Two-atomic potential and distortion of excitation spectrum of liquid He-4 by admixture of He-3
arXiv:cond-mat/0112055
Abstract
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