Notes on instantons in topological field theory and beyond

Details Notes on instantons in topological field theory and beyond Notes on instantons in topological field theory and beyond

2007-02-19

arxiv.org/abs/hep-th/0702137v1

Nucl.Phys.Proc.Suppl.171:215-230,2007

Physics

High Energy Physics

High Energy Physics - Theory

20 pages

Scientific paper

10.1016/j.nuclphysbps.2007.06.01

This is a brief summary of our studies of quantum field theories in a special limit in which the instantons are present, the anti-instantons are absent, and the perturbative corrections are reduced to one-loop. We analyze the corresponding models as full-fledged quantum field theories, beyond their topological sector. We show that the correlation functions of all, not only topological (or BPS), observables may be studied explicitly in these models, and the spectrum may be computed exactly. An interesting feature is that the Hamiltonian is not always diagonalizable, but may have Jordan blocks, which leads to the appearance of logarithms in the correlation functions. We also find that in the models defined on Kahler manifolds the space of states exhibits holomorphic factorization. In particular, in dimensions two and four our theories are logarithmic conformal field theories.

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