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O: Fachverband Oberflächenphysik

O 4: Transport: Quantum Dots, Quantum Wires, Point Contacts I (TT jointly with O)

O 4.3: Vortrag

Montag, 31. März 2014, 10:00–10:15, BEY 81

Kwant - a software package for quantum transport — •Michael Wimmer¹, Christoph Groth², Anton Akhmerov¹, and Xavier Waintal² — ¹TU Delft, The Netherlands — ²CEA Grenoble, France

Computing transport properties numerically is a problem that appears in many different areas of physics. I will present a wave-function based approach to computing transport properties in non-interacting tight-binding systems that scales more favourably than standard algorithms such as the recursive Green’s function algorithm.

We have implemented this method in an open-source software package Kwant based on the python language. It allows for an easy definition of arbitrary tight-binding problems using intuitive concepts ("like writing the problem on the blackboard"), and allows to compute transport properties such as the conductance, but also local properties such as electron densities. The software package itself together with extensive documentation, tutorials and examples of research where Kwant has already been used can be found at www.kwant-project.org.
C. W. Groth, M. Wimmer, A. R. Akhmerov, X. Waintal. arXiv:1309.2926 (2013)