First sound velocity in liquid ^{4}He
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 ^{4}He in the post-RPA approximation. The expression received for the sound velocity matches with the well-...
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| Format: | Article |
| Language: | English |
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Institute for Condensed Matter Physics
2015-12-01
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| Series: | Condensed Matter Physics |
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| Online Access: | http://dx.doi.org/10.5488/CMP.18.43001 |
| Summary: | 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 ^{4}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 ^{4}He. |
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| ISSN: | 1607-324X |