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періодичних видань НАН України
періодичних видань НАН України
Effective mass of atom and the excitation spectrum in liquid helium-4 at T = 0 K
Репозиторій DSpace/Manakin
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Effective mass of atom and the excitation spectrum in liquid helium-4 at T = 0 K
Тема:
Квантовые жидкости и квантовые кpисталлы
Інший ID:
PACS: 67.40.-w, 67.40.Db
Посилання:
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.
Підтримка:
The author is grateful to Prof. I. Vakarchuk for valuable discussions on the problem considered in this work.
Дата:
2003
Переглядів:
497
Завантажень:
364
Анотація:
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.
