String junctions suspended between giants

Abstract

We construct $(p,q)$ string junction solutions suspended between both sphere and AdS giant gravitons in $Ad{S}_5\times S^5$. Our results extend easily to more general half BPS geometries of LLM type. These carry angular momentum in the directions of the worldvolume of the giant gravitons. We argue that these are charged under a central extension of the supersymmetry algebra similar to the one that has appeared in the works of Beisert for the $\mathcal{N}=4$ spin chain. We also argue that they are BPS with respect to this central extension. We show that apart from some kinematical details, the junctions end up solving the same minimization problem that appears in the Coulomb branch of $\mathcal{N}=4$ SYM. Their mass and shape is independent of the angular momentum $Q$ that the junction carries.

arXiv comment12 pages

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