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TT: Fachverband Tiefe Temperaturen

TT 47: TR: Nanoelectronics I - Quantum Dots, Wires, Point Contacts 1

TT 47.3: Vortrag

Donnerstag, 17. März 2011, 11:00–11:15, HSZ 304

Full counting statistics of a molecular quantum dot with strong electron-phonon interaction — •Stefan Maier and Andreas Komnik — Institut für Theoretische Physik, Heidelberg, Germany

We investigate the non-equilibrium charge transfer properties of a single level quantum dot with a local bosonic degree of freedom (aka Holstein phonon) coupled to metallic reservoirs. Using the Lang-Firsov transformation we have derived a diagrammatic scheme for the calculation of the full counting statistics. Our approach is exact in the electron-phonon interaction and resums a certain diagram subset with respect to the tunneling amplitude. A comparison with Monte-Carlo simulation data shows that the formalism captures basic properties of the strong electron-phonon coupling regime. In addition to the non-linear current-voltage relation we analyze noise properties and higher order cumulants of the system.