Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-02-22
JHEP 0203 (2002) 048
Physics
High Energy Physics
High Energy Physics - Theory
15 pages, LaTeX; v2: added more detail to a derivation, and a preprint number; v3: minor corrections, some remarks and referen
Scientific paper
10.1088/1126-6708/2002/03/048
We observe that the pp wave limit of $AdS_5\times M^5$ compactifications of type IIB string theory is universal, and maximally supersymmetric, as long as $M^5$ is smooth and preserves some supersymmetry. We investigate a specific case, $M^5=T^{1,1}$. The dual ${\cal N}=1$ SCFT, describing D3-branes at a conifold singularity, has operators that we identify with the oscillators of the light-cone string in the universal pp-wave background. The correspondence is remarkable in that it relies on the exact spectrum of anomalous dimensions in this CFT, along with the existence of certain exceptional series of operators whose dimensions are protected only in the limit of large `t Hooft coupling. We also briefly examine the singular case $M^5=S^5/Z_2$, for which the pp wave background becomes a $Z_2$ orbifold of the maximally supersymmetric background by reflection of 4 transverse coordinates. We find operators in the corresponding ${\cal N}=2$ SCFT with the right properties to describe both the untwisted and the twisted sectors of the closed string.
Itzhaki Nissan
Klebanov Igor R.
Mukhi Sunil
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