75 citations · 148 across the 4 of their papers we have counts for
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hep-th2008★ 25 cited
Extremal N=(2,2) 2D Conformal Field Theories and Constraints of Modularity
Matthias R. Gaberdiel, Sergei Gukov, Christoph A. Keller +2
We explore the constraints on the spectrum of primary fields implied by modularity of the elliptic genus of N=(2,2) 2D CFT's. We show that such constraints have nontrivial implicat…
hep-th2008★ 24 cited
Rigid Surface Operators
Sergei Gukov, Edward Witten
Surface operators in gauge theory are analogous to Wilson and 't Hooft line operators except that they are supported on a two-dimensional surface rather than a one-dimensional curv…