Results 21 to 30 of about 156,250 (254)

Can We See the Energy Densities? II. Insights from Linear-Response Time-Dependent Density Functional Theory Calculations

open access: yes, 2020
Inspired by the analysis of Kohn-Sham energy densities by Nakai et al, we extended the energy density analysis to linear-response time-dependent density functional theory (LR-TDDFT) calculations.
Qin, Wu   +9 more
core   +1 more source

Kohn-Sham Time-Dependent Density Functional Theory on the Massively Parallel Graphics Processing Units

open access: yes, 2022
We report a high-performance multi graphics processing unit (GPU) implementation of the Kohn-Sham time-dependent density functional theory (TDDFT) within the Tamm-Dancoff approximation.
Hyungjin, Kim   +9 more
core   +1 more source

Fragment-Based Time-Dependent Density Functional Theory

open access: yesPhysical Review Letters, 2013
Using the Runge-Gross theorem that establishes the foundation of Time-dependent Density Functional Theory (TDDFT) we prove that for a given electronic Hamiltonian, choice of initial state, and choice of fragmentation, there is a unique single-particle potential (dubbed time-dependent partition potential) which, when added to each of the pre-selected ...
Mosquera, Martin A.   +2 more
openaire   +4 more sources

Exact subsystem time-dependent density-functional theory [PDF]

open access: yesThe Journal of Chemical Physics, 2019
In this communication, we show that coupled subsystem time-dependent density functional theory (subsystem TDDFT) [J. Neugebauer, J. Chem. Phys. 126, 134116 (2007)] in combination with projection-based embedding (PbE) is an exact subsystem theory in the sense that supermolecular TDDFT excitation energies can exactly be restored.
Johannes Tölle   +2 more
openaire   +2 more sources

Linear-scaling time-dependent density-functional theory [PDF]

open access: yes, 2003
A linear-scaling time-dependent density-functional theory is developed to evaluate the optical response of large molecular systems. The two-electron Coulomb integrals are evaluated with the fast multipole method, and the calculation of exchange ...
Yokojima, S, Yam, CY, Chen, G
core   +1 more source

Time-dependent density functional theory for periodic systems [PDF]

open access: yes, 2001
In this thesis the time-dependent version of density functional theory is described, which has been developed for crystalline non-metallic systems with periodicity in one to three dimensions.
Kootstra, Freddie,, Kootstra, Freddie
core  

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

open access: yesFEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva   +5 more
wiley   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Conserving approximations in time-dependent density functional theory [PDF]

open access: yesPhysical Review B, 2005
In the present work we propose a theory for obtaining successively better approximations to the linear response functions of time-dependent density or current-density functional theory. The new technique is based on the variational approach to many-body perturbation theory (MBPT) as developed during the sixties and later expanded by us in the mid ...
von Barth, U   +3 more
openaire   +3 more sources

Size-Dependent Errors in Real-Time Electron Density Propagation

open access: yes, 2023
Real-time (RT) electron density propagation with time-dependent density functional theory (TDDFT) or Hartree-Fock (TDHF) is one of the most popular methods to model the charge transfer in molecules and materials. However, both RT-TDHF and RT-TDDFT within
Karnamohit, Ranka, Christine M., Isborn
core   +1 more source

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