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

D. B. Baranov·V. S. Yarunin·A. I. Kirillov
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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.

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D. B. Baranov, V. S. Yarunin, A. I. Kirillov. 2001-12-24. Two-atomic potential and distortion of excitation spectrum of liquid He-4 by admixture of He-3. https://arxiv.org/abs/cond-mat/0112055

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