"Double-trace" Deformations, Boundary Conditions and Spacetime Singularities
arXiv:hep-th/0112264 · doi:10.1088/1126-6708/2002/05/034
Abstract
Double-trace deformations of the AdS/CFT duality result in a new perturbation expansion for string theory, based on a non-local worldsheet. We discuss some aspects of the deformation in the low energy gravity approximation, where it appears as a change in the boundary condition of fields. We relate unique features of the boundary of AdS to the worldsheet becoming non-local, and conjecture that non-local worldsheet actions may be generic in other classes of backgrounds.
21 pages, 2 figures, harvmac. v2: minor changes, references added, version sent to JHEP. v3 minor corrections