Exact solutions for domain walls in coupled complex Ginzburg-Landau equations

Tat Leung YEE, A. C. H. TSANG, Boris A. MALOMED, Wok Wing CHOW

Research output: Contribution to journalArticles

3 Citations (Scopus)

Abstract

The complex Ginzburg-Landau equation (CGLE) is a ubiquitous model for the evolution of slowly varying wave packets in nonlinear dissipative media. A front (shock) is a transient layer between a plane-wave state and a zero background. We report exact solutions for domain walls, i.e., pairs of fronts with opposite polarities, in a system of two coupled CGLEs, which describe transient layers between semi-infinite domains occupied by each component in the absence of the other one. For this purpose, a modified Hirota bilinear operator, first proposed by Bekki and Nozaki, is employed. A novel factorization procedure is applied to reduce the intermediate calculations considerably. The ensuing system of equations for the amplitudes and frequencies is solved by means of computer-assisted algebra. Exact solutions for mutually-locked front pairs of opposite polarities, with one or several free parameters, are thus generated. The signs of the cubic gain/loss, linear amplification/attenuation, and velocity of the coupled-front complex can be adjusted in a variety of configurations. Numerical simulations are performed to study the stability properties of such fronts. Copyright © 2011 The Physical Society of Japan. The article is available at : http://jpsj.ipap.jp/link?JPSJ/80/064001/
Original languageEnglish
Article number064001
JournalJournal of the Physical Society of Japan
Volume80
Issue number6
DOIs
Publication statusPublished - Jun 2011

Citation

Yee, T. L., Tsang, A. C. H., Malomed, B., & Chow, W. W. (2011). Exact solutions for domain walls in coupled complex Ginzburg-Landau equations. Journal of the Physical Society of Japan, 80(6), art. No. 064001.

Keywords

  • Bekki-Nozaki modified Hirota bilinear operator
  • Complex Ginzburg-Landau equations
  • Fronts
  • Kinks
  • Shocks

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