The Causal Phase in $QED_{3}$

Details The Causal Phase in $QED_{3}$ The Causal Phase in $QED_{3}$

1995-08-30

arxiv.org/abs/hep-th/9508161v1

Int.J.Theor.Phys.36:1565-1574,1997

Physics

High Energy Physics

High Energy Physics - Theory

LaTex, 11 pages, no figures

Scientific paper

10.1007/BF02435756

The operator ${\bf S}$ in Fock space which describes the scattering and particle production processes in an external time-dependent electromagnetic potential $A$ can be constructed from the one-particle S-matrix up to a physical phase $\lambda [A]$. In this work we determine this phase for $QED$ in (2+1) dimensions, by means of causality, and show that no ultraviolet divergences arise, in contrast to the usual formalism of $QED$.

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