Résumé de l'exposé de Victor Kalt (LMRS) Vortices in Bose-Einstein condensates: simulations and identification of vortex lines Bose-Einstein condensates are a state of matter characterized by a quantized circulation of the velocity. This property explains the presence of vortices different from the ones in conventional fluids. In this presentation, I will describe a method to extract informations about the vortices from numerical simulation data.