Journal
JOURNAL OF STATISTICAL PHYSICS
Volume 103, Issue 5-6, Pages 753-776Publisher
SPRINGER
DOI: 10.1023/A:1010396502815
Keywords
Coulomb fluids; sine-Gordon action; low-fugacity expansion
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We present an exact field theoretical representation of the statistical mechanics of classical hard-core Coulomb systems. This approach generalizes the usual sine-Gordon theory valid for point-like charges or lattice systems to continuous Coulomb fluids with additional short-range interactions. This formalism is applied to derive the equation of state of the restricted primitive model of electrolytes in the low fugacity regime up to order p(5/2) (rho number density). We recover the results obtained by Haga by means of Mayer graphs expansions.
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