The moduli spaces of S-fold CFTs

An S-fold has played an important role in constructing supersymmetric field theories with interesting features. It can be viewed as a type of AdS(4) solutions of Type IIB string theory where the fields in overlapping patches are glued by elements of SL(2, Z). This paper examines three dimensional quiver theories that arise from brane configurations with an inclusion of the S-fold. An important feature of such a quiver is that it contains a link, which is the T (U(N)) theory, between two U(N) groups, along with bifundamental and fundamental hypermultiplets. We systematically study the moduli spaces of those quiver theories, including the cases in which the non-zero Chern-Simons levels are turned on. A number of such moduli spaces turns out to have a very rich structure and tells us about the brane dynamics in the presence of an S-fold.