Real-Time Kadanoff-Baym Approach to Plasma Oscillations in a Correlated Electron Gas

Nai-Hang Kwong, M. Bonitz

Research output: Contribution to journalArticle

140 Citations (Scopus)

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
StatePublished - Feb 21 2000

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Bethe-Salpeter equation
plasma oscillations
sum rules
electron gas
equations of motion
Green's functions
collisions
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Real-Time Kadanoff-Baym Approach to Plasma Oscillations in a Correlated Electron Gas. / Kwong, Nai-Hang; Bonitz, M.

In: Physical Review Letters, Vol. 84, No. 8, 21.02.2000, p. 1768-1771.

Research output: Contribution to journalArticle

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