The physical state space of quantum electrodynamics
- First Online:
- Cite this article as:
- Buchholz, D. Commun.Math. Phys. (1982) 85: 49. doi:10.1007/BF02029133
- 123 Views
Starting from the fact that electrically charged particles are massive, we derive a criterion which characterizes the state space of quantum electrodynamics. This criterion clarifies the special role of the electric charge amongst the uncountably many superselection rules in quantum electrodynamics and provides a basis for a general analysis of the infrared problem. Within this framework we establish the existence of asymptotic electromagnetic fields in all charge-sectors, find a general characterization of infra-particles and introduce a notion of asymptotic completeness.