Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1998-07-20
Physics
Condensed Matter
Statistical Mechanics
27 pages, 8 postscript figures
Scientific paper
10.1103/PhysRevB.59.8844
The local environment and the energetic properties of one $^3$He atom solved in bulk superfluid $^4$He are studied by means of the diffusion Monte Carlo method. The chemical potential of the $^3$He impurity is calculated with a generalized reweighting method which allows for a reliable estimation of this quantity. Results for the chemical potential, radial distribution and structure functions, volume-excess parameter, and effective mass are given for several pressures and compared with available experimental data. An overall agreement with experiment is obtained except for the kinetic energy of the $^3$He atom which, in accordance with previous theoretical estimations, appears to be considerably larger than determinations from deep-inelastic neutron scattering.
Boronat Jordi
Casulleras Joaquim
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