Hyperbolic decoupling of tangent space and effective dimension of dissipative systems

Details Hyperbolic decoupling of tangent space and effective dimension of dissipative systems Hyperbolic decoupling of tangent space and effective dimension of dissipative systems

2011-07-13

arxiv.org/abs/1107.2567v1

Nonlinear Sciences

Chaotic Dynamics

21 pages, 30 figures

Scientific paper

We show, using covariant Lyapunov vectors, that the tangent space of spatially-extended dissipative systems is split into two hyperbolically decoupled subspaces: one comprising a finite number of frequently entangled "physical" modes, which carry the physically relevant information of the trajectory, and a residual set of strongly decaying "spurious" modes. The decoupling of the physical and spurious subspaces is defined by the absence of tangencies between them and found to take place generally; we find evidence in partial differential equations in one and two spatial dimensions and even in lattices of coupled maps or oscillators. We conjecture that the physical modes may constitute a local linear description of the inertial manifold at any point in the global attractor.

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