On the continuous resonant equation for NLS. I. Deterministic analysis

Pierre Germain, Zaher Hani, Laurent Thomann

Research output: Contribution to journalArticlepeer-review


We study the continuous resonant (CR) equation which was derived in [8] as the large-box limit of the cubic nonlinear Schrödinger equation in the small nonlinearity (or small data) regime. We first show that the system arises in another natural way, as it also corresponds to the resonant cubic Hermite-Schrödinger equation (NLS with harmonic trapping). We then establish that the basis of special Hermite functions is well suited to its analysis, and uncover more of the striking structure of the equation. We study in particular the dynamics on a few invariant subspaces: eigenspaces of the harmonic oscillator, of the rotation operator, and the Bargmann-Fock space. We focus on stationary waves and their stability.

Original languageEnglish (US)
Pages (from-to)131-163
Number of pages33
JournalJournal des Mathematiques Pures et Appliquees
Issue number1
StatePublished - 2016


  • Harmonic oscillator
  • Lowest landau level
  • Nonlinear schrödinger equation
  • Resonant equation
  • Stationary solutions

ASJC Scopus subject areas

  • General Mathematics
  • Applied Mathematics


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