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Radiationless travelling waves in saturable nonlinear Schrödinger lattices

Research output: Working paperWorking paper and Preprints

Original languageEnglish
Publication date30 Mar 2006


The longstanding problem of moving discrete breathers (intrinsic localised modes) in nonlinear Schrödinger lattices is revisited. The context is photorefractive crystal lattices with saturable nonlinearity whose generalised Peierls-Nabarro barrier vanishes for isolated coupling strength values. Genuinely localised travelling waves (i.e., moving discrete breathers) are computed as a function of the system parameters for the first time. The relevant solutions exist only for finite velocities.

Research areas

  • nonlinear Schrödinger lattices, photorefractive, localised travelling wave, embedded soliton



  • Arctex5

    Preprint (usually an early version) , 444 KB, PDF-document

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