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Interacting String Multi-verses and Holographic Instabilities of Massive Gravity

E. Kiritsis 1 V. Niarchos 2
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : 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.
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E. Kiritsis, V. Niarchos. Interacting String Multi-verses and Holographic Instabilities of Massive Gravity. Nuclear Physics B, Elsevier, 2009, 812, pp.488-524. ⟨10.1016/j.nuclphysb.2008.12.010⟩. ⟨in2p3-00714909⟩



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