Poluektov Y. Quantum-field description of many-particle systems with broken symmetries on the basis of the self-consistent field model

The object is a phenomenon of the spontaneous broken symmetry in nonrelativistic systems of large number of Fermi and Bose-particles. The aim - construction of the generalized quantum-field approach to the microscopical description of equilibrium properties the multiparticle Fermi and Bose-systems with the spontaneously broken symmetries on the basis of selection as a main approximation of generalized model of a self-consistent field. The methods are self-consistent field, Green functions, perturbation theory, group theory. The new approaches and results: The perturbation theory and diagram technique for calculation of temperature Green functions in the multiparticle Fermi and Bose-systems with the spontaneously broken symmetries are constructed. The influencing of crystalline structure and symmetry on properties of superconductors on microscopical and phenomenological levels are investigated. The sphere of use is condensed matter physics, statistical physics.