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 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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Author:Dorin Cezar Ionescu, Walter GreinerGND, Berndt MüllerORCiDGND, Gerhard SoffGND
Parent Title (German):Physical review A
Document Type:Article
Date of Publication (online):2006/07/11
Year of first Publication:1993
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2006/07/11
Page Number:14
First Page:854
Last Page:867
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
PACS-Classification:10.00.00 THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS (for experimental methods and instrumentation for elementary-particle physics, see section 29) / 12.00.00 Specific theories and interaction models; particle systematics / 12.20.-m Quantum electrodynamics / 12.20.Ds Specific calculations
Licence (German):License LogoDeutsches Urheberrecht