Determination of the propagator in QED3 by spectral function Original Research Article

To study the infrared behaviour of the propagator, a method of exponentiation of the lowest order spectral function has been known. We show that this method is helpful in super renormalizable theory as QED3 with dimension-full coupling constant. In the 1/N approximation anomalous dimension is independent of N, which plays an important role for confinement and pair condensation.