Exchange effects in plasmas: the case of low-frequency dynamics.
Recently, there has been a surge of interest in nonequilibrium collective quantum models, where particle dispersion and spin are examples of effects taken into account. Here, we derive a kinetic plasma model containing fermion exchange effects. Exchange interactions are of great importance in many systems and have no classical analogy. Our model therefore constitutes a possible probe of collective quantum phenomena in other regimes. As an example, we consider the influence of the exchange effect on low-frequency dynamics, in particular ion-acoustic waves. Comparisons to related computational techniques are given and the differences are highlighted. Furthermore, we discuss the applicability of our model, its limitations, and possible extensions.
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden.
J
J
Zamanian
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden and Department of Applied Physics, Division for Condensed Matter Theory, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
M
M
Marklund
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden.
G
G
Brodin