J. Phys. IV France 10 (2000) Pr5-455-Pr5-459
The quantum-diffraction term in the free energy for Coulomb plasma and the effective-potential approachT. Kahlbaum
Institut für Physik, Humboldt-Universität zu Berlin, Invalidenstrasse 110, 10115 Berlin, Germany
This paper gives a concise derivation of the quantum-diffraction term at the order n5/2 in the expansion with respect to density n of Helmholtz' free energy F for Coulomb plasma within the effective-potential approach. Starting with the many-body cluster expansion of F, it is shown that this particular term comes from the irreducible part of the screened three-particle Slater sum in the third cluster integral.
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