Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 75: Poster Session: Transport 1

TT 75.5: Poster

Donnerstag, 23. März 2017, 15:00–19:00, P2-EG

Quantifying system-bath correlations in biased quantum dot systems using the hierarchical quantum master equation technique — •Jakob Bätge and Rainer Härtle — Institut für Theoretische Physik, Georg-August-Universität Göttingen, Germany

We consider quantum dot systems, where system-bath correlations emerge from a continuous exchange of electrons of the dot with its environment, that is leads representing macroscopic electron reservoirs. We analyze these correlations by investigating the transient dynamics in response to time-dependent electric fields, for example a sudden change of the applied bias voltage. To this end, we use the unique properties of the hierarchical quantum master equation technique [1,2], which allow us to turn on and off system-bath correlations completely or only selected parts, at any instant of time. Thus, we are able to define measures for system-bath correlations that can be used for a systematic and quantitative analysis. Here, we present first results of such an analysis, demonstrating the use of the new measures and how they can be accessed experimentally.

[1] Jin et al., JCP 128, 234703 (2008)

[2] Härtle et al., PRB 88, 235426 (2013)