ISSN:
1434-6079
Keywords:
PACS. 52.25.Kn Thermodynamics of plasmas – 61.20.Gy Theory and models of liquid structure – 05.20.-y Classical statistical mechanics
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: An accurate and systematic equation of state for the hard-core one-component plasma (HCOCP) is obtained. The result is based on the Hubbard-Schofield transformation which yields the field-theoretical Hamiltonian, with coefficients expressed in terms of equilibrium correlation functions of the reference hard-core fluid. Explicit calculations were performed using the Gaussian approximation for the effective Hamiltonian and known thermodynamic and structural properties of the reference hard-core fluid. For small values of the plasma parameter Γ and packing fraction the Debye-Hückel result is recovered, while for Γ≫ 1, the excess free energy F ex and internal U ex energy depend linearly on Γ. The obtained expression for U ex is in a good agreement with the available Monte Carlo data for the HCOCP. We also analyse the validity of the widely used approximation, which represents the free energy as a sum of the hard-core and electrostatic part.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1140/epjd/e20020039
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