期刊
PHYSICA D-NONLINEAR PHENOMENA
卷 210, 期 1-2, 页码 138-148出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physd.2005.07.011
关键词
dissipative soliton; vortex; complex Ginzburg-Landau equation
Motions of pulses and vortices are numerically studied with the cubic-quintic complex Ginzburg-Landau equation without viscous terms. There exist moving pulses and vortices with any velocities, because the equation is invariant for the Galilei transformation. We study mutual collisions of counter-propagating pulses and vortices, and motions of pulses and vortices in external potentials. Moving pulses and vortices pass through a potential wall like a tunnel effect. If some viscous terms are included, the model equation is equivalent to the quintic complex Swift-Hohenberg equation. We find a supercritical bifurcation from a stationary pulse to a moving pulse. (c) 2005 Elsevier B.V. All rights reserved.
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