First sound velocity in liquid ⁴He

• Published in: Condensed Matter Physics
• Date: 2015
• Main Author: Hryhorchak, O.I.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2015
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/155264
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: First sound velocity in liquid ⁴He / O.I. Hryhorchak // Condensed Matter Physics. — 2015. — Т. 18, № 4. — С. 43001: 1–7. — Бібліогр.: 33 назв. — англ.

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-kno...