First sound velocity in liquid 4He

被引：1

作者：

Hryhorchak, O. I. ^{[1
]}

机构：

[1] Ivan Franko Natl Univ Lviv, Dept Theoret Phys, UA-79005 Lvov, Ukraine

来源：

CONDENSED MATTER PHYSICS | 2015年 / 18卷 / 04期

关键词：

boson systems; liquid He-4; first sound velocity; SUPERFLUID HE-3-HE-4 SOLUTIONS; SELF-CONSISTENT DESCRIPTION; SHORT-RANGE CORRELATIONS; MANY-BOSON SYSTEM; LONG-RANGE; ATTENUATION; DEPENDENCE; HELIUM; ENERGY;

D O I：

10.5488/CMP.18.43001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

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-4 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-4.

引用

页数：7

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