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Article Dans Une Revue Reviews in Mathematical Physics Année : 2021

Orbital stability vs. scattering in the cubic-quintic Schrodinger equation

Résumé

We consider the cubic-quintic nonlinear Schrödinger equation in space dimension up to three. The cubic nonlinearity is thereby focusing while the quintic one is defocusing, ensuring global well-posedness of the Cauchy problem in the energy space. The main goal of this paper is to investigate the interplay between dispersion and orbital (in-)stability of solitary waves. In space dimension one, it is already known that all solitons are orbitally stable. In dimension two, we show that if the initial data belong to the conformal space, and have at most the mass of the ground state of the cubic two-dimensional Schrödinger equation, then the solution is asymptotically linear. For larger mass, solitary wave solutions exist, and we review several results on their stability. Finally, in dimension three, relying on previous results from other authors, we show that solitons may or may not be orbitally stable.
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Dates et versions

hal-02475123 , version 1 (11-02-2020)
hal-02475123 , version 2 (25-04-2020)
hal-02475123 , version 3 (21-05-2020)

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Rémi Carles, Christof Sparber. Orbital stability vs. scattering in the cubic-quintic Schrodinger equation. Reviews in Mathematical Physics, 2021, 33 (3), pp.article n° 2150004. ⟨10.1142/S0129055X21500045⟩. ⟨hal-02475123v3⟩
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