Two-atomic potential and distortion of excitation spectrum of liquid He-4 by admixture of He-3

Baranov, D. B.; Yarunin, V. S.; Kirillov, A. I.

Two-atomic potential and distortion of excitation spectrum of liquid He-4 by admixture of He-3

Authors

Baranov, D. B.

Yarunin, V. S.

Kirillov, A. I.

Description

The new interatomic potential g(r), providing the tunnelling of atoms, is suggested for calculating HFB phonon-roton spectrum E(p) of liquid He-4. The tunnelling enables the calculations to reproduce the experimental dependence of shifts E(p) on pressure P induced by He-3 admixture in the constant total density and volume.
5 pages, 2 eps figures, added references