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

By T. Schmielau and M. F. Pereira


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. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3272675

Publisher: American Institute of Physics
Year: 2009
DOI identifier: 10.1063/1.3272675
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