paper

Comments on twisted indices in 3d supersymmetric gauge theories

arXiv:1605.06531 · doi:10.1007/JHEP08(2016)059

Abstract

We study three-dimensional supersymmetric gauge theories on with a topological twist along , a genus- Riemann surface. The twisted supersymmetric index at genus and the correlation functions of half-BPS loop operators on can be computed exactly by supersymmetric localization. For , this gives a simple UV computation of the 3d Witten index. Twisted indices provide us with a clean derivation of the quantum algebra of supersymmetric Wilson loops, for any Yang-Mills-Chern-Simons-matter theory, in terms of the associated Bethe equations for the theory on . This also provides a powerful and simple tool to study 3d Seiberg dualities. Finally, we study A- and B-twisted indices for supersymmetric gauge theories, which turns out to be very useful for quantitative studies of three-dimensional mirror symmetry. We also briefly comment on a relation between the twisted indices and the Hilbert series of moduli spaces.

66 pages plus appendix; v2: corrected typos and added references

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