Abstract

Diffusion Monte Carlo calculations are reported for liquid 4He using a Lennard-Jones potential and for solid molecular hydrogen using a reliable spherical pair potential and Axilrod–Teller three body interactions. Calculated thermodynamic and structural properties are in good agreement with experiment over a range of densities. Discrepancies between calculated and experimental values for hydrogen at the highest densities are attributed to the neglect of anisotropy in the calculations.

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