Suppression of the generation of defect modes by a moving soliton in an inhomogeneous Toda lattice.
The motion of solitons is studied in the Toda lattice with a local defect due to a change in coupling constants. We demonstrate that the generation of the trapped defect mode by the incident soliton is strongly suppressed under a certain condition. The effect is explained by the fact that, under this condition, the defect mode vanishes in the linear limit. In the same case, the soliton remains stable, traveling through a periodic array of defects; otherwise, it decays.
Vergara
Lautaro
L
Departamento de Física, Universidad de Santiago de Chile, Casilla 307, Santiago 2, Chile. lvergara@lauca.usach.cl
Malomed
Boris A
BA