We present the results of calculations of diffusion coefficients and electrical conductivity of ultracold single and multiply charged plasma by the method of molecular dynamics. The calculations are carried out in a wide range of Coulomb coupling parameters. We thus gain access to fundamental aspects of strongly coupled plasmas under conditions where experimental measurements are difficult. The results obtained for our model can be used for any equilibrium or nonequilibrium strongly coupled plasmas, in which quantum effects are negligible. Comparison with experimental data is made. Theoretical and experimental results are in good agreement. It is shown that the law of similarity for Coulomb systems is valid in a wide region of coupling.

We present the results of calculations of electron and ion diffusion by the method of molecular dynamics in an ultracold multiply charged plasma. The calculations were carried out in a wide range of Coulomb coupling parameter. The problems of similarity for a Coulomb multiply charged plasma are discussed. It is shown that in a multiply charged classical plasma for the diffusion coefficients in a wide range of coupling parameter, the similarity assumption is valid.