Optimized implementation of the Lanczos method for magnetic systems
classification
❄️ cond-mat.str-el
cond-mat.stat-mech
keywords
systemslanczosmagneticmethodapproximatearticlebasiscoding
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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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