Low‐memory iterative density fitting
Low‐memory iterative density fitting
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低内存迭代密度拟合
DOI:
10.1002/jcc.23961
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发表时间:
2015
影响因子:
3
通讯作者:
Grajciar
中科院分区:
文献类型:
--
作者:
Grajciar
A new low‐memory modification of the density fitting approximation based on a combination of a continuous fast multipole method (CFMM) and a preconditioned conjugate gradient solver is presented. Iterative conjugate gradient solver uses preconditioners formed from blocks of the Coulomb metric matrix that decrease the number of iterations needed for convergence by up to one order of magnitude. The matrix‐vector products needed within the iterative algorithm are calculated using CFMM, which evaluates them with the linear scaling memory requirements only. Compared with the standard density fitting implementation, up to 15‐fold reduction of the memory requirements is achieved for the most efficient preconditioner at a cost of only 25% increase in computational time. The potential of the method is demonstrated by performing density functional theory calculations for zeolite fragment with 2592 atoms and 121,248 auxiliary basis functions on a single 12‐core CPU workstation. © 2015 Wiley Periodicals, Inc.
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DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
J. Pérez;Weitao Yang
通讯作者:
Weitao Yang
影响因子:
2.3
作者:
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通讯作者:
Ros, P.
DOI:
10.1137/1.9780898718003
发表时间:
2003-05
期刊:
--
影响因子:
--
作者:
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通讯作者:
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影响因子:
4.4
作者:
TREUTLER, O;AHLRICHS, R
通讯作者:
AHLRICHS, R
影响因子:
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