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Q: Fachverband Quantenoptik und Photonik
Q 17: Quantum Effects: Entanglement and Decoherence II
Q 17.2: Vortrag
Dienstag, 24. März 2015, 11:15–11:30, B/gHS
Effective dynamics of disordered quantum systems — •Chahan M. Kropf1, Clemens Gneiting1, and Andreas Buchleitner1,2 — 1Institute of Physics, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg — 2Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstr. 19, D-79104 Freiburg
In order to reach a generic understanding of the dynamics of disordered quantum systems, it is not sufficient to focus on single disorder realizations; rather, one studies the dynamical behavior of the system upon average over different realizations. Usually, the time evolution of the ensemble average is derived from direct numerical simulation of many disorder realizations and subsequent averaging. Such approach, however, does not provide any physical insight in the characteristic dynamical manifestations of different types of disorder.
Instead, we seek an effective description of the dynamics of the ensemble average within the framework of quantum master equations. We show that the average dynamics of simple, isolated systems can already give rise to intricate non-Markovian behaviour, manifest, for example, in coherence revivals. Ultimately, this approach may pave an alternative way for the engineering of disordered systems towards desired dynamical properties, such as the preservation of coherence or the optimization of transport.