On the thermodynamics of degenerate Bose gas with delta-shaped interaction potential
Viktor Borisovich Bobrov, Anatolij G. Zagorodny, S. A. Trigger
Within the self-consistent Hartree–Fock approximation, the equilibrium weakly nonideal Bose gas with a delta-shaped interaction potential in the presence of the Bose–Einstein condensate is considered without using quasi-averages. On this basis, using the virial theorem and diagram techniques of the perturbation theory for the equilibrium system in a macroscopic volume, the equation of state providing the isothermal compressibility finiteness, including the Bose–Einstein condensate domain of existence, is obtained.
Bulletin of the Lebedev Physics Institute•Dec 1, 2016•0 citations