TITLE

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

AUTHOR(S)
Schmielau, T.; Pereira, M. F.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p231111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
46708347

 

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