Results 41 to 50 of about 239,615 (282)

Particle-Number Projection and the Density Functional Theory

open access: yes, 2007
In the framework of the Density Functional Theory for superconductors, we study the restoration of the particle number symmetry by means of the projection technique. Conceptual problems are outlined and numerical difficulties are discussed.
D. M. Brink   +7 more
core   +1 more source

Relationships between charge density response functions, exchange holes and localized orbitals [PDF]

open access: yes, 2015
The charge density response function and the exchange hole are closely related to each other via the fundamental fluctuation-dissipation theorem of physics.
Mussard, Bastien, Ángyán, János G.
core   +3 more sources

The Woodward–Hoffmann Rules Reinterpreted by Conceptual Density Functional Theory

open access: yesAccounts of Chemical Research, 2012
In an attempt to master the overwhelming amount of data on the properties of substances and their reactions, chemists scrutinize them for underlying common patterns. In modern times quantum mechanics (QM) has played a leading role in the understanding of chemical reactivity.
Geerlings, Paul   +4 more
openaire   +5 more sources

Rigorous Density Functional Theory for Inhomogeneous Bose-Condensed Fluids

open access: yes, 1995
The density functional theory originally developed by Hohenberg, Kohn and Sham provides a rigorous conceptual framework for dealing with inhomogeneous interacting Fermi systems.
Griffin, A.
core   +1 more source

Applying trait-based models to achieve functional targets for theory-driven ecological restoration [PDF]

open access: yes, 2014
Manipulating community assemblages to achieve functional targets is a key component of restoring degraded ecosystems. The response-and-effect trait framework provides a conceptual foundation for translating restoration goals into functional trait targets,
Laughlin, Daniel C.
core   +2 more sources

Unveiling the Different Chemical Reactivity of Diphenyl Nitrilimine and Phenyl Nitrile Oxide in [3+2] Cycloaddition Reactions with (R)-Carvone through the Molecular Electron Density Theory

open access: yesMolecules, 2020
The [3+2] cycloaddition (32CA) reactions of diphenyl nitrilimine and phenyl nitrile oxide with (R)-carvone have been studied within the Molecular Electron Density Theory (MEDT). Electron localisation function (ELF) analysis of these three-atom-components
Mar Ríos-Gutiérrez   +4 more
doaj   +1 more source

Chemical Reactivity and Optical and Pharmacokinetics Studies of 14 Multikinase Inhibitors and Their Docking Interactions Toward ACK1 for Precision Oncology

open access: yesFrontiers in Chemistry, 2022
Activated Cdc42-associated kinase 1 (ACK1/TNK2) has a significant role in cell endocytosis, survival, proliferation, and migration. Mutations in ACK1 are closely associated with the occurrence and development of cancers.
Ruby Srivastava
doaj   +1 more source

Linking entanglement and quantum phase transitions via density functional theory

open access: yes, 2007
Density functional theory (DFT) is shown to provide a novel conceptual and computational framework for entanglement in interacting many-body quantum systems.
D. A. Lidar   +7 more
core   +1 more source

Grand Canonical Adaptive Resolution Simulation for Molecules with Electrons: A Theoretical Framework based on Physical Consistency [PDF]

open access: yes, 2017
A theoretical scheme for the treatment of an open molecular system with electrons and nuclei is proposed. The idea is based on the Grand Canonical description of a quantum region embedded in a classical reservoir of molecules.
Bing Zhang (129)   +9 more
core   +2 more sources

Effect of uniaxial strain on the site occupancy of hydrogen in vanadium from density-functional calculations

open access: yes, 2014
We investigate the influence of uniaxial strain on site occupancy of hydrogen vanadium, using density functional theory. The site occupancy is found to be strongly influenced by the strain state of the lattice.
Ahuja, Rajeev   +4 more
core   +1 more source

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