Regensburg 2010 – wissenschaftliches Programm
HL 60.2: Poster
Donnerstag, 25. März 2010, 18:00–20:00, Poster D1
Influence of Coulomb correlations on the quantum well intersubband absorption — •Thi Uyen-Khanh Dang, Andreas Knorr, Carsten Weber, and Marten Richter — Institut für Theoretische Physik, Technische Universität Berlin, Germany
We present a non-Markovian theory for the description of quantum well intersubband dynamics, focusing on the influence of the electron-electron interaction on the absorption properties at low temperatures. The many-body problem is treated within a density-matrix approach using the correlation expansion to obtain equations of motion for the electron density and the intersubband coherence . The inclusion of the electron-electron interaction leads to a correlated electronic ground state and a self-consistently determined broadening of the intersubband absorption spectrum. The resulting influence on the absorption line shape is investigated and discussed for different quantum well widths and doping densities.
 I. Waldmüller et al., Phys. Rev. B 69, 20530766 (2004).