Momentum Representation
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. On the inverse problem in high-energy elastic hadron scattering and the applicability of a representation for the real part of the amplitude / Um estudo sobre o problema inverso do espalhamento elastico de hadrons em altas energias e a aplicabilidade de uma representacao para a parte real da amplitude
The theoretical description of high-energy elastic hadron scattering constitutes an open problem in both, the underlying quantum field theory of strong interactions (QCD) and the phenomenological context. In this work the inverse problem in elastic hadron scattering is discussed in the impact parameter and eikonal frameworks, specifically a study on the empi
Publicado em: 2010
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2. Modelos da Química Quântica no espaço de momento: diferentes representações de um mesmo sistema
The conventional approach to simple quantum chemistry models is contrasted with that known as momentum representation, where the wavefunctions are momentum dependent. Since the physical interactions are the same, state energies should not change, and whence the energy differences correlating with the real world as spectral lines or bands. We emphasize that o
Química Nova. Publicado em: 2009
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3. Analytical, empirical and phenomenological aspects of elastic hadron scattering at high energies / Aspectos analiticos, empiricos e fenomenologicos do espalhamento elastico de hadrons em altas energias
We investigate high-energy elastic hadron scattering by means of three different approaches: analytical, empirical, and phenomenological. The first one is characterized by the fundamental principles of analyticity and crossing symmetry, polynomial limits for the scattering amplitude and dispersion relations. In special, for classes of functions of physical i
Publicado em: 2009
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4. Mecânica de suspensões magnéticas diluídas
This work concerns with an investigation of the dynamics of dilute suspensions composed by magnetic particles, considering microstructural and macroscopic aspects of this particulate systems. From the microstructure, it is known that magnetostatic attraction may lead to formation of aggregates in magnetic suspensions. In this way, numerical simulations have
Publicado em: 2009
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5. Espaço do momento: modelos da química quântica / Momentum Space: Quantum Chemistry Models
In a conventional course in Quantum Chemistry, the models usually presented to illustrate the use of some quantum mechanical tools that are relevant for a comprehension of the structure of matter at the atomic and molecular levels are approached in a way that has been termed, in a more formal presentation, as position representation. In this representation,
Publicado em: 2008
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6. Suscetibilidades de carga e spin para uma superfície de fermi chata bidimensional
In this work we investigate the charge and spin instabilities of a two-dimensional model (d=2) of strongly interacting electrons in the presence of a at Fermi surface (FS) by using the renormalization group theory (RG). Bearing in mind the strong electronic repulsions in the cuprates superconductors, we try to relate our model to the repulsive Hubbard model
Publicado em: 2006
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7. Critical Analyse of Dynamical of Quantum Pendular Cavity / Análise Crítica da Dinâmica de uma Cavidade Pendular Quântica
We perform a quantum mechanical analysis of a pendular cavity, using the positive-P representation, showing that the quantum state of the moving mirror, a microscopic object, has noticeable eects on the dynamics. This system was previously been proposed as a candidate for the quantum-limited measurement of small displacements os the mirror due to radiation p
Publicado em: 2004
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8. Distribuição de fases de escoamento a bolhas em duto de secção quadrada atraves de curva de 180º no plano vertical / Phase segregation in bubbly flow in square section duct inside a 180 degree vertical plan curve
The phase segregation in gas-liquid bubbly flow taking place inside a 180 degree plane curve, i.e., with null torsion, is the subject of this work. Both experimental and numerical approaches have been performed. Thus, aspects as the influence of intensity of centrifugal field on phase segregation, the role played by turbulence on phase segregation and detail
Publicado em: 2004
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9. No limiar do silêncio e da letra: traços da autoria em Clarice Lispector / On the threshold of silence and letter: traces of authorship in Clarice Lispector
The field of literature is the field of mimesis. So that it occurs, an object suitable for depiction, a subject that performs it and a language that makes it viable as well as a reader to receive it are imperative. The object to be re-created can be real or virtual and the means for its re-creation is the word. Words aimed at reaching beyond the threshold of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/12/2001
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10. Simulação numerica de escoamento bifasicos a bolhas e pistonado usando um metodo Euleriano-Lagrangeano
A model to predict the behaviour of vertical two-phase flow regimes, such as bubbles and slug flow has been proposed, using a Lagrangian representation of the discrete phase and a Eulerian representation of the continuous phase. Each bubble is modeled individually through three equations: the mass and the momentum balance equations and the bubble position eq
Publicado em: 1993