The problem of gauge invariance in Dirac field theory

Details The problem of gauge invariance in Dirac field theory The problem of gauge invariance in Dirac field theory

2003-06-10

arxiv.org/abs/quant-ph/0306071v1

Physics

Quantum Physics

30 pages - Comments welcome

Scientific paper

Quantum field theory is assumed to be gauge invariant. However it is well known that when certain quantities are calculated using perturbation theory the results are not gauge invariant. The non-gauge invariant terms have to be removed in order to obtain a physically correct result. In this paper we will examine this problem and determine why a theory that is supposed to be gauge invariant produces non-gauge invariant results.

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