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Title: Efficient implementation of the Lanczos method for magnetic systems

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.
Authors:
 [1] ; ;  [2]
  1. Universitaet Bielefeld, Fakultaet fuer Physik, Postfach 100131, D-33501 Bielefeld (Germany), E-mail: jschnack@uni-bielefeld.de
  2. Universitaet Osnabrueck, Fachbereich Physik, D-49069 Osnabrueck (Germany)
Publication Date:
OSTI Identifier:
21159424
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 227; Journal Issue: 9; Other Information: DOI: 10.1016/j.jcp.2008.01.027; PII: S0021-9991(08)00033-8; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; IMPLEMENTATION; MAGNETIC PROPERTIES; MATHEMATICAL SPACE; SPIN