Breather mobility in discrete φ4 nonlinear lattices

Chen Ding, S. Aubry, G. P. Tsironis

Research output: Contribution to journalArticlepeer-review

184 Citations (Scopus)

Abstract

We introduce a systematic approach to investigate movability properties of localized excitations in discrete nonlinear lattice systems and apply it to φ4 lattices. Starting from the anticontinuous limit, we construct localized breather solutions that are shown to be linearly stable and to possess a pinning mode in the double well case. We demonstrate that an appropriate perturbation of the pinning mode yields a systematic method for constructing moving breathers with a minimum shape alteration. We find that the breather mobility improves with lower mode frequency. We analyze properties of the breather motion and determine its effective mass.

Original languageEnglish
Pages (from-to)4776-4779
Number of pages4
JournalPhysical Review Letters
Volume77
Issue number23
DOIs
Publication statusPublished - Jan 1 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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