Quasi-Solitons in Dissipative Systems and Exactly Solvable Lattice Models

Nonlinear Sciences – Pattern Formation and Solitons

Scientific paper

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REVTeX, 4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.83.718

A system of first-order differential-difference equations with time lag describes the formation of density waves, called as quasi-solitons for dissipative systems in this paper. For co-moving density waves, the system reduces to some exactly solvable lattice models. We construct a shock-wave solution as well as one-quasi-soliton solution, and argue that there are pseudo-conserved quantities which characterize the formation of the co-moving waves. The simplest non-trivial one is given to discuss the presence of a cascade phenomena in relaxation process toward the pattern formation.

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