A parallel drawn between classical correlation functions of molecular densities and correlation functions of charge densities arising in the quantum mechanical treatment of molecular fluids enables us to introduce the notion of a direct correlation function between charges, which can be used to derive an accurate equation of state that incorporates both the effect of the short‐range repulsion and the effect of additive and nonadditive many‐molecule dispersion forces.
REFERENCES
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2.
3.
G. Stell, in The Equilibrium Theory of Classical Fluids, edited by H. L. Frisch and J. L. Lebowitz (Benjamin, New York, 1964), p. II‐171.
4.
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J. A.
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S. Baer and E. Bergmann, J. Chem. Phys. (to be published).
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16.
C. Bloch, in Studies in Statistical Mechanics, Vol. III, edited by J. de Boer and G. E. Uhlenbeck (North‐Holland, Amsterdam, 1965), p. 32.
17.
Because of integration over nuclear coordinates, the contribution of uncorrelated pairs of charge densities to the Coulomb interaction is averaged to zero and so we have dropped the term from (8).
18.
19.
20.
Correct (5.1) of Ref. 13 for a missing power 2.
21.
22.
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© 1974 American Institute of Physics.
1974
American Institute of Physics
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