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Electromagnetic sources beyond common multipoles

Electromagnetic sources beyond common multipoles
Electromagnetic sources beyond common multipoles

The complete dynamic multipole expansion of electromagnetic sources contains more types of multipole terms than is conventionally perceived. The toroidal multipoles are one of the examples of such contributions that have been widely studied in recent years. Here we inspect more closely the other type of commonly overlooked terms known as the mean-square radii. In particular, we discuss both quantitative and qualitative aspects of the mean-square radii and provide a general geometrical framework for their visualization. We also consider the role of the mean-square radii in expanding the family of nontrivial nonradiating electromagnetic sources.

2469-9926
Nemkov, Nikita A.
6cf62d8c-fc94-4c18-b7de-0c130c06864c
Basharin, Alexey A.
30f27bb6-a094-4785-a5ab-9fb608a31292
Fedotov, Vassili A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Nemkov, Nikita A.
6cf62d8c-fc94-4c18-b7de-0c130c06864c
Basharin, Alexey A.
30f27bb6-a094-4785-a5ab-9fb608a31292
Fedotov, Vassili A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25

Nemkov, Nikita A., Basharin, Alexey A. and Fedotov, Vassili A. (2018) Electromagnetic sources beyond common multipoles. Physical Review A, 98 (2). (doi:10.1103/PhysRevA.98.023858).

Record type: Article

Abstract

The complete dynamic multipole expansion of electromagnetic sources contains more types of multipole terms than is conventionally perceived. The toroidal multipoles are one of the examples of such contributions that have been widely studied in recent years. Here we inspect more closely the other type of commonly overlooked terms known as the mean-square radii. In particular, we discuss both quantitative and qualitative aspects of the mean-square radii and provide a general geometrical framework for their visualization. We also consider the role of the mean-square radii in expanding the family of nontrivial nonradiating electromagnetic sources.

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e-pub ahead of print date: 29 August 2018
Published date: August 2018

Identifiers

Local EPrints ID: 426589
URI: https://eprints.soton.ac.uk/id/eprint/426589
ISSN: 2469-9926
PURE UUID: a56ac03b-a8d4-4819-a993-c325b0df59a4

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Date deposited: 30 Nov 2018 17:30
Last modified: 02 Dec 2019 17:57

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