Optimized implementation of the Lanczos method for magnetic systems

Details Optimized implementation of the Lanczos method for magnetic systems Optimized implementation of the Lanczos method for magnetic systems

2007-06-22

arxiv.org/abs/0706.3293v1

J. Comput. Phys. 227 (2008) 4512-4517

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 2 figues, submitted to Journal of Computational Physics

Scientific paper

10.1016/j.jcp.2008.01.027

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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