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dc.contributor.authorSkagerstam, Bo-Sture
dc.contributor.authorEriksson, Karl-Erik
dc.contributor.authorRekdal, Per Kristian
dc.date.accessioned2020-02-06T07:19:37Z
dc.date.available2020-02-06T07:19:37Z
dc.date.created2019-09-13T10:16:05Z
dc.date.issued2019
dc.identifier.citationJournal of Physics Communications. 2019, 3 (8), ?-15.nb_NO
dc.identifier.issn2399-6528
dc.identifier.urihttp://hdl.handle.net/11250/2639911
dc.description.abstractIn an exact quantum-mechanical framework we show that space-time expectation values of the second-quantized electromagnetic fields in the Coulomb gauge in the presence of a classical conserved source automatically lead to causal and properly retarded -independent electromagnetic field strengths. The classical -independent and gauge invariant Maxwell's equations naturally emerge in terms of quantum-mechanical expectation values and are therefore also consistent with the classical special theory of relativity. The fundamental difference between interference phenomena due to the linear nature of the classical Maxwell theory as considered in, e.g., classical optics, and interference effects of quantum states is clarified. In addition to these issues, the framework outlined also provides for a simple approach to invariance under time-reversal, some spontaneous photon emission and/or absorption processes as well as an approach to Vavilov-Čherenkov radiation. The inherent and necessary quantum uncertainty, limiting a precise space-time knowledge of expectation values of the quantum fields considered, is, finally, recalled.nb_NO
dc.language.isoengnb_NO
dc.publisherInstitute of Physics, IOP Sciencenb_NO
dc.relation.urihttps://doi.org/10.1088/2399-6528/ab3c1c
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleCausality in quantum field theory with classical sourcesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.volume3nb_NO
dc.source.journalJournal of Physics Communicationsnb_NO
dc.source.issue8nb_NO
dc.identifier.doi10.1088/2399-6528/ab3c1c
dc.identifier.cristin1724380
dc.description.localcodeOriginal content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.nb_NO
cristin.unitcode194,66,20,0
cristin.unitnameInstitutt for fysikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal