Nonequilibrium green's functions and kin
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K. Henneberger; G. Manzke; V. May; R. Zimmermann
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Article
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1986
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Elsevier Science
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English
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Nonequilibrium Green's function technique is applied to the many-exciton system under the action of an externally driven light field. Starting with Dyson's equation for the nonequilibrium exciton propagator the shift and damping of exciton-levels due to exciton-exciton interaction are calculated in