ANALYTICAL PROOF OF SPACE-TIME CHAOS IN GINZBURG-LANDAU EQUATIONS

被引:10
|
作者
Turaev, Dmitry [1 ]
Zelik, Sergey [2 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2AZ, England
[2] Univ Surrey, Dept Math, Surrey GU27XH, England
关键词
extended systems; attractors of PDE's inunbounded domains; multi-pulse solutions; normal hyperbolicity; center-manifold reduction; soliton interaction; lattice dynamical systems; REACTION-DIFFUSION SYSTEMS; ATTRACTORS; REDUCTION; DOMAINS;
D O I
10.3934/dcds.2010.28.1713
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We prove that the attractor of the 1D quintic complex Ginzburg-Landau equation with a broken phase symmetry has strictly positive space-time entropy for an open set of parameter values. The result is obtained by studying chaotic oscillations in grids of weakly interacting solitons in a class of Ginzburg-Landau type equations. We provide an analytic proof for the existence of two soliton configurations with chaotic temporal behavior, and construct solutions which are closed to a grid of such chaotic soliton pairs, with every pair in the grid well spatially separated from the neighboring ones for all time. The temporal evolution of the well-separated multi-soliton structures is described by a weakly coupled lattice dynamical system (LDS) for the coordinates and phases of the solitons. We develop aversion of normal hyperbolicity theory for the weakly coupled LDS's with continuous time and establish for them the existence of space-time chaotic patterns similar to the Sinai-Bunimovich chaos in discrete-time LDS's. While the LDS part of the theory may be of independent interest, the main difficulty addressed in the paper concerns with lifting the space-time chaotic solutions of the LDS back to the initial PDE. The equations we consider here are space-time autonomous, i.e. we impose no spatial or temporal modulation which could prevent the individual solitons in the grid from drifting towards each other and destroying the well-separated grid structure in a finite time. We however manage to show that the set of space-time chaotic solutions for which the random soliton drift is arrested is large enough, so the corresponding space-time entropy is strictly positive.
引用
收藏
页码:1713 / 1751
页数:39
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