Variational approach to Yukawa fluids. I. Thermodynamics

2026/06/24 by S. A. Khrapak, A. G. Khrapak
Engineering · #Characterization and Applications of Magnetic Nanoparticles #Phase Equilibria and Thermodynamics #Thermoelastic and Magnetoelastic Phenomena #cond-mat.soft #cond-mat.stat-mech #physics.plasm-ph

paper · pdf · doi:10.1103/kvnp-nf1l

openalex publication_date 2026/06/24 · openalex created_date 2026/06/25 · openalex updated_date 2026/07/25

Abstract

The excess energy, entropy, and pressure of a strongly coupled Yukawa fluid are calculated from the variational approach using the fluid of hard spheres as a reference system. As in the case of the one-component plasma, the Percus-Yevick virial entropy is appropriate for such calculations and delivers remarkable agreement with available results from molecular dynamics simulations. The agreement with the molecular-dynamics results is particularly impressive in the strongly coupled regime, making this approach a useful predictive tool when numerical data are scarce or not yet available. As an application of the variational approach, we estimate the location of the melting curve in the regime of sufficiently strong screening.

Citations

• Variational approach to Yukawa fluids. II. Instantaneous elastic moduli and sound velocities
• One--Component Plasma Equation of State Revisited via Angular--Averaged Ewald Potential
• Heat capacity of dense liquids: A link between two-phase model and melting temperature scaling
• Speed of sound in dense simple liquids
• Density functional theory and the asymptotic high density expansion of the free energy of classical solids and fluids

Cited by

• Variational approach to Yukawa fluids. II. Instantaneous elastic moduli and sound velocities

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