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Harmonic Lattice Theory of Coulomb Solids and Comparison with Monte Carlo Simulations
Author(s) -
DeWitt H.,
Slattery W.,
Baiko D.,
Yakovlev D.
Publication year - 2001
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/1521-3986(200103)41:2/3<251::aid-ctpp251>3.0.co;2-g
Subject(s) - anharmonicity , monte carlo method , physics , coulomb , quantum monte carlo , lattice (music) , harmonic , condensed matter physics , quantum , phase transition , statistical physics , quantum mechanics , electron , statistics , mathematics , acoustics
The potential energy of the OCP in the fluid phase is known to great accuracy from Monte Carlo (MC) data obtained from very long simulations. For the crystalline phase, bcc or fcc, the MC simulations are equally accurate but can also be represented nearly analytically in the Harmonic Lattice (HL) approximation. We give here recent results for the anharmonic effects in the classical regime T ≫ T p (where T p is the on plasma temperature) both exact and obtained in the HL approximation. We also give results for the harmonic potential energy in a quantum OCP crystal and discuss the importance of quantum effects for the fluid‐lattice phase transition.