Zsolt Kis obtained his PhD in 2000 at the University of Szeged in the Doctoral School of Physics. His main research field is quantum optics, he focuses on modelling resonant light-matter interaction in multilevel atomic systems, simulation of light pulse propagation in photonic crystals. Recently he has been leading quantum optical experiments with rare earth ion doped single crystals. He was member of the Editorial Board of the journal Physical Review A of the American Physical Society between 2011-2016. He participated in the development of the first Hungarian continuous-variable quantum key distribution (CV-QKD) system. Now he leads the development of a new CV-QKD system and a discrete-variable QKD system, which uses the BB84 algorithm. He has published 75 scientific papers, 48 in peer reviewed journals. He has received 864 independent citations. He has one submitted patent in connection with the temporal synchronization of QKD systems.