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- W3100834032 abstract "I compare two holographic mechanisms giving to the graviton a parametrically-small supersymmetric mass $m_g$ in Anti-de Sitter spacetime. In the context of bi-metric gravity these mechanisms couple `weakly' two initially decoupled superconformal theories by: (i) turning on a double-trace deformation, or (ii) gauging a common global symmetry. Superconformal invariance restricts the number of Poincar'e supercharges to $N_Qleq 4$ for mechanism (i) and to $N_Qleq 8$ for mechanism (ii), and the AdS dimension to $Dleq 5$. The putative effective supergravities are expected to break down in the $m_gto 0$ limit at an intermediate scale between $ m_g$ and $m_{rm Planck}$. In a recently-proposed microscopic embedding of mechanism (ii) in string theory I show that $m_g=0$ is at infinite distance in moduli space, and I relate the breakdown of the effective theory to the condensation of unprotected spin-2 excitations in the string-theoretic description of the `holographic bridge'. The phenomenon is invisible in the weakly-coupled CFT side. I conjecture that similar phenomena should be at work in all cases." @default.
- W3100834032 created "2020-11-23" @default.
- W3100834032 creator A5079304284 @default.
- W3100834032 date "2019-06-01" @default.
- W3100834032 modified "2023-09-30" @default.
- W3100834032 title "Massive AdS supergravitons and holography" @default.
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- W3100834032 doi "https://doi.org/10.1007/jhep06(2019)073" @default.
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