DOI:10.5488/CMP.18.43001 arXiv:1512.07742
Title:
First sound velocity in liquid 4He
Author(s):
| O.I. Hryhorchak (Department for Theoretical Physics, Ivan Franko National University of Lviv, 12 Drahomanov St., 79005 Lviv, Ukraine) |
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 4He 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 4He .
Key words:
boson systems, liquid
PACS: 05.30.Jp, 67.25.-k, 43.35.+d, 62.60.+v,67.25.dt
| Full text [pdf] | << List of papers |