Discrete breathers in a two-dimensional
hexagonal Fermi-Pasta-Ulam lattice

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Discrete breathers in a two-dimensional hexagonal Fermi-Pasta-Ulam lattice

We consider a two-dimensional Fermi-Pasta-Ulam (FPU) lattice with hexagonal symmetry. Using asymptotic methods based on small amplitude ansatz, at third order we obtain a eduction to a cubic nonlinear Schr{\"o}dinger equation (NLS) for the breather envelope. However, this does not support s...

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Bibliographic Details
Main Authors:	Butt, Imran A., Wattis, Jonathan A.D.
Format:	Article
Published:	IOP 2007
Subjects:	Fermi-Pasta-Ulam lattice breathers
Online Access:	https://eprints.nottingham.ac.uk/924/

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