Phonon Scattering by Breathers in the Discrete Nonlinear Schroedinger Equation

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Linear theory for phonon scattering by discrete breathers in the discrete nonlinear Schroedinger equation using the transfer matrix approach is presented. Transmission and reflection coefficients are obtained as a function of the wave vector of the input phonon. The occurrence of a nonzero transmission, which in fact becomes perfect for a symmetric breather, is shown to be connected with localized eigenmodes thresholds. In the weak-coupling limit, perfect reflection are shown to exist, which requires two scattering channels. A necessary condition for a system to have a perfect reflection is also considered in a general context.
13 pages 11 figures in EPS, RevTeX, Phys. Rev. E accepted

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Exactly Solvable and Integrable Systems, Disordered Systems and Neural Networks, Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/94443

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/solv-int/9806007
 http://arxiv.org/abs/solv-int/9806007

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arXiv