A multistream model for quantum plasmas
摘要
The dynamics of a quantum plasma can be described self-consistently by the nonlinear Schroedinger-Poisson system. Here, we consider a multistream model representing a statistical mixture of N pure states, each described by a wavefunction. The one-stream and two-stream cases are investigated. We derive the dispersion relation for the two-stream instability and show that a new, purely quantum, branch appears. Numerical simulations of the complete Schroedinger-Poisson system confirm the linear analysis, and provide further results in the strongly nonlinear regime. The stationary states of the Schroedinger-Poisson system are also investigated. These can be viewed as the quantum mechanical counterpart of the classical Bernstein-Greene-Kruskal modes, and are described by a set of coupled nonlinear differential equations for the electrostatic potential and the stream amplitudes.
引用
@article{arxiv.cond-mat/0203405,
title = {A multistream model for quantum plasmas},
author = {F. Haas and G. Manfredi and M. Feix},
journal= {arXiv preprint arXiv:cond-mat/0203405},
year = {2007}
}
备注
20 pages, 10 figures