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Soliton propagation in a random medium has been numerically studied. As a model of the system, we consider a one-dimensional Toda lattice where two different mass particles are distributed randomly but the interaction potential is uniform. It is shown that the amplitude of a soliton decreases as n -1 ∼ n -1.2 ( n denotes the lattice point) in the course of propagation and that the damping is enhanced with soliton amplitude. The possibility of soliton damping with hysteresis is suggested.
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Ishiwata et al. (1990) studied this question.
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