An anthology of non-local QFT and QFT on noncommutative spacetime

Abstract

Ever since the appearance of renormalization theory there have been several differently motivated attempts at non-localized (in the sense of not generated by point-like fields) relativistic particle theories, the most recent one being at QFT on non-commutative Minkowski spacetime. The often conceptually uncritical and historically forgetful contemporary approach to these problems calls for a critical review the light of previous results on this subject.

Comments: 33 pages tci-latex, improvements of formulations, shortening of sentences, addition of some references