MERCREDI 20 MAI 2009 14 heures Salle Séminaire 5 Centre de Physique Théorique Marseille-Luminy Bernd Metzger LAGA, Univ Paris 13 Title: The discrete Gross-Pitaevskii model and condensation in the single particle ground state Abstract: In the context of a tight-binding approximation of the Gross-Pitaevskii energy functional with a random background potential we want to discuss in dependence on the interaction coupling constant a criteria when the Gross-Pitaevskii ground state and the single particle ground state coincide.