Dresden 2006 – scientific programme

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TT: Tiefe Temperaturen

TT 20: Transport: Nanoelectronics I - Quantum Dots, Wires, Point Contacts - Part 2

TT 20.3: Talk

Tuesday, March 28, 2006, 14:45–15:00, HSZ 105

Non-Equilibrium Dynamics in Donor-Bridge-Acceptor Systems: A time dependent Numerical Renormalization Group Study — •Sabine Tornow¹, Ralf Bulla¹, and Frithjof Anders² — ¹Theoretische Physik III, Elektronische Korrelationen und — ²Institut für Theoretische Physik

We investigate the relaxation dynamics of multiple electrons in a donor-bridge-acceptor system (DBA) with a coupling of the electronic degrees of freedom to a common bosonic bath. The model allows to study many-particle effects and the influence of the local and non-local Coulomb interactions. Non-perturbative methods are needed to calculate the non-equilbrium and equilibrium properties in the full parameter space. We are using the time dependent Numerical Renormalization Group to calculate transfer rates. Furthermore we discuss the possibility of many-particle (bipolaronic) and Coulomb-assisted transfer. .