Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-01-15
Fortsch.Phys.57:646-653,2009
Physics
High Energy Physics
High Energy Physics - Theory
8 pages, 3 figures, prepared for the proceedings of the 2008 RTN meeting "Constituents, Fundamental Forces and Symmetries of t
Scientific paper
10.1002/prop.200900020
Infrared modifications of gravity have been proposed over the years as potentially useful phenomenological models. Massive (multi)-gravity is an interesting class of such theories. The true nature and the ultimate consistency of many of these models remains, however, unclear as one is frequently faced with important problems, e.g. classical instabilities and strong coupling problems which are hard to resolve without a known UV completion of the theory. In this note, we review a recent attempt to study some of these well known problems with the use of the AdS/CFT correspondence. In this context, products of large-N conformal field theories coupled by multi-trace interactions in diverse dimensions are used to define quantum multi-gravity (multi-string/M theory) on a union of (asymptotically) AdS spaces. One-loop effects generate a small O(1/N) mass for the gravitons and provide non-trivial examples of massive multi-graviton theories.
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