Radiationless Travelling Waves In Saturable Nonlinear Schrödinger Lattices

Abstract

The longstanding problem of moving discrete solitary waves in nonlinear Schr{ö}dinger lattices is revisited. The context is photorefractive crystal lattices with saturable nonlinearity whose grand-canonical energy barrier vanishes for isolated coupling strength values. {\em Genuinely localised travelling waves} are computed as a function of the system parameters {\it for the first time}. The relevant solutions exist only for finite velocities.

5 pages, 4 figures

References in corpus (1)

• Nonintegrable Schrodinger Discrete Breathers

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