AdS5 x S5 Untwisted
Abstract
Noting that T-duality untwists S5 to CP2 x S1, we construct the duality chain: n=4 super Yang-Mills --> Type IIB superstring on AdS5 x S5 --> Type IIA superstring on AdS5 x CP2 x S1 --> M-theory on AdS5 x CP2 x T2. This provides another example of supersymmetry without supersymmetry: on AdS5 x CP2 x S1, Type IIA supergravity has SU(3) x U(1) x U(1) x U(1) and N=0 supersymmetry but Type IIA string theory has SO(6) and N=8. The missing superpartners are provided by stringy winding modes. We also discuss IIB compactifications to AdS5 with N=4, N=2 and N=0.
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