2015/06/12 by I. O. Vakarchuk, Ivan Vakarchuk, Vakarchuk, Ivan +2
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Optical properties and cooling technologies in crystalline materials #Quantum Gases (cond-mat.quant-gas) #Quantum, superfluid, helium dynamics #cond-mat.quant-gas
paper · pdf · doi:10.48550/arxiv.1506.03987
19 pages, 6 figures, in Ukrainian
arxiv created 2015/06/12 · openalex publication_date 2015/06/12 · arxiv updated 2015/06/15 · openalex created_date 2022/10/05 · openalex updated_date 2026/07/28
In this paper we calculate kinetic, potential and full energy with three- and four-particle direct correlations taken into account at wide temperature region on the base of the density matrix of the interacting Bose-particles [I. O. Vakarchuk, O. I. Hryhorchak, Journ. Phys. Stud. \bf 3, 3005 (2009)]. In the low temperature limit the obtained expression for the full energy is equal to the wellknown expression for ground state energy in the approximation of "two sums over the wave vector." The results of this work can be applied for the numeric calculation of the heat capacity of liquid 4He in order to check the theoretical and experimental results quantatively, especially in the λ-transition region.