Results 51 to 60 of about 2,867,791 (321)

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

Simulating chemistry using quantum computers [PDF]

open access: yes, 2010
The difficulty of simulating quantum systems, well-known to quantum chemists, prompted the idea of quantum computation. One can avoid the steep scaling associated with the exact simulation of increasingly large quantum systems on conventional computers ...
Alejandro Perdomo-Ortiz   +14 more
core   +2 more sources

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

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

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

Quantum dot-labelled polymer beads by suspension polymerisation [PDF]

open access: yes, 2003
CdSe quantum dots with polymerisable ligands have been incorporated into polystyrene beads, via a suspension polymerisation reaction, as a first step towards the optical encoding of solid supports for application in solid phase organic ...
Cummins, Siobhan S.   +7 more
core   +2 more sources

Aspects of integrability in a classical model for non-interacting fermionic fields [PDF]

open access: yes, 2015
In this work we investigate the issue of integrability in a classical model for noninteracting fermionic fields. This model is constructed via classical-quantum correspondence obtained from the semiclassical treatment of the quantum system.
Engl, Thomas   +3 more
core   +2 more sources

Quantum Chemistry Common Driver and Databases (QCDB) and Quantum Chemistry Engine (QCEngine): Automation and interoperability among computational chemistry programs.

open access: yesJournal of Chemical Physics, 2021
Community efforts in the computational molecular sciences (CMS) are evolving toward modular, open, and interoperable interfaces that work with existing community codes to provide more functionality and composability than could be achieved with a single ...
Daniel G. A. Smith   +47 more
semanticscholar   +1 more source

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