Prytula R. A self-consistent microscopic theory of thermodynamic and structure functions of Bose-liquid in the approximation of pair interparticle correlations

The thesis is devoted to the description of structure and thermodynamic functions of a strongly interacting Bose-system, namely helium-4, in a wide temperature range. We obtained the expressions for energy, capacity, pair structure factor, the effective mass of the a helium-4 atom, the one-particle, the pair and direct correlation distribution functions, the Bose-Einstein condensate fraction in a wide temperature range. The calculate Bose-Einstein condensation temperature of liquid helium-4 equals Tc = 2.26 K. All the final formulae are written solely via liquid structure factor extrapolated to T=0. The results are used in the educational process, in scientific work. Application realm is the theory of quantum systems.