Modulation analysis for a stochastic NLS equation arising in Bose-Einstein condensation

Anne De Bouard, Reika Fukuizumi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We study the asymptotic behavior of the solution of a model equation for Bose-Einstein condensation, in the case where the trapping potential varies randomly in time. The model is the so called Gross-Pitaevskii equation, with a quadratic potential with white noise fluctuations in time whose amplitude ε tends to zero. The initial condition of the solution is a standing wave solution of the unperturbed equation. We prove that up to times of the order of ε-2, the solution decomposes into the sum of a randomly modulated standing wave and a small remainder, and we derive the equations for the modulation parameters. In addition, we show that the first order of the remainder, as ε goes to zero, converges to a Gaussian process, whose expected mode amplitudes concentrate on the third eigenmode generated by the Hermite functions, on a certain time scale.

Original languageEnglish
Pages (from-to)189-235
Number of pages47
JournalAsymptotic Analysis
Issue number4
Publication statusPublished - 2009


  • Expected mode powers
  • Harmonic potential
  • Nonlinear Schrödinger equation
  • Standing waves
  • Stochastic partial differential equations
  • White noise

ASJC Scopus subject areas

  • Mathematics(all)


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