Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 103: Transport: Poster Session

TT 103.7: Poster

Donnerstag, 19. März 2015, 15:00–18:00, Poster B

Charge and Energy Transport through Quantum Dots — •Christian Schiegg, Michael Dzierzawa, and Ulrich Eckern — Institute of Physics, University of Augsburg, 86135 Augsburg, Germany

We consider a model of interacting spinless fermions coupled to non-interacting leads. Initially a non-equilibrium situation is imposed by applying a bias voltage and temperature gradient across the system. The time-evolution of the density matrix leads to a quasi-stationary state from which charge and energy currents can be extracted. Numerical results based on the time-dependent Hartree-Fock approximation are compared with exact currents obtained from discrete Hubbard-Stratonovich decoupling of the interaction for small systems. For a wide range of parameters the time-evolution of the currents is reasonably well described within the Hartree-Fock approach.