Abstract
An efficient optimization scheme has been applied to shadow wave function for the ground state of liquid and solid4He. Results improve on previous variational energies in both phases. In the liquid, the gain over a wave function with only pair and triplet correlations increases with density, pointing to the increasing importance of higher order correlations. Remarkably, the discrepancy with experimental data is nearly constant with density, yielding a very good equation of state. The estimate of the coexistence region is also satisfactory. Optimized shadow wave functions hold promise of an accurate variational description of inhomogeneous Helium systems.
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Moroni, S., Reatto, L. & Fantoni, S. Optimized shadow wave functions for liquid and solid4He. Czech J Phys 46 (Suppl 1), 281–282 (1996). https://doi.org/10.1007/BF02569556
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DOI: https://doi.org/10.1007/BF02569556