Uniform asymptotic expansions for the infinite harmonic chain

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Date
2013
Volume
1846
Issue
Journal
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Publisher
Berlin : Weierstraß-Institut für Angewandte Analysis und Stochastik
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Abstract

We study the dispersive behavior of waves in linear oscillator chains. We show that for general general dispersions it is possible to construct an expansion such that the remainder can be estimated by 1/t uniformly in space. In particalur we give precise asymptotics for the transition from the 1/t1/2 decay of nondegenerate wave numbers to the generate 1/t1/3 decay of generate wave numbers. This involves a careful description of the oscillatory integral involving the Airy function.

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Keywords
Asymptotic analysis, oscillatory integrals, Fermi–Pasta–Ulam chain, Airy function, dispersive decay, method of stationary phase, Oszillatorische Differentialgleichung, Nichtlineares dynamisches System
Citation
Mielke, A., & Patz, C. (2013). Uniform asymptotic expansions for the infinite harmonic chain (Vol. 1846). Berlin : Weierstraß-Institut für Angewandte Analysis und Stochastik.
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This document may be downloaded, read, stored and printed for your own use within the limits of § 53 UrhG but it may not be distributed via the internet or passed on to external parties.
Dieses Dokument darf im Rahmen von § 53 UrhG zum eigenen Gebrauch kostenfrei heruntergeladen, gelesen, gespeichert und ausgedruckt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.