Helium-4 Energy and Specific Heat in Superfluid and Normal Phase

A. A. Rovenchak

doi:10.30970/jps.06.298

paper

Helium-4 Energy and Specific Heat in Superfluid and Normal Phase

arXiv:cond-mat/0204240 · doi:10.30970/jps.06.298

Abstract

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.

arXiv comment10 pages, 2 figures