Low Temperature Physics: 39, 741 (2013); https://doi.org/10.1063/1.4821754
Физика Низких Температур: Том 39, Выпуск 9 (Сентябрь 2013), c. 958-969    ( к оглавлению , назад )

Theory of structure and thermodynamic function of liquid 4He (Review Article)

I.O. Vakarchuk, V.S. Pastukhov, and R.O. Prytula

Departament for Theoretical Physics, Ivan Franko National University of Lviv 12 Drahomanov Str., Lviv 79005, Ukraine
E-mail: rom_sol@i.ua

Received February 28, 2013


A new method of calculation of the density matrix of a many-boson system is proposed. The calculation of thermodynamic and structure functions at finite temperatures based on density matrix of Bose liquid is made. The structure factor of liquid 4He at T = 0 K is used as an input information for numerical calculation instead of the interatomic potential. We found a good agreement of the calculated quantities with experimental data.

PACS: 05.30.Jp Boson systems;
PACS: 67.25.–k 4He;
PACS: 67.25.bd Thermodynamic properties.

Ключові слова: liquid 4He, density matrix, structure factor, effective mass, temperature of Bose condensation.