Real-time kadanoff-baym approach to plasma oscillations in a correlated electron gas

N. H. Kwong, M. Bonitz

Research output: Contribution to journalArticlepeer-review

154 Scopus citations

Abstract

A nonequilibrium Green’s functions approach to the collective response of correlated Coulomb systems at finite temperatures is presented. It is shown that solving Kadanoff-Baym-type equations of motion for the two-time correlation functions including the external perturbing field allows one to compute the plasmon spectrum with collision effects in a systematic and consistent way. The scheme has a “built-in” sum-rule preservation and is simpler to implement numerically than the equivalent equilibrium approach based on the Bethe-Salpeter equation.

Original languageEnglish (US)
Pages (from-to)1768-1771
Number of pages4
JournalPhysical review letters
Volume84
Issue number8
DOIs
StatePublished - 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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