Journal
COMPUTER PHYSICS COMMUNICATIONS
Volume 181, Issue 6, Pages 1051-1056Publisher
ELSEVIER
DOI: 10.1016/j.cpc.2010.02.012
Keywords
Gaussian orbitals; Filtration; Diagonalisation/Diagonalization; Rational approximation
Funding
- Alexander von Humboldt Foundation
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In a recent work [M J Rayson, PR Briddon, Phys Rev B 80 (2009) 205104] an implementation of filter diagonalisation with localisation constraints was shown to provide an accurate and highly efficient method to solve the Kohn-Sham equations using a primitive Gaussian basis for systems containing several thousand electrons In this work, an alternative filtration algorithm is proposed, based on a rational approximation to the filtration function, to replace the kernel of this algorithm This approach is considerably faster than the diagonalisation approach used previously and also its performance is largely independent of the filtration temperature, aiding a more flexible approach to the construction of filtered basis sets (C) 2010 Elsevier BV All rights reserved
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