Abstract
Most physical systems are governed by evolution equations of the general form
where L is the Laplacian operator and W represents some combination of multiplicative and nonlinear terms. Some examples are:
(Nonlinear Schrödinger) as well as many other systems, such as the usual Schrödinger equation, reaction-diffusion equations, and the complex Ginzburg-Landau equation. Although the physical system evolves according to the time-dependent equations (1), valuable insight may be gained by studying the closely related equations
and
where DW (Ψ) is the linearization or Jacobian of W evaluated at Ψ. (5) describes the steady states of (1) while (6) describes the eigenmodes of (1) about a steady state Ψ.
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Tuckerman, L.S., Huepe, C., Brachet, ME. (2004). Numerical methods for bifurcation problems. In: Descalzi, O., Martínez, J., Rica, S. (eds) Instabilities and Nonequilibrium Structures IX. Nonlinear Phenomena and Complex Systems, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0991-1_3
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DOI: https://doi.org/10.1007/978-94-007-0991-1_3
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