Coulomb Interactions via Local Dynamics: A Molecular--Dynamics Algorithm

Details Coulomb Interactions via Local Dynamics: A Molecular--Dynamics Algorithm Coulomb Interactions via Local Dynamics: A Molecular--Dynamics Algorithm

2004-06-09

arxiv.org/abs/cond-mat/0406223v1

Physics

Condensed Matter

Statistical Mechanics

8 figures

Scientific paper

10.1088/0953-8984/16/38/017

We derive and describe in detail a recently proposed method for obtaining Coulomb interactions as the potential of mean force between charges which are dynamically coupled to a local electromagnetic field. We focus on the Molecular Dynamics version of the method and show that it is intimately related to the Car--Parrinello approach, while being equivalent to solving Maxwell's equations with freely adjustable speed of light. Unphysical self--energies arise as a result of the lattice interpolation of charges, and are corrected by a subtraction scheme based on the exact lattice Green's function. The method can be straightforwardly parallelized using standard domain decomposition. Some preliminary benchmark results are presented.

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