Photon as a Composite Particle in Quantum Electrodynamics
Abstract
It has been claimed that quantum electrodynamics can be written in a form in which the photon appears as a bound state (of the electron and positron). We examine this notion in the light of recent attempts to describe bound states in field theory by the vanishing of wavefunction renormalization constants. Our conclusion is that even if the renormalization constant Z_{3}=0 to all orders of perturbation theory, the photon cannot be described as a bound state, because other necessary conditions are not satisfied. The argument is given (implicitly) in terms of Green's functions rather than fields.
 Publication:

Physical Review
 Pub Date:
 May 1967
 DOI:
 10.1103/PhysRev.157.1444
 Bibcode:
 1967PhRv..157.1444B