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arXiv · hep-th/0203018

The PP-Wave Limits of Orbifolded AdS_5x S^5

Mohsen Alishahiha·Mohammad M. Sheikh-Jabbari
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Abstract

Using the supergravity solution of $N_1$ D3-branes probing $A_{N_2-1}$ singularities we study the pp-wave limit of $AdS_5\times S^5/Z_{N_2}$. We show that there are two different pp-wave limits. One is the orbifold of the pp-wave limit of $AdS_5\times S^5$. In this case there is no symmetry enhancement. The other case is the same as the pp-wave limit of $AdS_5\times S^5$ and therefore we again see the maximal supersymmetry. We will also identify operators in the four dimensional ${\cal N}=2$ $SU(N_1)^{N_2}$ gauge theory which correspond to stringy excitations in the orbifolded pp-wave geometry. The existence of the maximal pp-wave geometry indicates that there is a subsector of the corresponding ${\cal N}=2$ gauge theories which has enhanced ${\cal N}=4$ supersymmetry. We also study the pp-wave limits of $AdS_{7,4}\times S^{4,7}/Z_{N}$.

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Mohsen Alishahiha, Mohammad M. Sheikh-Jabbari. 2002-04-16. The PP-Wave Limits of Orbifolded AdS_5x S^5. https://doi.org/10.1016/s0370-2693(02)01771-9

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