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A constrained optimization algorithm for total energy minimization in electronic structure calculations
- Source :
-
Journal of Computational Physics . Sep2006, Vol. 217 Issue 2, p709-721. 13p. - Publication Year :
- 2006
-
Abstract
- Abstract: A new direct constrained optimization algorithm for minimizing the Kohn–Sham (KS) total energy functional is presented in this paper. The key ingredients of this algorithm involve projecting the total energy functional into a sequence of subspaces of small dimensions and seeking the minimizer of total energy functional within each subspace. The minimizer of a subspace energy functional not only provides a search direction along which the KS total energy functional decreases but also gives an optimal “step-length” to move along this search direction. Numerical examples are provided to demonstrate that this new direct constrained optimization algorithm can be more efficient than the self-consistent field (SCF) iteration. [Copyright &y& Elsevier]
- Subjects :
- *ELECTRONIC structure
*ALGORITHMS
*ATOMIC structure
*ENERGY-band theory of solids
Subjects
Details
- Language :
- English
- ISSN :
- 00219991
- Volume :
- 217
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Computational Physics
- Publication Type :
- Academic Journal
- Accession number :
- 22418968
- Full Text :
- https://doi.org/10.1016/j.jcp.2006.01.030