Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 38: Poster Session Transport
TT 38.30: Poster
Mittwoch, 16. März 2011, 14:00–18:00, P3
Diagrammatic approach to noise in adiabatically time-dependent systems — •Roman-Pascal Riwar1, Janine Splettstoesser1, and Jürgen König2 — 1Institut für Theorie der Statistischen Physik, RWTH Aachen University, D-52056 Aachen, Germany and JARA-Fundamentals of Future Information Technology — 2Theoretische Physik, Universität Duisburg-Essen and CeNIDE, 47048 Duisburg, Germany
Noise is an important feature in quantum electron transport. Current-current correlations carry information about the system which is not accessible via a current measurement only. Here, we are interested in the noise of interacting quantum dot systems, which are subject to time-dependent fields, as e.g. adiabatic quantum pumps. We investigate the zero-frequency noise of such systems, taking into account Coulomb interaction. For this purpose, a real-time diagrammatic approach for the treatment of adiabatic time dependence [1] is extended to the calculation of current noise (performed for the stationary case in Ref. [2]), within a perturbative expansion in the tunnel coupling.
J. Splettstoesser et al., Phys. Rev. B 74, 085305 (2006)
A. Thielmann et al., Phys. Rev. Lett. 95, 146806 (2005)