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Statistical approach of the modulational instability of the discrete self-trapping equation

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  • A. Visinescu
  • D. Grecu

Abstract

The discrete self-trapping equation (DST) represents an useful model for several properties of one-dimensional nonlinear molecular crystals. The modulational instability of DST equation is discussed from a statistical point of view, considering the oscillator amplitude as a random variable. A kinetic equation for the two-point correlation function is written down, and its linear stability is studied. Both a Gaussian and a Lorentzian form for the initial unperturbed wave spectrum are discussed. Comparison with the continuum limit (NLS equation) is carried out. Copyright Springer-Verlag Berlin/Heidelberg 2003

Suggested Citation

  • A. Visinescu & D. Grecu, 2003. "Statistical approach of the modulational instability of the discrete self-trapping equation," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 34(2), pages 225-229, July.
    • Handle: RePEc:spr:eurphb:v:34:y:2003:i:2:p:225-229
    DOI: 10.1140/epjb/e2003-00215-3
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