In the High Energy Physics unit, the interactions of hadrons are investigated within the framework of Holographic Quantum Chromodynamics models. This study includes a calculation of the strong interaction's constants and form factors in the framework of the hard and soft wall models of AdS/QCD and the study of QCD interaction problems at finite temperatures. In addition, research on quantum phenomena in the very early Universe and background of microscopic black holes is carried out in this section. Problems of the quantum field theory in the background of the strong electromagnetic and gravitational fields are solved as well.