Theoretical Physics Seminar: Francesco Galvagno

Title: Holographic perspectives for N=2 SCFTs in the tensionless limit

Abstract: In this talk we discuss the holographic properties of some 4d planar gauge theories in the zero coupling limit, corresponding to the tensionless limit from the string dual perspective. In particular, we consider a special family of theories, arising as orbifolds of N=4 SYM, which realize a circular quiver theory preserving N=2 superconformal invariance. Following the Gaberdiel-Gopakumar derivation, we propose a free field worldsheet theory in the tensionless string limit which is dual to the orbifold gauge theory at the free theory point. In particular, after imposing some specific gauge constraints on the worldsheet degrees of freedom, the spectrally flowed worldsheet spectrum is in one-to-one correspondence with the single trace operators of the 4d theory. Finally, we discuss possible generalizations of this approach, mentioning N=2 SCQCD as the main example.