Collective excitations of the QED vacuum

Using relativistic Green’s-function techniques we examined single-electron excitations from the occupied Dirac sea in the presence of strong external fields. The energies of these excited states are determined taking int
Using relativistic Green’s-function techniques we examined single-electron excitations from the occupied Dirac sea in the presence of strong external fields. The energies of these excited states are determined taking into account the electron-electron interaction. We also evaluate relativistic transition strengths incorporating retardation, which represents a direct measure of correlation effects. The shifts in excitation energies are computed to be lower than 0.5%, while the correlated transition strengths never deviate by more than 10% from their bare values. A major conclusion is that we found no evidence for collectivity in the electron-positron field around heavy and superheavy nuclei.
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Metadaten
Author:D. C. Ionescu, Walter Greiner, Berndt Müller, Gerhard Soff
URN:urn:nbn:de:hebis:30-29915
Document Type:Article
Language:English
Date of Publication (online):2006/07/11
Year of first Publication:1993
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2006/07/11
HeBIS PPN:193818922
Institutes:Physik
Dewey Decimal Classification:530 Physik
PACS-Classification:12.20.Ds Specific calculations
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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