Nonequilibrium many body theory for quantum transport in terahertz quantum cascade lasers

T. Schmielau, M. F. Pereira

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Abstract

This paper presents a predictive Keldysh nonequilibrium many body Green's functions theory for quantum transport including high order electron-electron, electron-phonon, electron-impurity, and interface roughness scattering processes. Our approach is fully frequency and momentum dependent including nondiagonal dephasing terms in both frequency and k-space. A detailed balance between coherent and scattering processes leads to local current conservation even if a small number of states is considered. Good agreement with experiments is obtained for a terahertz quantum cascade laser.

Original languageBritish English
Article number231111
JournalApplied Physics Letters
Volume95
Issue number23
DOIs
StatePublished - 2009

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