Results 31 to 40 of about 596,267 (361)

Density functional theory: An introduction [PDF]

open access: yesAmerican Journal of Physics, 2000
Density functional theory (DFT) is one of the most widely used methods for ab initio calculations of the structure of atoms, molecules, crystals, surfaces, and their interactions. Unfortunately, the customary introduction to DFT is often considered too lengthy to be included in various curricula.
Argaman, Nathan, Makov, Guy
openaire   +2 more sources

Relativistic density functional theory in nuclear physics

open access: yesAAPPS Bulletin, 2021
Over the past decades, the relativistic density functional theory has been greatly developed and widely applied to investigate a variety of nuclear phenomena.
Jie Meng, Pengwei Zhao
doaj   +1 more source

Localized Active Space Pair-Density Functional Theory

open access: yes, 2021
Accurate quantum chemical methods for the prediction of spin-state energy gaps for strongly correlated systems are computationally expensive and scale poorly with the size of the system.
Matthew R., Hermes   +4 more
core   +1 more source

A Density Functional Theory for the Average Electron Energy

open access: yes, 2022
A formally exact density functional theory (DFT) determination of the average electron energy is presented. Our theory, which is based on a different accounting of energy functional terms, partially solves one well known downside of conventional Kohn ...
Stefano, Racioppi   +3 more
core   +1 more source

Constrained Density Functional Theory [PDF]

open access: yesChemical Reviews, 2011
National Science Foundation (U.S.) (Grant CHE-1058219)
Kaduk, Benjamin James   +2 more
openaire   +2 more sources

Density Matrix Embedding Using Multiconfiguration Pair-Density Functional Theory

open access: yes, 2023
We present a quantum embedding method for ground and excited states of extended systems that uses multiconfiguration pair-density functional theory (MC-PDFT) with densities provided by periodic density matrix embedding theory (pDMET).
Matthew , Hermes   +2 more
core   +1 more source

Implicit density-functional theory [PDF]

open access: yesPhysical Review A, 2006
A fermion ground state energy functional is set up in terms of particle density, relative pair density, and kinetic energy tensor density. It satisfies a minimum principle if constrained by a complete set of compatibility conditions. A partial set, which thereby results in a lower bound energy under minimization, is obtained from the solution of model ...
Liu, Bin, Percus, Jerome K.
openaire   +2 more sources

Existence and convergence results for the Galerkin approximation of an electronic density functional [PDF]

open access: yes, 2010
We formulate and analyze a model for the study of finite clusters of atoms or localized defects in infinite crystals based on orbital-free density functional theory.
CHRISTOPH ORTNER   +8 more
core   +1 more source

Repulsively diverging gradient of the density functional in the reduced density matrix functional theory

open access: yesNew Journal of Physics, 2021
The reduced density matrix functional theory (RDMFT) is a remarkable tool for studying properties of ground states of strongly interacting quantum many body systems.
Tomasz Maciążek
doaj   +1 more source

A checkup on density functional theory [PDF]

open access: yesScience, 2017
Theoretical Chemistry Density functional theory has extended the reach of computational chemistry to a large range of compounds that were previously intractable to simulation. However, a recent study on a test set of neutral and charged atoms suggested that new functionals have lately been targeting more accurate energy calculations at the expense of ...
openaire   +2 more sources

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