A. A. Rovenchak
Published 2002-04-11Version 1
The calculation of the He4 energy and specific heat is carried out in a wide temperature range within the two-time temperature Green functions approach. The approximation improving the random phase approximation is developed providing the correct behaviour of the calculated specific heat at the temperatures $0 < T/T_c < 0.65$ and $T/T_c> 1.32$ where $T_c$ stands for the phase transition point.
Comments: 10 pages, 2 figures
Journal: Journal of Physical Studies (Lviv) 6, No. 3, 298-304 (2002)
Inhomogeneous fluid of penetrable-spheres: application of the random phase approximation
Linear density response in the random phase approximation for confined Bose vapours at finite temperature
Phase behaviour and the random phase approximation for ultrasoft restricted primitive models
