dc.contributor.author | Milton, Kimball A. | |
dc.contributor.author | Brevik, Iver Håkon | |
dc.date.accessioned | 2018-10-05T12:55:18Z | |
dc.date.available | 2018-10-05T12:55:18Z | |
dc.date.created | 2018-03-16T10:09:05Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Symmetry. 2018, 10 (3), . | nb_NO |
dc.identifier.issn | 2073-8994 | |
dc.identifier.uri | http://hdl.handle.net/11250/2566700 | |
dc.description.abstract | It is known that the Casimir self-energy of a homogeneous dielectric ball is divergent, although a finite self-energy can be extracted through second order in the deviation of the permittivity from the vacuum value. The exception occurs when the speed of light inside the spherical boundary is the same as that outside, so the self-energy of a perfectly conducting spherical shell is finite, as is the energy of a dielectric-diamagnetic sphere with εμ=1 , a so-called isorefractive or diaphanous ball. Here we re-examine that example and attempt to extend it to an electromagnetic δ -function sphere, where the electric and magnetic couplings are equal and opposite. Unfortunately, although the energy expression is superficially ultraviolet finite, additional divergences appear that render it difficult to extract a meaningful result in general, but some limited results are presented. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | MDPI | nb_NO |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Casimir energies for isorefractive or diaphanous balls | nb_NO |
dc.title.alternative | Casimir energies for isorefractive or diaphanous balls | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | 10 | nb_NO |
dc.source.volume | 10 | nb_NO |
dc.source.journal | Symmetry | nb_NO |
dc.source.issue | 3 | nb_NO |
dc.identifier.doi | 10.3390/sym10030068 | |
dc.identifier.cristin | 1573389 | |
dc.relation.project | Norges forskningsråd: 250346 | nb_NO |
dc.description.localcode | (C) 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). | nb_NO |
cristin.unitcode | 194,64,25,0 | |
cristin.unitname | Institutt for energi- og prosessteknikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |