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Gaberdiel, Matthias R.; Gopakumar, Rajesh; Nairz, Beat
The journal of high energy physics, 6/6, Letnik: 2024, Številka: 6Journal Article
A bstract The symmetric orbifold of 𝕋 4 is exactly dual to string theory on AdS 3 × S 3 × 𝕋 4 with minimal ( k = 1) NS-NS flux. In this paper we study the perturbation of the symmetric orbifold that is dual to switching on R-R flux, and hence to deforming the theory away from the tensionless point. More specifically, we determine systematically the action of a centrally extended supersymmetry algebra on the CFT states, and deduce from it the anomalous conformal dimensions. In the w -twisted sector with large w the structure is similar to what was found for N = 4 SYM: the basic excitations are multi-magnons whose individual dispersion relation is fixed by symmetry, and the comparison with the BMN answer suggests that the result is true to all orders in perturbation theory. Finally we show that the multi-magnon states interact via an integrable S -matrix and possess a natural family of bound states.
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