Effective Mass of Atom and Excitation Spectrum in Liquid Helium-4 at T=0 K

Details Effective Mass of Atom and Excitation Spectrum in Liquid Helium-4 at T=0 K Effective Mass of Atom and Excitation Spectrum in Liquid Helium-4 at T=0 K

2002-03-25

arxiv.org/abs/cond-mat/0203484v1

Fizika Nizkikh Temperatur 29, No. 2, 145-148 (2003); Low Temp. Phys. 29, 105-107 (2003)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 1 figure

Scientific paper

10.1063/1.1542407

A self-consistent approach is applied for the calculations within the two-time temperature Green functions formalism in the random phase approximation. The effective mass of He4 atom is computed as $m^*=1.58 m$. The excitation spectrum is found to be in a satisfactory agreement with the experiment. The sound velocity is calculated as 230 m/s. The temperature of the Bose-condensation with the effective mass taken into consideration is estimated as 1.99 K.

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