of short DNA loopsComment: 11 pages with 5 figures. Latex2

Writhing geometry at finite temperature: Random walks and geometric phases for stiff polymers