By Jacques Fossey (CNRS, Ecole Polytechnique, France), Daniel Lefort (CNRS, Groupe des Laboratoires de Vitry-Thiais, Janine Sorba (CNRS
By Razvan Gheorghe Gurau (Researcher, Researcher, Centre de Physique Theorique, Ecole Polytechnique, CNRS, Universite Paris-Saclay, France)
