Thermodynamic perturbation scheme for the ground-state energy of Lennard-Jones bosons
- 16 November 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 59 (20) , 2322-2325
- https://doi.org/10.1103/physrevlett.59.2322
Abstract
The thermodynamic perturbation scheme so successful for classical-liquid equations of state is applied to the ground-state energy of a many-boson system interacting pairwise via the Lennard-Jones intermolecular potential. The ensuing density and attractive-coupling double expansion for the energy is series analyzed with Padé techniques, as well as generalizations thereof. Results through sixth order compare with Green’s-function Monte Carlo simulations at the 1% level of accuracy.Keywords
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