Molecular Dynamics Simulations

strongly correlated weakly degenerate one-component plasma

Computation of Thermodynamic (equilibrium) quantities: pressure, energy, pair distributions etc.
Computation of dynamic properties: density-density correlation function, dynamic structure factor etc.
Peaks of the Structure factor yield the optical plasmon dispersion
Classical molecular dynamics rigorously describes strongly correlated systems
Using effective quantum pair potentials (Kelbg potential), quantum effects can be "built in"

Langmuir (optical) plasmon dispersion of correlated electrons

The dashed line is what standard linearized Vlasov theory (RPA) predicts

Figures show the plasmon dispersion for varying strength of the coupling parameter, Gamma=mean Coulomb energy/kinetic energy.

1. Weakly correlated plasma:

2. Intermediate correlation strength:

3. Strong correlations:

Plasmon frequency in units of the optical plasma frequency vs. wave number in units of the mean interparticle distance

Damping of Langmuir waves of correlated electrons

lowest curve is the prediction of linearized Vlasov theory

Simulation results by Vova Golubnichiy, 2000. For details, see our recent publication

For a brief explanation of the principles of the simulations, click here
Research Results | Back to main page | Hauptseite