BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Ayan Mukhopadhyay (Indian Institute Of Technology Madras) DTSTART:20200609T140000Z DTEND:20200609T150000Z DTSTAMP:20260423T041510Z UID:HoloTube/9 DESCRIPTION:Title: SL(2\,R) lattices and networks as information mirrors and decoders\nb y Ayan Mukhopadhyay (Indian Institute Of Technology Madras) as part of Hol oTube: Applied holography webinars\n\n\nAbstract\nQuantum black holes past their Page times are unique objects in terms of how they process quantum information. Thinking of such black holes as quantum circuits\, it has bee n argued that while infalling information after Page time comes out quickl y at the order of Hayden-Preskill time\, processing the information about the black hole interior will require timescales that are much larger than the evaporation time of the black hole in order to avoid information parad oxes. Thus quantum black holes acts as information mirrors that reveals th e bits that fell in just after Page time first and its own formation later . Motivated by the fragmented horizon picture\, we construct a simple mode l that can capture the essence of quantum black holes in terms of its info rmation processing. Our model is a lattice of nearly two-dimensional anti- de Sitter spaces interacting with mobile quantum hair carrying gravitation al charges. We will show that this model can realize the Hayden-Preskill p rotocol while not encountering information paradoxes due to inherent pseud orandomness and scrambling. Furthermore\, we will discuss well motivated g eneralizations of this model that are analogous to tensor networks. We wil l argue these can provide computable “fragmented holographic” framewo rks for general semi-local non-Fermi liquids and other strongly correlated systems.\n LOCATION:https://researchseminars.org/talk/HoloTube/9/ END:VEVENT END:VCALENDAR