Abstract: In this talk we discuss some new holographic perspectives for 4d N=2 superconformal theories. We consider a special family of theories, arising as orbifolds of N=4 SYM under the action of a Z_k group, realizing a circular quiver theory preserving N=2 superconformal invariance.
Following the Gaberdiel-Gopakumar derivation, we construct 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 at large N, realizing the first step for the AdS/CFT correspondence in N=2 framework in the full stringy regime.
Finally, we discuss possible generalizations of this approach mentioning N=2 SQCD as the main example.
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https://uni-hamburg.zoom.us/j/69290740393?pwd=TzBiWWM4UVl1MUd4VlJEalQ1Slk2UT09
Meeting ID: 692 9074 0393
Passcode: 58954518