Density functional theory (DFT) is a computational quantum mechanical modelling method used in physics, chemistry and materials science to investigate...
80 KB (10,626 words) - 17:26, 23 June 2025
Time-dependent density-functional theory (TDDFT) is a quantum mechanical theory used in physics and chemistry to investigate the properties and dynamics...
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Electronic band structure (redirect from Band theory)
calculated using density-functional theory (DFT), which is not a model but rather a theory, i.e., a microscopic first-principles theory of condensed matter...
37 KB (4,835 words) - 08:26, 6 July 2025
Spin contamination (section Density functional theory)
applicable to unrestricted Møller–Plesset perturbation theory. Although many density functional theory (DFT) codes simply calculate spin-contamination using...
20 KB (2,825 words) - 10:20, 19 March 2025
Amsterdam Density Functional (ADF) is a program for first-principles electronic structure calculations that makes use of density functional theory (DFT)....
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Quantum chemistry (section Density functional theory)
variety of approaches are used, including semi-empirical methods, density functional theory, Hartree–Fock calculations, quantum Monte Carlo methods, and coupled...
20 KB (2,260 words) - 13:17, 23 May 2025
orbital-free density functional theory (OFDFT) is a quantum mechanical approach to electronic structure determination which is based on functionals of the electronic...
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Lattice density functional theory (LDFT) is a statistical theory used in physics and thermodynamics to model a variety of physical phenomena with simple...
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Hybrid functionals are a class of approximations to the exchange–correlation energy functional in density functional theory (DFT) that incorporate a portion...
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while the inverse quantity is referred to as elastic modulus. Density functional theory (DFT) provides reliable methods for determining several forms...
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electron correlation. A similar theorem (Janak's theorem) exists in density functional theory (DFT) for relating the exact first vertical ionization energy...
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applying the density functional theory (DFT) or Hartree–Fock (HF) models to the Schrödinger equation. Molecular orbital theory and valence bond theory are the...
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notably in 1998 and 2013. Walter Kohn, "for his development of the density-functional theory", and John Pople, "for his development of computational methods...
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Local-density approximations (LDA) are a class of approximations to the exchange–correlation (XC) energy functional in density functional theory (DFT)...
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Hartree–Fock method (redirect from Hartree-Fock theory)
alternative to Hartree–Fock calculations used in some cases is density functional theory, which treats both exchange and correlation energies, albeit approximately...
31 KB (4,739 words) - 23:21, 4 July 2025
Kohn–Sham equations (redirect from Kohn-Sham density functional theory)
molecular scale. In physics and quantum chemistry, specifically density functional theory, the Kohn–Sham equation is the non-interacting Schrödinger equation...
7 KB (1,027 words) - 10:55, 6 April 2025
to its balance of computational cost and predictive capability density functional theory (DFT) has the most significant use in materials science. DFT most...
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Minnesota Functionals (Myz) are a group of highly parameterized approximate exchange-correlation energy functionals in density functional theory (DFT). They...
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density functional theory, which made it possible to calculate quantum mechanical electronic structure by equations involving the electronic density (rather...
22 KB (1,949 words) - 22:32, 12 April 2025
Conversely, the density determines the wave function modulo up to a phase factor, providing the formal foundation of density functional theory. According to...
16 KB (2,300 words) - 18:48, 21 November 2024
to what MP pertubation theory is in HF theory is Görling-Levy (GL) pertubation theory in Kohn-Sham (KS) density functional theory (DFT). Electron correlation...
23 KB (2,899 words) - 04:03, 13 June 2025
represent the electronic wave function in the Hartree–Fock method or density-functional theory in order to turn the partial differential equations of the model...
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Q-Chem (section Density functional theory)
workstations to midsize clusters, HPCC, and cloud computing using density functional and wave-function based approaches. It offers an integrated graphical...
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Many-body problem (redirect from Many-body theory)
interaction Coupled cluster Various Monte-Carlo approaches Density functional theory Lattice gauge theory Matrix product state Neural network quantum states Numerical...
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Thomas–Fermi model (redirect from Thomas-Fermi theory)
function theory as being formulated in terms of the electronic density alone and as such is viewed as a precursor to modern density functional theory. The...
16 KB (2,517 words) - 22:46, 19 June 2025
In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods...
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three-dimensional space. The Fukui function allows one to predict, using density functional theory, where the most electrophilic and nucleophilic sites of a molecule...
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Phases of ice (redirect from Low density amorphous ice)
ordering in ice VI was predicted several times; for example, density functional theory calculations predicted the phase transition temperature is 108...
137 KB (15,380 words) - 20:47, 4 July 2025
many-body effects encoded in the wave function, going beyond mean-field theory. In particular, there exist numerically exact and polynomially-scaling algorithms...
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John Perdew (section Work in density functional theory)
fields of solid-state physics and quantum chemistry. His work on density functional theory has led to him being one of the world's most cited physicists...
12 KB (1,217 words) - 02:47, 9 March 2025