Efficient implementation of the Lanczos method for magnetic systems |
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| Authors: | Jürgen Schnack Peter Hage Heinz-Jürgen Schmidt |
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| Institution: | 1. Universität Bielefeld, Fakultät für Physik, Postfach 100131, D-33501 Bielefeld, Germany;2. Universität Osnabrück, Fachbereich Physik, D-49069 Osnabrück, Germany |
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| Abstract: | Numerically exact investigations of interacting spin systems provide a major tool for an understanding of their magnetic properties. For medium size systems the approximate Lanczos diagonalization is the most common method. In this article we suggest two improvements: efficient basis coding in subspaces and simple restructuring for openMP parallelization. |
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