Condensed Matter Physics, 1997, No 9, p.
117-126, English
DOI:10.5488/CMP.9.117
Title: CALCULATION OF THE DENSITY MATRIX OF LIQUID HELIUM 4
Authors: I.Vakarchuk, K.Vasylyna (Ivan Franko Lviv State
University, Department for Theoretical Physics, 12 Dragomanov St.,
UA-290005, Lviv-05, Ukraine)
A system of N atoms of liquid 4He is under consideration. The calculation of
the one-particle density matrix based on the pair correlation function
method is presented. Number of terms is factorized and summized with
extracting the small terms. The results obtained have the form of the two
terms sum where the first term have the structure similar to the density
matrix of ideal bose-gas. The equations for calculating the temperature of
bose-condensation are presented.
Comments: Figs. 0, Refs. 11, Tabs. 0.