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Thermodynamic consistency between the energy and virial routes in the mean spherical approximation for soft potentials.

Santos A

Departamento de Física, Universidad de Extremadura, E-06071 Badajoz, Spain.

It is proven that, for any soft potential phi(r) characterized by a finite Fourier transform phi(k), the virial and energy thermodynamic routes are equivalent if the Fourier transform of the total correlation function divided by the density rho, h(k)/rho, is an arbitrary function of rhobetaphi(k), where beta is the inverse temperature. This class of approximations includes the mean spherical approximation as a particular case.

Published 26 March 2007 in J Chem Phys, 126(11): 116101.
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