Dresden 2011 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 53: Optical Properties I

HL 53.4: Vortrag

Mittwoch, 16. März 2011, 13:15–13:30, POT 251

Quantum-optical correlations in dissipative quantum-dot systems — •Martin Mootz, Mackillo Kira, and Stephan W. Koch — Department of Physics and Material Sciences Center, Philipps-University Marburg, Renthof 5, D-35032 Marburg

Quantum-optical spectroscopy is based on a concept where the system interactions are controlled and characterized through the quantum fluctuations of the light. We apply this scheme to semiconductor systems which exhibit a complicated many-body problem dominated by the Coulomb interaction among electrons and holes and by coupling with the semiconductor environment. To gain insights on the quantum-optical spectroscopy, we model quantum-dot systems via the Jaynes-Cummings model coupled to a reservoir. We characterize the quantum features of the light source and the resonance fluorescence via the cluster-expansion transformation that yields a one-to-one mapping between correlated clusters and the traditional phase-space distributions. We investigate the transition from strong-to-weak coupling, which is typically considered to be the border between quantum-optical and classical studies. We show that quantum-optical spectroscopy can detect nonclassical features even in the weak-coupling regime where dephasing completely removes direct quantum-optical signatures such as revivals and quantum-Rabi flopping.