Molecular Dynamics Simulations of Temperature Equilibration in Dense Hydrogen
Abstract
The temperature equilibration rate in dense hydrogen (for both T_{i}>T_{e} and T_i<T_e) has been calculated with molecular dynamics simulations for temperatures between 10 and 600 eV and densities between 10^{20}/cc to 10^{24}/cc. Careful attention has been devoted to convergence of the simulations, including the role of semiclassical potentials. We find that for Coulomb logarithms L>1, a model by Gericke-Murillo-Schlanges (GMS) [Gericke et al., PRE 65, 036418 (2002)] based on a T-matrix method and the approach by Brown-Preston-Singleton [Brown et al., Phys. Rep. 410, 237 (2005)] agrees with the simulation data to within the error bars of the simulation. For smaller Coulomb logarithms, the GMS model is consistent with the simulation results. Landau-Spitzer models are consistent with the simulation data for L>4.
Cite
@article{arxiv.0802.4037,
title = {Molecular Dynamics Simulations of Temperature Equilibration in Dense Hydrogen},
author = {J. N. Glosli and F. R. Graziani and R. M. More and M. S. Murillo and F. H. Streitz and M. P. Surh and L. X. Benedict and S. Hau-Riege and A. B. Langdon and R. A. London},
journal= {arXiv preprint arXiv:0802.4037},
year = {2009}
}