First sound velocity in liquid $^{4}$He
Quantum Gases
2015-12-25 v1
Abstract
Based on the many-boson system structure factor, which takes into account three- and four-particle direct correlations, there was found the first sound velocity temperature behaviour in liquid He in the post-RPA approximation. The expression received for the sound velocity matches with the well-known results in both low and high temperature limits. The results of this paper can be used to analyze the contributions of three- and four-particle correlations into thermodynamic and structural features of liquid He.
Keywords
Cite
@article{arxiv.1512.07742,
title = {First sound velocity in liquid $^{4}$He},
author = {O. I. Hryhorchak},
journal= {arXiv preprint arXiv:1512.07742},
year = {2015}
}
Comments
7 pages, 1 figure