Authors: S. Albeverio, G. Gallavotti, and R. Hoegh-Krohn

Title: Some Results for the Exponential Interaction in Two or More Dimensions
Communication in Mathematical Physics, 70, 187--192, 1979

Abstract: We show that for the regularized exponential interaction $\lambda :e^{i\alpha\phi:$ in $d$ space-time dimensions the Schwinger functions converge to the Schwinger functions for the free field if $d>2$ for all $\alpha$ or if $d = 2$ for all $\alpha$ such that $\alpha>\alpha_0$.

Key words:  Field theory, Quantum fields, Triviality, Exponential interaction