Interacting string multi-verses and holographic instabilities of massive gravity

DOI10.1016/J.NUCLPHYSB.2008.12.010zbMATH Open1194.83116arXiv0808.3410OpenAlexW2075872729MaRDI QIDQ993144

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Publication date: 10 September 2010

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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.

Full work available at URL: https://arxiv.org/abs/0808.3410

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