Abstract
Within the random-phase approximation (RPA) or ring sum, the ground-state correlation energy for a uniform gas of charged particles with density parameter tends as →∞ to (-0.803 Ry) . This limit holds for fermions, as for bosons and distinguishable particles. For electrons, the next term in the low-density expansion (of order ) cancels the exchange energy. Corrections to RPA must cancel the term, and can modify the term.
- Received 3 August 1992
DOI:https://doi.org/10.1103/PhysRevB.46.12748
©1992 American Physical Society