Anomalous energy transport in FPU-\(\beta\) chain
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Publication:513145
DOI10.1007/S10955-015-1273-2zbMATH Open1360.82082arXiv1411.5246OpenAlexW3098428960MaRDI QIDQ513145
Author name not available (Why is that?)
Publication date: 3 March 2017
Published in: (Search for Journal in Brave)
Abstract: This paper is devoted to the derivation of a macroscopic fractional diffusion equation describing heat transport in an anharmonic chain. More precisely, we study here the so-called FPU- chain, which is a very simple model for a one-dimensional crystal in which atoms are coupled to their nearest neighbors by a harmonic potential, weakly perturbed by a quartic potential. The starting point of our mathematical analysis is a kinetic equation: Lattice vibrations, responsible for heat transport, are modeled by an interacting gas of phonons whose evolution is described by the Boltzmann Phonon Equation. Our main result is the rigorous derivation of an anomalous diffusion equation starting from the linearized Boltzmann Phonon Equation
Full work available at URL: https://arxiv.org/abs/1411.5246
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