Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 30: Quantum dots and wires: Transport properties II
HL 30.10: Vortrag
Dienstag, 26. Februar 2008, 16:45–17:00, ER 164
Electron and phonon correlations in a driven two level quantum dot — •Rafael Sanchez1, Gloria Platero1, and Tobias Brandes2 — 1Instituto de Ciencia de Materiales de Madrid-CSIC — 2Technische Universität Berlin
We propose a solid state analogue to Resonance Fluorescence systems in a two-level quantum dot irradiated by a time-dependent monochromatic ac field where the statistics of the spontaneously emitted phonons and the transmitted electrons can be studied. Recent experiments have achieved to measure high order moments for the non-driven electronic case in similar systems[1], but the phonon case is still unchallenged. We develope a method that allows us to extract simultaneously the full counting statistics of the electronic tunneling and relaxation (by phononic emission) events as well as their correlation. We find that the quantum noise of both the transmitted electrons and the emitted phonons and electron-phonon correlation can be controlled and tuned back and forth between sub and super-Poissonian values by the manipulation of the external parameters: the driving field intensity and the bias voltage[2].
[1] S. Gustavsson et al., Phys. Rev. Lett. 96, 76605 (2006).
[2] R. Sánchez, G. Platero and T. Brandes, Phys. Rev. Lett 98, 146805 (2007).