Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 35: Postersession Transport: Nanoelectronics, Quantum Coherence and Quantum Information, Fluctuations and Noise

TT 35.16: Poster

Mittwoch, 25. März 2009, 14:00–18:00, P1A

Using wave packet propagation to calculate conductivities — •Christoph Kreisbeck¹, Viktor Krückl¹, and Tobias Kramer^1,2 — ¹Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany — ²Department of Physics, Harvard University, Cambridge, MA 02138, USA

The solution of the time dependent Schrödinger equation contains a lot of information about the stationary properties of the system under consideration. To reveal these information we consider the time evolution of a single wave packet and perform the Fourier transform of the autocorrelation function leading to the local density of states (LDOS), which is a key ingredient for the calculation of currents through semiconductor devices. Another way to calculate transport properties is to use flux lines - kind of charge sensors - detecting the energy dependent flux. Using these lines we obtain transmission propabilities, which are closely connected to the conductance, for a whole range of energies from a single wave packet run. In this contribution we illustrate the described technique for a multi-terminal device.