2005
DOI: 10.1590/s0103-97332005000700040
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Electromagnetic field in Lyra manifold: a first order approach

Abstract: We discuss the coupling of the electromagnetic field with a curved and torsioned Lyra manifold using the Duffin-Kemmer-Petiau theory. We will show how to obtain the equations of motion and energy-momentum and spin density tensors by means of the Schwinger Variational Principle.

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Cited by 17 publications
(17 citation statements)
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“…The second class of models that we are specially concerned with in this work is the scalar-tensor theories [24][25][26][27]. In these theories, part of the gravitational interaction is described by a scalar field.…”
Section: Introductionmentioning
confidence: 99%
“…The second class of models that we are specially concerned with in this work is the scalar-tensor theories [24][25][26][27]. In these theories, part of the gravitational interaction is described by a scalar field.…”
Section: Introductionmentioning
confidence: 99%
“…Desde a sua concepção, o princípio de ação quântica de Schwinger tem sido utilizado tanto na obtenção de resultados formais sobre a estrutura da teoria quântica quanto em aplicações específicas [13] que demonstram o seu poder de cálculo. Ele foi empregado para se investigar as relações entre spin e estatística que governam as partículas elementares [14], no estudo do acoplamento entre campos em espaços curvos ou torcidos [15][16][17], na investigação do problema de fixação de calibre para quantização de campos [18], na formulação de teorias de gauge de ordem superior [19] e até mesmo na construção de uma versão quaterniônica da mecânica quântica [20]. Uma das primeiras introduções didáticas à formulação de Schwinger para a mecânica quântica foi apresentada em [21].…”
Section: Introductionunclassified
“…The Schwinger action principle was introduced in the context of Quantum Field Theory (Schwinger 1951(Schwinger , 1953a(Schwinger , 1953b(Schwinger , 1953c(Schwinger , 1954a(Schwinger , 1954b and recently has been used to study classical and quantum fields in spacetimes with curvature and torsion (Casana et al 2005(Casana et al , 2006(Casana et al , 2007 or even to investigate the gauge fixing in quantized electromagnetic field . It is worth to emphasize that the choice (2) constitutes a phenomenological model valid within a limited interval of energy (set by the values of the coupling constant β); it does not hold during all the cosmological history (as we shall see) but only for a certain period.…”
Section: Introductionmentioning
confidence: 99%