Interaction of discrete nonlinear Schrodinger solitons with a linear lattice impurity

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Valeriy A Brazhnyi (Autor) FCUP; Chandroth P Jisha (Autor) Outra; Rodrigues, AS (Autor) FCUP

Revista

Título: Physical Review A - Atomic, Molecular, and Optical Physics

Vol. 87

ISSN: 1050-2947

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 11 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

CORDIS: Ciências Físicas > Física

Outras Informações

ID Authenticus: P-002-19W

DOI: 10.1103/physreva.87.013609

Abstract (EN): The interaction of moving discrete solitons with a linear Gaussian defect is investigated. Solitons with profiles varying from hyperbolic secant to exponentially localized are considered such that the mobility of soliton is maintained; the condition for which is obtained. Studies on scattering of the soliton by an attractive defect potential reveal the existence of total reflection and transmission windows which become very narrow with increasing initial soliton amplitude. Transmission regions disappear beyond the small-amplitude limit. The regions of complete reflection and partial capture correspond to the windows of the existence and nonexistence of solution of the stationary problem. Interaction of the discrete soliton with a barrier potential is also investigated. The critical amplitude of the defect at which splitting of the soliton into two parts occurs was estimated from a balance equation. The results were confirmed through direct numerical integration of the dynamical equation showing very good agreement with the analytical prediction. DOI: 10.1103/PhysRevA.87.013609

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8