Bogolyubov, N.N. Jr.; Sankovich, D.P.
(Вопросы атомной науки и техники, 2012)
The equilibrium properties of a system of interacting bosons are studied from a microscopic point of view. We calculate the superfluid density in the Bogolyubov model of imperfect Bose gas. The model superstable Hamiltonian ...