Workshop
The phase of QED in external fields
- Dirk Deckert (Ludwig Maximillian University of Munich, Munich, Germany)
Abstract
I will report on joint progress of my collaborators Franz Merkl and Markus Nöth and myself to construct the phase of the scattering operator of QED in external fields. This phase plays an important role in the computation of physical measurands such as the charge current. However, as it is well-known, it remains unidentified by the canonical lift of the corresponding one-particle scattering matrix and calls for a geometric construction which I will present.
