Arvin Shahbazi-Moghaddam (Stanford University) “Restricted Quantum Focusing”

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Abstract: Quantum Focusing is a powerful conjecture, which plays a key role in the current proofs of manywell-known quantum gravity theorems, including various consistency conditions, and causality constraints in AdS/CFT. I conjecture a (weaker) restricted quantum focusing, which I argue is sufficientto derive all known essential implications of quantum focusing. Subject to a technical assumption,I prove this conjecture, to all orders in perturbation theory, on brane-world semiclassical gravity theories which are holographically dualto Einstein gravity in a higher dimensional anti-de Sitter spacetime. I will speculate on a possible violation of the original quantum focusing condition.