Physical Fields in QED
The connection between the Gupta-Bleuler formulation and the Coulomb gauge formulation of QED is discussed. It is argued that the two formulations are not connected by a gauge transformation. Nor can the state space of the Coulomb gauge be identified with a subspace of the Gupta-Bleuler space. Instead a more indirect connection between the two formulations via a detour through the Wightman reconstruction theorem is proposed.
KeywordsPerturbation Theory Gauge Transformation Physical Field Local Observable Coulomb Gauge
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- 11.K. Symanzik: Lectures on Lagrangian Quantum Field Theory. Internal report DESY T71-1, 1971.Google Scholar