Field theory fo charged fluids and colloids

Abstract

A systematic field theory is presented for charged systems. The one-loop level corresponds to the classical Debye-Hückel (DH) theory, and exhibits the full hierarchy of multi-body correlations determined by pair-distribution functions given by the screened DH potential. Higher-loop corrections can lead to attractive pair interactions between colloids in asymmetric ionic environments. The free energy follows as a loop-wise expansion in half-integer powers of the density; the resulting two-phase demixing region shows pronounced deviations from DH theory for strongly charged colloids.

4 pages, 2 ps figs; new version corrects some minor typos

References in corpus (2)

• Steric Effects in Electrolytes: A Modified Poisson-Boltzmann Equation
• Accurate first-principle equation of state for the One-Component Plasma

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