25 citations · 61 across the 3 of their papers we have counts for
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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…
Heterotic AdS_3/CFT_2 duality with (0,4) spacetime supersymmetry
Stefan Hohenegger, Christoph A. Keller, Ingo Kirsch
We discuss the AdS_3/CFT_2 duality of a heterotic three-charge model with (0,4) target space supersymmetry. The worldsheet theory for heterotic strings on the AdS_3 x S^3/Z_N x T^4…
Symmetries of perturbed conformal field theories
Stefan Fredenhagen, Matthias R. Gaberdiel, Christoph A. Keller
The symmetries of perturbed conformal field theories are analysed. We explain which generators of the chiral algebras of a bulk theory survive a perturbation by an exactly marginal…