Liquid-vapor transition from a microscopic theory: Beyond the Maxwell construction

Details Liquid-vapor transition from a microscopic theory: Beyond the Maxwell construction Liquid-vapor transition from a microscopic theory: Beyond the Maxwell construction

2008-02-05

arxiv.org/abs/0802.0682v2

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.100.165704

A smooth cut-off formulation of the Hierarchical Reference Theory (HRT) is developed and applied to a Yukawa fluid. The HRT equations are derived and numerically solved leading to: the expected renormalization group structure in the critical region, non classical critical exponents and scaling laws, a convex free energy in the whole phase diagram (including the two-phase region), finite compressibility at coexistence, together with a fully satisfactory comparison with available numerical simulations. This theory, which also guarantees the correct short range behavior of two body correlations, represents a major improvement over the existing liquid state theories.

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