Abstract Enhancement of global symmetry and supersymmetry in the infrared is one of carhartt flasche the most intriguing phenomena in quantum field theory.We investigate such phenomena in a large class of three dimensional superconformal field theories, known as the S-fold SCFTs.Supersymmetric indices are computed for a number of theories containing small rank gauge groups.
It is found that indices of several models exhibit enhancement of supersymmetry at the superconformal fixed point in the infrared.Dualities between S-fold theories that have different quiver descriptions are also analysed.We explore a new class of theories with a discrete global symmetry, whose gauge symmetry in the quiver has a different global structure from those grace m801 that have been studied earlier.