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Dynamical properties of single-file diffusion

Abstract : We study the statistics of a tagged particle in single-file diffusion, a one-dimensional interacting infinite-particle system in which the order of particles never changes. We compute the two-time correlation function for the displacement of the tagged particle for an arbitrary single-file system. We also discuss single-file analogs of the arcsine law and the law of the iterated logarithm characterizing the behavior of Brownian motion. Using a macroscopic fluctuation theory we devise a formalism giving the cumulant generating functional. In principle, this functional contains the full statistics of the tagged particle trajectory---the full single-time statistics, all multiple-time correlation functions, etc. are merely special cases.
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P. L. Krapivsky, Kirone Mallick, Tridib Sadhu. Dynamical properties of single-file diffusion. Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing, 2015, 2015, pp.09007. ⟨10.1088/1742-5468/2015/09/P09007⟩. ⟨cea-01304779⟩

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