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29 March 2024
 
  » arxiv » nlin.PS/0203026

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Moving discrete breathers in a Klein--Gordon chain with an impurity
J. Cuevas ; F. Palmero ; J.F.R. Archilla ; F.R. Romero ;
Date 14 Mar 2002
Journal J. Phys A: Math. Gen. 35 (2002) 10519
Subject Pattern Formation and Solitons | nlin.PS
AbstractWe analyze the influence of an impurity in the movement of discrete breathers in Klein--Gordon chains. We observe that the moving breather can cross the impurity, can be reflected by it, or can be trapped originating a quasi-periodic breather. We find that resonance with a nonlinear localised mode centred in the impurity is a necessary condition in order to observe the trapping phenomenon, as a difference with the resonance condition with a linear localised mode when this problem is studied within the Nonlinear Schrödinger Equation approximation.
Source arXiv, nlin.PS/0203026
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