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Coherence–incoherence transition in nonlinear wave interactions

Published online by Cambridge University Press:  13 January 2005

M. FRICHEMBRUDER ,
R. PAKTER  and
F. B. RIZZATO
M. FRICHEMBRUDER
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970 Porto Alegre, Rio Grande do Sul, Brasil (rizzato@if.ufrgs.br)
R. PAKTER
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970 Porto Alegre, Rio Grande do Sul, Brasil (rizzato@if.ufrgs.br)
F. B. RIZZATO
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970 Porto Alegre, Rio Grande do Sul, Brasil (rizzato@if.ufrgs.br)
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Abstract

In this paper we analyze the transition from coherent to incoherent wave dynamics in a broad-band triplet interaction, where, in contrast to previous models, wave vector selection rules are imposed on the nonlinear terms of the governing equations. As a general rule, nonlinear terms induce coherence via a phase-locking process. However, wave vector spread also results from nonlinearity and can affect coherence when resonant modes are excited.

Type
Papers
Information
Journal of Plasma Physics , Volume 71 , Issue 1 , February 2005 , pp. 11 - 21
Copyright
2005 Cambridge University Press

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