Effective mass of atom and the excitation spectrum in liquid helium-4 at T = 0 K
A self-consistent approach is applied for calculations within the two-time temperature Green function formalism in the random phase approximation for superfluid ⁴He. The effective mass of the ⁴He atom is computed asm m * =1.58 . The excitation spectrum is found to be in a satisfactory agreement with...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2003 |
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| Format: | Artikel |
| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2003
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| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/128787 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Effective mass of atom and the excitation spectrum in liquid helium-4 at T = 0 K / A.A. Rovenchak // Физика низких температур. — 2003. — Т. 29, № 2. — С. 145-148. — Бібліогр.: 12. назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | A self-consistent approach is applied for calculations within the two-time temperature Green function formalism in the random phase approximation for superfluid ⁴He. The effective mass of the ⁴He atom is computed asm m * =1.58 . The excitation spectrum is found to be in a satisfactory agreement with experiment. The sound velocity is calculated as 230 m/s. The Bose-condensation temperature with the effective mass taken into consideration is estimated as 1.99 K.
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| ISSN: | 0132-6414 |