Results 241 to 250 of about 1,006,885 (295)

Experimental methods in chemical engineering: Density functional theory

The Canadian Journal of Chemical Engineering, 2021
AbstractDensity functional theory (DFT) computations apply to physics, chemistry, material science, and engineering. In chemical engineering, DFT identifies material structure and properties, and mechanisms for phenomena such as chemical reaction and phase transformation that are otherwise impossible to measure experimentally. Even though its practical
Hasan Al‐Mahayni   +4 more
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Density‐functional tight binding—an approximate density‐functional theory method

WIREs Computational Molecular Science, 2012
AbstractIn this paper, we review the foundations of the density‐functional tight‐binding (DFTB) method. The method is based on the density‐functional theory as formulated by Hohenberg and Kohn. It introduces several approximations: First, densities and potentials are written as superpositions of atomic densities and potentials.
Gotthard Seifert, Jan‐Ole Joswig
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Numerical methods for Kohn–Sham density functional theory

Acta Numerica, 2019
Kohn–Sham density functional theory (DFT) is the most widely used electronic structure theory. Despite significant progress in the past few decades, the numerical solution of Kohn–Sham DFT problems remains challenging, especially for large-scale systems.
Lin, Lin, Lu, Jianfeng, Ying, Lexing
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Evolution-operator method for density functional theory

Physical Review B, 2007
We describe an implementation of density functional theory that is formulated fully in configuration space, where all wave functions, densities, and potentials are represented on a grid. Central to the method is a fourth-order factorization of the evolution operator for the Kohn-Sham Hamiltonian.
E. R. Hernández   +3 more
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Transition functional method in the density-functional theory

Physical Review A, 1996
Based on functional expansions developed recently, transition functional method is introduced. This method can be considered a functional generalization of Slater's transition-state method. It can be used to calculate energy differences accurately. \textcopyright{} 1996 The American Physical Society.
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A Proximal Gradient Method for Ensemble Density Functional Theory

SIAM Journal on Scientific Computing, 2015
Summary: The ensemble density functional theory (E-DFT) is valuable for simulations of metallic systems due to the absence of a gap in the spectrum of the Hamiltonian matrices. Although the widely used self-consistent field (SCF) iteration method can be extended to solve the minimization of the total energy functional with respect to orthogonality ...
Ulbrich, Michael   +4 more
openaire   +2 more sources

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