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Accelerating self-consistent field convergence with the augmented Roothaan-Hall energy function.

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Date
2010-02-07
Authors
Hu, Xiangqian
Yang, Weitao
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Abstract
Based on Pulay's direct inversion iterative subspace (DIIS) approach, we present a method to accelerate self-consistent field (SCF) convergence. In this method, the quadratic augmented Roothaan-Hall (ARH) energy function, proposed recently by Høst and co-workers [J. Chem. Phys. 129, 124106 (2008)], is used as the object of minimization for obtaining the linear coefficients of Fock matrices within DIIS. This differs from the traditional DIIS of Pulay, which uses an object function derived from the commutator of the density and Fock matrices. Our results show that the present algorithm, abbreviated ADIIS, is more robust and efficient than the energy-DIIS (EDIIS) approach. In particular, several examples demonstrate that the combination of ADIIS and DIIS ("ADIIS+DIIS") is highly reliable and efficient in accelerating SCF convergence.
Type
Journal article
Subject
Acceleration
Biophysics
Computer Simulation
Equipment Design
Image Interpretation, Computer-Assisted
Protein Conformation
Quantum Theory
Permalink
https://hdl.handle.net/10161/3375
Published Version (Please cite this version)
10.1063/1.3304922
Publication Info
Hu, Xiangqian; & Yang, Weitao (2010). Accelerating self-consistent field convergence with the augmented Roothaan-Hall energy function. J Chem Phys, 132(5). pp. 054109. 10.1063/1.3304922. Retrieved from https://hdl.handle.net/10161/3375.
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Scholars@Duke

Yang

Weitao Yang

Philip Handler Distinguished Professor of Chemistry
Prof. Yang, the Philip Handler Professor of Chemistry, is developing methods for quantum mechanical calculations of large systems and carrying out quantum mechanical simulations of biological systems and nanostructures. His group has developed the linear scaling methods for electronic structure calculations and more recently the QM/MM methods for simulations of chemical reactions in enzymes.
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