Topic
Electromagnetic field
About: Electromagnetic field is a research topic. Over the lifetime, 39162 publications have been published within this topic receiving 611857 citations. The topic is also known as: EM field & EMF.
Papers published on a yearly basis
Papers
More filters
Book•
01 Jan 1986
TL;DR: A first year graduate text on electromagnetic field theory emphasizing mathematical approaches, problem solving and physical interpretation is presented in this article, where guidance propagation, radiation, and scattering of electromagnetic waves are discussed.
Abstract: A first year graduate text on electromagnetic field theory emphasizing mathematical approaches, problem solving and physical interpretation. Examples deal with guidance propagation, radiation, and scattering of electromagnetic waves; metallic and dielectric wave guides, resonators, antennas and radiating structures, Cerenkov radiation, moving media, plasmas, crystals, integrated optics, lasers and fibers, remote sensing, geophysical probing, dipole antennas and stratified media.
2,257 citations
TL;DR: In this article, it was shown that the most immediate method of taking into account the effect of the electromagnetic field, proposed by Dirac (1936), leads to inconsistent equations as soon as the spin is greater than 1.
Abstract: The investigations of Dirac (1936) on relativistic wave equations for particles with arbitrary spin have recently been followed up by one of us (Fierz, 1939, referred to as (A)) It was there found possible to set up a scheme of second quantization in the absence of an external field, and to derive expressions for the current vector and the energy-momentum tensor. These considerations will be extended in the present paper to the case when there is an external electromagnetic field, but we shall in the first instance disregard the second quantization and confine ourselves to a c -number theory. The difficulty of this problem is illustrated by the fact that the most immediate method of taking into account the effect of the electromagnetic field, proposed by Dirac (1936), leads to inconsistent equations as soon as the spin is greater than 1.
2,070 citations
TL;DR: The relation of matter and the electromagnetic field can be interpreted from two opposite standpoints as discussed by the authors : the unitarian viewpoint assumes only one physical entity (e.g., a single unitary entity) and the second viewpoint assumes that all particles of matter are considered as singularities of the field and mass is a derived notion expressed by field energy (electromagnetic mass).
Abstract: The relation of matter and the electromagnetic field can be interpreted from two opposite standpoints:— The first which may be called the unitarian standpoint assumes only one physical entity, the electromagnetic field The particles of matter are considered as singularities of the field and mass is a derived notion to be expressed by field energy (electromagnetic mass)
1,861 citations
TL;DR: Hanbury-Brown and Twiss as mentioned in this paper showed that photon detections in the two daughter beams were correlated: the photons were bunching together, which corresponded to a correlation in the intensity of light in two beams, which could be used to infer the angular size of distant stars.
Abstract: Classical interferometry works by detecting correlations in the phases of two waves. In Nature in 1956, R. Hanbury-Brown and R. Q. Twiss demonstrated another technique that probes quantum-mechanical correlations in the electromagnetic field. Splitting an incoherent light beam, they found that photon detections in the two daughter beams were correlated: the photons were bunching together. This corresponds to a correlation in the intensity of light in the two beams, which Hanbury-Brown and Twiss suggested could be used to infer the angular size of distant stars. Physicists now rely on the effect to probe the quantum character of complex light sources. [Obituary of Robert Hanbury Brown: Nature 416, 34 (2002)]
1,829 citations
TL;DR: In this article, the chiral magnetic effect of topological charge changing transitions in the quark-gluon plasma has been studied and an electromagnetic current is generated along the magnetic field.
Abstract: Topological charge changing transitions can induce chirality in the quark-gluon plasma by the axial anomaly. We study the equilibrium response of the quark-gluon plasma in such a situation to an external magnetic field. To mimic the effect of the topological charge changing transitions we will introduce a chiral chemical potential. We will show that an electromagnetic current is generated along the magnetic field. This is the chiral magnetic effect. We compute the magnitude of this current as a function of magnetic field, chirality, temperature, and baryon chemical potential.
1,821 citations