Publication: Research - peer-review › Journal article – Annual report year: 1994
We analyze nonequilibrium screening with nonequilibrium Green function techniques. By employing the generalized Kadanoff-Baym ansatz to relate the correlation function to the nonequilibrium distribution function, the latter of which is assumed to be a shifted Maxwellian, an analytically tractable expression is derived for the nonequilibrium dielectric function epsilon(K, omega). For certain values of momenta K and frequency omega, Imepsilon(K, omega) becomes negative, implying a plasma instability. This new instability exists only for strong electric fields, underlining its nonequilibrium origin.
|Journal||Physical Review E. Statistical, Nonlinear, and Soft Matter Physics|
|State||Published - 1994|
Copyright (1994) by the American Physical Society.
|Citations||Web of Science® Times Cited: 13|
- SYSTEMS, SEMICONDUCTORS, QUANTUM TRANSPORT-EQUATIONS
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