A multistream model for quantum plasmas

Details A multistream model for quantum plasmas A multistream model for quantum plasmas

2002-03-20

arxiv.org/abs/cond-mat/0203405v1

F. Haas, G. Manfredi, M. Feix, Phys. Rev. E 62, 2763 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

20 pages, 10 figures

Scientific paper

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.

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