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...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Published: |
IOP
2007
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/924/ |