Electromagnetism in a nonsymmetric theory of gravitation

Ragusa, S.; Bosquetti, Diógenes

doi:10.1590/s0103-97332000000300014

Cited by 4 publications

(11 citation statements)

References 4 publications

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“…In [2] the electromagnetic field was included into the theory. It will be interesting to extend the result studied here to the case in which the electromagnetic field is also present.…”

Section: Discussionmentioning

confidence: 99%

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Metric nonsymmetric theory of gravitation: the analogue of the theorem of Birkhoff

Ragusa¹,

Bosquetti²

2006

Braz. J. Phys.

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“…In [2] the electromagnetic field was included into the theory. It will be interesting to extend the result studied here to the case in which the electromagnetic field is also present.…”

Section: Discussionmentioning

confidence: 99%

“…The theory was shown to be consistent with the four classical tests of general relativity (GR). In [2] the electromagnetic field was included into the theory and the solution for a point charge was obtained. The conservation laws associated to the theory were studied by one of us in [3].…”

Section: Introductionmentioning

confidence: 99%

Metric nonsymmetric theory of gravitation: the analogue of the theorem of Birkhoff

Ragusa¹,

Bosquetti²

2006

Braz. J. Phys.

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“…When the electromagnetic field is present, the vacuum gravitational field equations of the theory become [4] (κ = 8πG)…”

Section: The Vacuum Gravito-electromagnetic Field Equationsmentioning

confidence: 99%

“…Using these two equations we obtain [4] the following values for the non-zero connection components (a = a ,r ),…”

Section: Spherically Symmetric Vacuum Solution: the Static Theoremmentioning

confidence: 99%

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Analogue of the theorem of Birkhoff in a metric nonsymmetric theory of the gravitational-electromagnetic field

Ragusa¹,

Bosquetti²

2007

Braz. J. Phys.

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Optical chirality in gyrotropic media: symmetry approach

et al. 2017

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We discuss optical chirality in different types of gyrotropic media. Our analysis is based on the formalism of nongeometric symmetries of Maxwell's equations in vacuum generalized to material media with given constituent relations. This approach enables us to directly derive conservation laws related to nongeometric symmetries. For isotropic chiral media, we demonstrate that like a free electromagnetic field, both duality and helicity generators belong to the basis set of nongeometric symmetries that guarantees the conservation of optical chirality. In gyrotropic crystals, which exhibit natural optical activity, the situation is quite different from the case of isotropic media. For light propagating along a certain crystallographic direction, there arises two distinct cases: (1) the duality is broken but the helicity is preserved, or (2) only the duality symmetry survives. We show that the existence of one of these symmetries (duality or helicity) is enough to define optical chirality. In addition, we present examples of low-symmetry media, where optical chirality cannot be defined.

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Electromagnetism in a nonsymmetric theory of gravitation

Cited by 4 publications

References 4 publications

Metric nonsymmetric theory of gravitation: the analogue of the theorem of Birkhoff

Metric nonsymmetric theory of gravitation: the analogue of the theorem of Birkhoff

Analogue of the theorem of Birkhoff in a metric nonsymmetric theory of the gravitational-electromagnetic field

Optical chirality in gyrotropic media: symmetry approach

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