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 |
|---|---|
| URN: | urn:nbn:de:hebis:30-29915 |
| Parent Title (German): | Physical review A |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2006/07/11 |
| Year of first Publication: | 1993 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2006/07/11 |
| Volume: | 47 |
| Issue: | 2 |
| Page Number: | 14 |
| First Page: | 854 |
| Last Page: | 867 |
| HeBIS-PPN: | 193818922 |
| 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): |  Deutsches Urheberrecht |
