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Nuclear Physics B 812 (2009) 488-524
Interacting String Multi-verses and Holographic Instabilities of Massive Gravity
E. Kiritsis1, 2, 3, V. Niarchos2
(2009)

Products of large-N conformal field theories coupled by multi-trace interactions in diverse dimensions are used to define quantum multi-gravity (multi-string theory) on a union of (asymptotically) AdS spaces. One-loop effects generate a small O(1/N) mass for some of the gravitons. The boundary gauge theory and the AdS/CFT correspondence are used as guiding principles to study and draw conclusions on some of the well known problems of massive gravity - classical instabilities and strong coupling effects. We find examples of stable multi-graviton theories where the usual strong coupling effects of the scalar mode of the graviton are suppressed. Our examples require a fine tuning of the boundary conditions in AdS. Without it, the spacetime background backreacts in order to erase the effects of the graviton mass.
1 :  CPHT - Centre de Physique Théorique [Palaiseau]
2 :  Physics Department
3 :  APC - UMR 7164 - AstroParticule et Cosmologie
APC - THEORIE
Physique/Physique des Hautes Energies - Théorie
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/0808.3410