Helium at elevated pressures: Quantum liquid with non-static shear rigidity
Statistical Mechanics
2013-03-15 v1
Abstract
The properties of liquid helium have always been a fascinating subject to scientists. The phonon theory of liquids taking into account liquid non-static shear rigidity is employed here for studying internal energy and heat capacity of compressed liquid 4-He. We demonstrate good agreement of calculated and experimental heat capacity of liquid helium at elevated pressures and supercritical temperatures. Unexpectedly helium remains a quantum liquid at elevated pressures for a wide range of temperature supporting both longitudinal and transverse-like phonon excitations. We have found that in the very wide pressure range 5 MPa-500 MPa liquid helium near melting temperature is both solid-like and quantum.
Cite
@article{arxiv.1303.2031,
title = {Helium at elevated pressures: Quantum liquid with non-static shear rigidity},
author = {Dima Bolmatov and V. V. Brazhkin and K. Trachenko},
journal= {arXiv preprint arXiv:1303.2031},
year = {2013}
}