Perturbation-induced radiation by the Ablowitz-Ladik soliton.
An efficient formalism is elaborated to analytically describe dynamics of the Ablowitz-Ladik soliton in the presence of perturbations. This formalism is based on using the Riemann-Hilbert problem and provides the means of calculating evolution of the discrete soliton parameters, as well as shape distortion and perturbation-induced radiation effects. As an example, soliton characteristics are calculated for linear damping and quintic perturbations.
Doktorov
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EV
B.I. Stepanov Institute of Physics, 68 F. Skaryna Avenue, 220072 Minsk, Belarus. doktorov@dragon.bas-net.by
Matsuka
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NP
Rothos
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VM