Non-Local Effects of Multi-Trace Deformations in the AdS/CFT Correspondence
Abstract
The AdS/CFT correspondence relates deformations of the CFT by "multi-trace operators" to "non-local string theories". The deformed theories seem to have non-local interactions in the compact directions of space-time; in the gravity approximation the deformed theories involve modified boundary conditions on the fields which are explicitly non-local in the compact directions. In this note we exhibit a particular non-local property of the resulting space-time theory. We show that in the usual backgrounds appearing in the AdS/CFT correspondence, the commutator of two bulk scalar fields at points with a large enough distance between them in the compact directions and a small enough time-like distance between them in AdS vanishes, but this is not always true in the deformed theories. We discuss how this is consistent with causality.
Cite
@article{arxiv.hep-th/0504177,
title = {Non-Local Effects of Multi-Trace Deformations in the AdS/CFT Correspondence},
author = {Ofer Aharony and Micha Berkooz and Boaz Katz},
journal= {arXiv preprint arXiv:hep-th/0504177},
year = {2009}
}
Comments
24 pages, 6 figures, 2 appendices. v2: added references