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Radiationless travelling waves in saturable nonlinear Schrödinger lattices

Research output: Working paperWorking paper and Preprints

Original languageEnglish
StatePublished - 30 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

    Submitted manuscript, 444 KB, PDF-document


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