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

A. A. Rovenchak
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Abstract

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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BibTeXRIS

A. A. Rovenchak. 2002-03-25. Effective Mass of Atom and Excitation Spectrum in Liquid Helium-4 at T=0 K. https://doi.org/10.1063/1.1542407

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