We introduce quantum optical dipole radiation fields defined in terms of photon creation and
\nannihilation operators. These fields are identified through their spatial dependence, as the
\ncomponents of the total fields that survive infinitely far from the dipole source. We use these
\nradiation fields to perturbatively evaluate the electromagnetic radiated energy-flux of the excited
\ndipole. Our results indicate that the standard interpretation of a bare atom surrounded by a
\nlocalised virtual photon cloud, is difficult to sustain, because the radiated energy-flux surviving
\ninfinitely far from the source contains virtual contributions. It follows that there is a clear
\ndistinction to be made between a radiative photon defined in terms of the radiation fields and a
\nreal photon, whose identification depends on whether or not a given process conserves the free
\nenergy. This free energy is represented by the difference between the total dipole-field Hamiltonian
\nand its interaction component…<\/p>\n","protected":false},"excerpt":{"rendered":"
We introduce quantum optical dipole radiation fields defined in terms of photon creation and
\nannihilation operators. These fields are identified through their spatial dependence, as the
\ncomponents of the total fields that survive infinitely far from …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-186231","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/186231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=186231"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/186231\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=186231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=186231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=186231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}