Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 101: Transport - Poster Session

TT 101.22: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Real-time Dynamics in the Anderson-Holstein Model with phonon dependent hybridization — •Andre Jovchev and Frithjof B. Anders — Technische Universität Dortmund, Lehrstuhl für Theoretische Physik II, 44221 Dortmund

We study the real-time dynamics after a quench in the one-lead Anderson-Holstein model with a modified hybridization term using the time-dependent numerical renormalization group (TD-NRG). In molecular devices hysteresis effects and negative differential conductions have been reported. Experiments give hints, that these physics are due to the electron-phonon interactions inside the molecule. In our model we show that the short time dynamics of an electronic level in contact with a electronic bath is strongly dependent on the coupling with a phononic mode. The expectation value of the occupancy of the electronic level oscillates with the frequency of the phonon. For long times we show that we reach the equilibrium expectation values.