Adaptive Energy Integration of Non-Equilibrium Green’s Functions

O. Baumgartner, M. Karner, S. Holzer, M. Pourfath, T. Grasser, H. Kosina
To obtain the physical quantities of interest within the non-equilibrium Green’s function formalism, numerical integration over energy space is essential. Several adaptive methods have been implemented and tested for their applicability. The number of energy grid points needed and the convergence behaviour of the Schrödinger-Poisson iteration have been evaluated. An adaptive algorithm based on a global error criterion proved to be more efficient than a local adaptive algorithm.
Publication date: 19 May 2007
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