In October 2025, the group consists of three professors (ENS-PSL C. Policar, Univ. Paris Cité S. Vriz, and Sorbonne univ. H. Bertrand.), one professor “emeritus” (ENS M. Volovitch), a CNRS director of research (N. Delsuc), two associate professors (Univ. Paris Cité C. Rampon, ENS-PSL A. Balfourier), one assistant engineer (D. Biatuma – partly in our group (50 %) and partly with other members of our institute, Léa Alem) and three post-doctoral fellows (A. Behar, B. Simoneau, and K. Delaunay) and ten PhDs students (co-supervized by the group members, see page people for a complete list).

















