Effective dynamics of double solitons for perturbed mKdV

Details Effective dynamics of double solitons for perturbed mKdV Effective dynamics of double solitons for perturbed mKdV

2009-12-28

arxiv.org/abs/0912.5122v2

Mathematics

Analysis of PDEs

The numerical illustrations of the results and MATLAB codes can be found at http://math.berkeley.edu/~zworski/hpzweb.html

Scientific paper

We show that an interacting double soliton solution to the perturbed mKdV equation is close in $H^2$ to a double soliton following an effective dynamics obtained as Hamilton's equations for the restriction of the mKdV Hamiltonian to the submanifold of solitons. The interplay between algebraic aspects of complete integrability of the unperturbed equation and the analytic ideas related to soliton stability is central in the proof.

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