Approximation of Polyatomic FPU Lattices by KdV Equations
Approximation of Polyatomic FPU Lattices by KdV Equations
复制标题
通过 KdV 方程逼近多原子 FPU 晶格
DOI:
10.1137/130941638
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Qimin Zhang
中科院分区:
文献类型:
--
作者:
J. Gaison;Shari Moskow;J. D. Wright;Qimin Zhang
We consider the evolution of small amplitude, long wavelength initial data by a polyatomic Fermi--Pasta--Ulam lattice differential equation whose material properties vary periodically. Using the methods of homogenization theory, we prove rigorous estimates that show that the solution breaks up into the linear superposition of two appropriately scaled and modulated counter-propagating waves, each of which solves a Korteweg--de Vries equation, plus a small error. The estimates are valid over very long time scales.
DOI:
10.3934/dcdss.2012.5.879
发表时间:
2012
期刊:
Discrete and Continuous Dynamical Systems - Series S
影响因子:
--
作者:
Martina Chirilus-Bruckner;Christopher Chong;Oskar Prill;Guido Schneider
通讯作者:
Guido Schneider