Results 41 to 50 of about 2,318,291 (294)

Quantum chemistry structures and properties of 134 kilo molecules

open access: yesScientific Data, 2014
Computational de novo design of new drugs and materials requires rigorous and unbiased exploration of chemical compound space. However, large uncharted territories persist due to its size scaling combinatorially with molecular size.
R. Ramakrishnan   +4 more
semanticscholar   +1 more source

O ensino de química quântica e o computador na perspectiva de projetos The teaching of quantum chemistry and the computer from the perspective projects

open access: yesQuímica Nova, 2005
This paper aims to discuss and reflect about the use of computers in the teaching of Quantum Chemistry. A course on Computational Quantum Chemistry concentrating on Medicinal Chemistry projects was developed for undergraduate and graduate students.
Agnaldo Arroio   +4 more
doaj   +1 more source

Chemists Without Knowing It?

open access: yesSubstantia, 2022
This paper considers aspects of the chemistry-physics relationship from a historical perspective and with a focus on the entrance of quantum mechanics in twentieth-century chemistry.
Helge Kragh
doaj   +1 more source

The MRCC program system: Accurate quantum chemistry from water to proteins.

open access: yesJournal of Chemical Physics, 2020
MRCC is a package of ab initio and density functional quantum chemistry programs for accurate electronic structure calculations. The suite has efficient implementations of both low- and high-level correlation methods, such as second-order Møller-Plesset (
Mihály Kállay   +16 more
semanticscholar   +1 more source

A Química Quântica na compreensão de teorias de Química Orgânica The Quantum Chemistry in the understanding of theories of Organic Chemistry

open access: yesQuímica Nova, 2010
Quantum chemical calculations were performed in order to obtain molecular properties such as electronic density, dipole moment, atomic charges, and bond lengths, which were compared to qualitative results based on the theories of the organic chemistry ...
Régis Casimiro Leal   +3 more
doaj   +1 more source

Predicting band gaps of semiconductors with quantum chemistry [PDF]

open access: yesEPJ Web of Conferences, 2020
The following article gives a brief introduction to quantum chemistry and its application to the prediction of band gaps of inorganic and organic semiconductors.
Dittmer Anneke
doaj   +1 more source

Gas-phase Chemistry in the Interstellar Medium: The Role of Laboratory Astrochemistry

open access: yesFrontiers in Astronomy and Space Sciences, 2022
“Who” and how? In this simple question the complexity of the interstellar chemistry is encapsulated. “Who” refers to what molecules are present in the interstellar medium (ISM) and “how” to the mechanisms that led to their formation.
Cristina Puzzarini
doaj   +1 more source

Quantum Chemistry Calculations for Metabolomics

open access: yesChemical Reviews, 2021
A primary goal of metabolomics studies is to fully characterize the small-molecule composition of complex biological and environmental samples. However, despite advances in analytical technologies over the past two decades, the majority of small ...
R. Borges   +14 more
semanticscholar   +1 more source

Application of fermionic marginal constraints to hybrid quantum algorithms

open access: yesNew Journal of Physics, 2018
Many quantum algorithms, including recently proposed hybrid classical/quantum algorithms, make use of restricted tomography of the quantum state that measures the reduced density matrices, or marginals, of the full state.
Nicholas C Rubin   +2 more
doaj   +1 more source

Hybrid Quantum-Classical Eigensolver without Variation or Parametric Gates

open access: yesQuantum Reports, 2021
The use of near-term quantum devices that lack quantum error correction, for addressing quantum chemistry and physics problems, requires hybrid quantum-classical algorithms and techniques. Here, we present a process for obtaining the eigenenergy spectrum
Pejman Jouzdani, Stefan Bringuier
doaj   +1 more source

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