Quantum Correlations
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. SYNTHESIS, ELECTRONIC AND SPECTRAL PROPERTIES OF NEW 1,3,4-THIADIAZOLE COMPOUNDS AND THE SPECTRAL ANALYSIS OF THEIR CONFORMERS USING DENSITY FUNCTIONAL THEORY
In this study, new 1,3,4-thiadiazole compounds were synthesised and characterised by FT-IR, 1H-NMR, UV-vis spectroscopy and elemental analysis, Furthermore, the relationship between the electronic and spectral data of the 16 conformers of each compound was investigated by theoretical calculations; the theoretical data were compared with the experimental resu
Quím. Nova. Publicado em: 2019-02
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2. O MÉTODO DE HYLLERAAS PARA ÁTOMOS DE DOIS ELÉTRONS
The quantum mechanics of two electrons atoms, as suggested by E. A. Hylleraas in the period between 1928-1930, is discussed in the present work. Hylleraas introduced explicit correlations in the wavefunction by treating the coordinates between the electrons as an independent variable of the problem, an approach that gives very precise energy values. Solution
Quím. Nova. Publicado em: 2017-10
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3. COMPUTATIONAL STUDY OF THE INTERACTION BETWEEN INDENE PYRAZOLE AND CYCLIN DEPENDENT KINASE 2
Proteins have been traditionally out of reach of electronic structure methods. But with technological advances in the development of powerful computers and the need to extend the methods of computational chemistry to problems of biological interest, such as the rational design of drugs, new technologies in silico have been developed that allow to study conde
Quím. Nova. Publicado em: 2017-05
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4. The Correlation Between Electronic Structure and Antimalarial Activity of Tetrahydropyridines
In this study, correlations between electronic structure and the antimalarial activities reported for a group of 21 tetrahydropyridines were evaluated by multivariate methods. Simple and multiple linear regressions, principal component analyses, and linear discriminant analyses were employed to evaluate possible correlations between quantum-mechanical descri
J. Braz. Chem. Soc.. Publicado em: 2015-02
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5. Termalização e correlações quânticas nos contextos de sistemas quânticos abertos e cadeias de spins
In this thesis, we study the behavior of Quantum Discord in the contexts of open quantum systems and spin chains. Furthermore, we investigate the thermalization process of a spin chain due to interaction with the environment. First, we present a review on the concept of quantum correlation, beginning with the first ideas on non-locality, and leading to the m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/01/2013
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6. Quantum correlations between two oscillators connected by a time-dependent coupling / Correlações quânticas entre dois osciladores conectados por um acoplamento dependente do tempo
Neste trabalho analisamos a dinâmica das correlações quânticas em um sistema composto por dois osciladores harmônicos em contato com um mesmo reservatório térmico e acoplados entre si com um acoplamento dependente do tempo. O reservatório térmico modelado de acordo com o modelo de Caldeira-Leggett e tanto a abordagem via integrais de caminho quanto
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2012
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7. Controle de Corrente de Spin em Pontos Quânticos na Presença de Tensões de Porta Moduladas no Tempo
Since Loss &DiVincenzo proposal to use confined electron spins in quantum dots (QDs) as a building block for qubits in solid state systems, spin-dependent transport in QDs has attracted a lot of attention. The interest for this system increased even further with the recent experimental developments to coherently control (initialization-manipulation-read out)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2011
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8. Exact photocount statistics : lasers near threshold
A previously constructed laser model with quantum (noncommuting) noise sources was shown to lead near threshold to a quantum rotating-wave Van der Pol oscillator. A full dynamical correspondence between quantum and classical random processes allows one to compute the average of any time-ordered, normal-ordered operator function by averaging the associated fu
Publicado em: 2011
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9. Andreev transport in double quantum dots coupled to superconductor and ferromagnetic leads / Transporte por reflexão de Andreev em pontos quanticos duplos acoplados a eletrodos supercondutores e ferromagneticos
In this work we studied the quantum transport in two hybrid nanostructures composed of double quantum dots (DQD)s coupled to superconductor (S) and ferromagnetic (F) leads. The first nanostructure, denoted by F - QDa - QDb - S, is composed of a ferromagnet, two quantum dots, and a superconductor connected in series. In the second nanostructure, denoted by (
Publicado em: 2010
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10. Classical and quantum correlations under decoherence / Correlações clássicas e quânticas sob decoerência
Recently, in the context of discrete variables, the existence of quantum correlations that are more general than entanglement was identified. We may conjecture that these correlations are a very important resource in quantum information science and in some areas of physics. However, this fragile resource is quickly destroyed by the decoherence process. In th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2009
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11. Multicolor Quantum Correlations in the Optical Parametric Oscillator / Correlações quânticas multicolores no oscilador paramétrico ótico
We have investigated the collective quantum properties of the three bright light beams produced by an optical parametric oscillator (OPO) operating above threshold, named pump, signal, and idler. We have analyzed experimentally their intensity and phase quantum fluctuations, and how they are correlated. For the first time, we have observed the existence of p
Publicado em: 2008
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12. Excesso de ruído no oscilador paramétrico ótico / Excess noise in optical parametric oscillator
In spite of the fact that the Optical Parametric Oscillator (OPO) is one of the most known experiments related with quantum information research, its experimental results did not have a good agreement with the theory, in the above threshold regime, because of an unexpected excess noise in the phase quadrature on its beams. In this work we sistematicaly prese
Publicado em: 2008