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Artículo
Moving discrete breathers in a Klein–Gordon chain with an impurity
Autor/es | Cuevas-Maraver, Jesús
Palmero Acebedo, Faustino Archilla, Juan F. R. Romero Romero, Francisco |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada I Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2002 |
Fecha de depósito | 2015-04-17 |
Publicado en |
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Resumen | We analyse the influence of an impurity in the evolution of moving discrete breathers in a Klein–Gordon chain with non-weak nonlinearity. Three different types of behaviour can be observed when moving breathers interact ... We analyse the influence of an impurity in the evolution of moving discrete breathers in a Klein–Gordon chain with non-weak nonlinearity. Three different types of behaviour can be observed when moving breathers interact with the impurity: they pass through the impurity continuing their direction of movement; they are reflected by the impurity; they are trapped by the impurity, giving rise to chaotic breathers, as their Fourier power spectra show. Resonance with a breather centred at the impurity site is conjectured to be a necessary condition for the appearance of the trapping phenomenon. This paper establishes a difference between the resonance condition of the non-weak nonlinearity approach and the resonance condition with the linear impurity mode in the case of weak nonlinearity. |
Agencias financiadoras | European Commission (EC) |
Identificador del proyecto | info:eu-repo/grantAgreement/EC/FP5/HPRN-CT-1999-00163 |
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