The functional renormalization group: a novel approach to transport through quantum dots

Volker Meden

Universität Göttingen

A novel approach to study transport through quantum dots with local Coulomb correlations is applied to a variety of simple and more complex systems of quantum dots. It is based on a truncated functional renormalization group scheme. For certain cases the approximate results are compared to high precision numerical renormalization group data. This shows that the method works well for surprisingly large interactions. It is technically simple and can easily be appiled to systems with many dot degrees of freedom. New correlation effects are uncovered for parallel double-dots and a single multi-level dot. description: correlation effects in low dimensional electron systems, transport through quantum wires and dots


1) "Correlation induced resonances in transport through coupled quantum dots" V. Meden and F. Marquardt, cond-mat/0510686
2) "Junction of three quantum wires: Restoring time-reversal symmetry by interaction" X. Barnabe-Theriault, A. Sedeki, V. Meden, and K. Schönhammer, Phys. Rev. Lett. 94, 136405 (2005)
3) "Correlation effects on resonant tunneling in one-dimensional quantum wires" V. Meden, T. Enss, S. Andergassen, W. Metzner, and K. Schönhammer, Phys. Rev. B 71, 041302(R) (2005)