BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Hong Liu (MIT) DTSTART:20211213T160000Z DTEND:20211213T170000Z DTSTAMP:20260423T005704Z UID:FHD3/10 DESCRIPTION:Title: Ca usal connectability between quantum systems and the black hole interior in holographic duality\nby Hong Liu (MIT) as part of Frontiers of Hologr aphic Duality-3\n\n\nAbstract\nIn holographic duality an eternal AdS black hole is described by two copies of the boundary CFT in the thermal field double state. This identification still has many puzzles\, including the b oundary descriptions of the event horizons\, the interiors of the black ho le\, and the singularities. Compounding these mysteries is the fact that\ , while there is no interaction between the CFTs\, observers from them can fall into the black hole and interact. We will address these issues in th is talk. In particular\, we (i) present a boundary formulation of infallin g observers\; (ii) show that in any holographic systems\, a sharp event ho rizon can only emerge in the infinite N limit\; (iii) give an explicit con struction in the boundary theory of an evolution operator for a family of bulk in-falling observers\, making manifest the boundary emergence of the black hole horizons\, the interiors\, and the associated causal structure. \n\nA by-product is a concept called causal connectability\, which is a c riterion for any two quantum systems (which do not necessarily have a know n gravity dual) to have an emergent sharp horizon structure.\n LOCATION:https://researchseminars.org/talk/FHD3/10/ END:VEVENT END:VCALENDAR