Minimizing travelling waves for the one-dimensional nonlinear Schrödinger equations with non-zero condition at infinity
DOI:
https://doi.org/10.12775/TMNA.2024.059Keywords
Schrödinger equation, travelling waves, variational argument, orbital stabilityAbstract
This paper deals with the existence of travelling wave solutions for a general one-dimensional nonlinear Schrödinger equation. We construct these solutions by minimizing the energy under the constraint of fixed momentum. We also prove that the family of minimizers is stable. Our method is based on recent articles about the orbital stability for the classical and nonlocal Gross-Pitaevski{\u\i} equations \cite{BetGrSa2}, \cite{deLaMen1}. It relies on a concentration-compactness theorem, which provides some compactness for the minimizing sequences and thus the convergence (up to a subsequence) towards a travelling wave solution.References
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