Berlin 2005 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Posters Transport
TT 8.53: Poster
Freitag, 4. März 2005, 14:00–18:00, Poster TU C
Linear response approach to conductance of strongly correlated 1D systems: A DMRG study — •Dan Bohr1,2 and Peter Schmitteckert2 — 1Department of Micro and Nanotechnology, Technical University of Denmark, DK-2800 Kgs. Lyngby — 2Institut für Theorie der Kondensierten Materie,Universität Karlsruhe, D-76128 Karlsruhe
The calculation of transport properties has received much attention over the years. Recently improved experimental techniques has renewed the interest for studying transport properties of strongly correlated 1D quantum systems. We study the conductance through 1D interacting lattice systems using the Kubo formalism for conductance. In this work we calculate the conductance for the well-known non-interacting system, coupled to leads, as well as fully interacting systems coupled to leads. The first serves as a benchmark for the performance of DMRG (density matrix renormalization group) in this context as well as clarifying the finite size scaling needed to extract meaningfull results. We show that indeed DMRG can be used successfully in such calculations, and consider the accuracy of this approach.