Instantons beyond topological theory. I

Instantons beyond Topological Theory Ii

The present paper is the second part of our project in which we describe quantum field theories with instantons in a novel way by using the " infinite radius limit " (rather than the limit of free field theory) as the starting point. The theory dramatically simplifies in this limit, because the correlation functions of all, not only topological (or BPS), observables may be computed explicitly i...

Topological field theory and computing with instantons

Chern-Simons topological field theories (TFTs) [1, 2] are the only TFTs that have already found application in the description of some exotic strongly-correlated electron systems and the corresponding concept of topological quantum computing [1, 3]. Here, we show that TFTs of another type, specifically the gauge-field-less Witten-type TFTs known as topological sigma models [4], describe the rec...

Instantons: topological aspects

Topological Yang Mills and Instantons

By defining an extended BRST operator that includes the chiral part of N=2 global supersymmetry, it is shown that the full N=2 offshell Super Yang Mills Action can be represented as an exact BRST term. The action written in this form suggests that the fields of the Topological Yang Mills theory can be defined in terms of composite fields of supersymmetry ghosts and N=2 fields in a natural way. ...

Small Instantons, Del Pezzo Surfaces and Type I theory

Samll instantons of exceptional groups arise geometrically by a collapsing Del Pezzo surface in a CY. We use this to explain the physics of a 4-brane probe in Type I ′ compactification