期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 181, 期 6, 页码 1051-1056出版社
ELSEVIER
DOI: 10.1016/j.cpc.2010.02.012
关键词
Gaussian orbitals; Filtration; Diagonalisation/Diagonalization; Rational approximation
资金
- Alexander von Humboldt Foundation
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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