Nonlinear relaxation and solvation dynamics in a Coulomb lattice gas

The transient response of ions upon sudden creation or removal of a local, external charge in a one-component Coulomb lattice gas is investigated by Monte Carlo simulations. Our model can be regarded as a simplified description of solvation dynamics processes in electrolyte systems. Effects of the nonlinearity of the relaxation are pointed out and are contrasted with predictions from linear (Debye–Hückel and Debye–Falkenhagen) theories.