XIII International Workshop on Quantum Optics organized by Vladimir State University. A.G. and N.G. Stoletovs (Vladimir State University, Vladimir), Kazan Institute of Physics and Technology. E.K. Zavoisky FIC Kazan Scientific Center of the Russian Academy of Sciences (Kazan Polytechnic Institute, Kazan Research Center of the Russian Academy of Sciences, Kazan), Institute of Spectroscopy RAS (ISAN, Troitsk, Moscow), Moscow State Pedagogical University (MSPU, Moscow) was held on May 9–15, 2019 in the city of Vladimir.