Euler-Lagrange calculations of the ground state properties of liquid 4He at several densities and for six different two-body potentials are compared to one another and to experiment. The trial ground state wave functions used are the Jastrow function and the triplet Feenberg function. Four recent potentials produce very good agreement with recent neutron and X-ray liquid structure function measurements. The experimental energy per particle lies about 0.3 K below two of the theoretical curves and 0.3 K above a third, all obtained using the triplet Feenberg function, though no fundamental three-body potentials are included.
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Research supported in part by NSF grants DMR-7926447 and DMR-7809226.
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Whitney, L.R., Pinski, F.J. & Campbell, C.E. Test of interparticle potentials for liquid 4He. J Low Temp Phys 44, 367–396 (1981). https://doi.org/10.1007/BF00120783
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DOI: https://doi.org/10.1007/BF00120783