Localization constraints in Gaussian wave packet molecular dynamics of nonideal plasmas
The problem ofwave packet broadening in themethod ofwave packet molecular dynamics simulations of electron–ion nonideal plasmas is discussed. It is shown that when using a harmonic restrictive potential for the packet widths, simulation results depend strongly on the constraint parameter. Two new approaches to constraining the packet broadening in a less stringent way are analyzed: periodic boundary conditions for widths and a dynamic constraint, based on filtering close particle collisions. These different ways to localize electrons are compared by calculating the dynamical plasma collision rate and the particle pair distribution functions.