Campus Units

Chemistry

Document Type

Article

Publication Version

Published Version

Publication Date

2001

Journal or Book Title

Journal of Chemical Physics

Volume

114

Issue

13

First Page

5637

Last Page

5641

DOI

10.1063/1.1353553

Abstract

Various functional integral formalisms of classical monatomic fluids are considered with their applicabilities and limitations compared. For length scales large compared to the particle size, the density field theory, in which the action of the functional integral is simply given by the mean fieldfree energy functional expression, is shown to be a well-defined and rigorous formulation. For short range properties of dense fluids, a different version of the functional integral method is developed by explicitly separating out the hard core part of the interaction. The resulting functional integral is seen to require correlation functions of the hard sphere fluid as the input. The generalized van der Waals equation and the random phase approximation of the cluster diagrammatic methods are recovered simply as the stationary-phase approximation and its Gaussian correction to the functional integral, respectively.

Comments

The following article appeared in Journal of Chemical Physics 114 (2001): 5637, and may be found at doi:10.1063/1.1353553.

Rights

Copyright 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Copyright Owner

American Institute of Physics

Language

en

File Format

application/pdf

Included in

Chemistry Commons

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