Field theoretic description of electromagnetic boundaries

Barone, F. A.

doi:10.1140/epjc/s10052-014-3113-y

Cited by 17 publications

(17 citation statements)

References 25 publications

(40 reference statements)

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“…An interesting extension of this work would be the investigation of the interaction force between two parallel plates (Casimir effect), using the method employed in refs. [56,67], for the model considered in the present work [68].…”

Section: Discussionmentioning

confidence: 99%

New Effects in the Vicinity of a Perfectly Conducting Plate in a Non-minimal Lorentz Violation Scenario

Borges

Barone

2020

Braz J Phys

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In this paper we consider some physical phenomena in the vicinity of a conducting plate in a non-minimal Lorentz-violating scenario in 3+1 dimensions. We consider a model where the dynamics of the abelian gauge field is given by the standard Maxwell Lagrangian added by a Lorentz symmetry breaking term with the presence of higher order derivatives in the gauge field. The Lorentz symmetry breaking is due to the presence of a single background vector d λ and we perform the calculations perturbatively up to first order in d λ. We obtain the propagator for the gauge field in the presence of a mirror and the interaction force between the mirror and a point-like electric charge, as well as the interaction force between the mirror and an electric dipole. We show that, on the contrary to what happens in a minimal Lorentz-violating scenario with one single background field (L.H.C. Borges, F.A. Barone, Eur. Phys. J. C 693, 77, 2017), the image method is not valid in the model that we consider in this paper. As a consequence, the symmetry of spatial reflection on the mirror is broken. We also investigate the emergence of a torque in a system composed by a mirror and a point-like electric charge, placed at a fixed distance apart each other. The results obtained in this work have no counterpart in the Maxwell electrodynamics and were not verified in any Lorentz-violating scenario previously.

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Section: Discussionmentioning

confidence: 99%

New Effects in the Vicinity of a Perfectly Conducting Plate in a Non-minimal Lorentz Violation Scenario

Borges

Barone

2020

Braz J Phys

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“…For a detailed discussion of the current transport mechanisms in this type of materials, the reader is referred to [13,14], where by the help of low-frequency noise spectroscopy, measured in a wide range of temperatures between 5 K and 300 K, the dominant role of the interconnection resistance between single nanotubes in the percolation network is emphasized. While from cryogenic temperatures up to about 70°C a decrease of the sample resistance with a temperature increase has been observed [13,15], for temperatures approaching the melting temperature a strong increase of the sample resistance with increasing temperature has been found. This positive temperature coefficient (PTC) behavior due to the Joule heating of the samples can be for example exploited in current limiting devices [16].…”

Section: Electrical Characteristicsmentioning

confidence: 99%

HDPE/MWCNT composite as microwave absorber

Giacomo

Neitzert

2014

AIP Conference Proceedings

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A HDPE/CNT composite has been fabricated based on a commercial polyethylene loaded with a high concentration of CVD grown multiwalled carbon nanotubes with a high aspect ratio. Exploiting the resulting high\ud conductivity of this composite material, we tested the possibility to use it as absorber of electromagnetic waves at microwave frequencies up to 25 GHz. For this purpose the device under test was placed as substrate of a microstrip transmission line. Measurements of the scattering parameters, done with a vectorial network analyzer, have been used in order to obtain the power absorption at different frequencies. Special attention was paid to the optimization of the microstrip geometry. A comparison of the microwave power absorption spectrum with those of commercial\ud cavity absorbers showed encouraging results, regarding the microwave absorption capability of the HDPE/CNT composite material

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“…This subject has been of great interest for both experimental and theoretical reasons, once typical experimental setups are composed by material boundaries whose influence on the dynamics of fields cannot be disregarded. In this scenario, we can mention, for instance, the interactions between semi-transparent mirrors a e-mail: helderluiz10@gmail.com b e-mail: luizhenriqueunifei@yahoo.com.br c e-mail: frederico.barone@gmail.com d e-mail: fbarone@unifei.edu.br (corresponding author) and point-like particles [1][2][3], investigations which concern the interaction between an atom and a δ-like mirror [4,5], the Casimir energy due to the presence of two δ-like mirrors [6][7][8][9][10][11][12][13][14][15][16][17], and so on.…”

Section: Introductionmentioning

confidence: 99%

Magnetoelectric boundary simulated by a Chern–Simons-like model

Oliveira

Borges

Barone³

2021

Eur. Phys. J. C

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In this work we study some physical phenomena that emerge in the vicinity of a magnetoelectric boundary. For simplicity, we restrict to the case of a planar boundary described by a coupling between the gauge field with a planar external Chern–Simons-like potential. The results are obtained exactly. We compute the correction undergone by the photon propagator due to the presence of the Chern–Simons coupling and we investigate the interaction between a stationary point-like charge and the magnetoelectric boundary. In the limit of a perfect mirror, where the coupling constant between the field and the potential diverges, we recover the image method. For a non perfect mirror, we show that we have an attenuated image charge and, in addition, an image magnetic monopole whose field strength does not exhibit the presence of the undesirable and artificial divergences introduced by Dirac strings. We also study the interaction between the plate and a quantum particle with spin. In this case we have a kind of charge-magnetic dipole interaction due to the magnetoelectric properties of the plate.

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Field theoretic description of electromagnetic boundaries

Cited by 17 publications

References 25 publications

New Effects in the Vicinity of a Perfectly Conducting Plate in a Non-minimal Lorentz Violation Scenario

New Effects in the Vicinity of a Perfectly Conducting Plate in a Non-minimal Lorentz Violation Scenario

HDPE/MWCNT composite as microwave absorber

Magnetoelectric boundary simulated by a Chern–Simons-like model

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