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Dissipative Charge Transfer Dynamics in an Asymmetric Double Quantum Well
Author(s) -
May V.,
Kühn O.,
Thomas P.,
Vaupel H.
Publication year - 1993
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221770113
Subject(s) - dissipative system , charge (physics) , dissipation , physics , phonon , density matrix , quantum , coupling (piping) , dynamics (music) , charge density , quantum mechanics , electron , statistical physics , classical mechanics , materials science , acoustics , metallurgy
Charge oscillations in an asymmetric double quantum well structure are described in terms of a density matrix theory for a coupled three‐level system. Including the phonon modes of the quantum well structure both an exact and a perturbational treatment with respect to the electron‐phonon coupling is presented. In additional, the physical meaning of the approximations leading to the perturbational approach is clarified. The exact treatment is used to calculate the temporal evolution of the charge distribution over the various levels. Furthermore, the influnence of dissipation on the dynamics is studied.