BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Tarek Anous (University of Amsterdam) DTSTART:20201009T174500Z DTEND:20201009T184500Z DTSTAMP:20260423T022915Z UID:PUHET/3 DESCRIPTION:Title: To wards a microscopic model of AdS fragmentation\nby Tarek Anous (Univer sity of Amsterdam) as part of Princeton HET seminar\n\n\nAbstract\nA salie nt feature of black holes near extremality is the appearance of an AdS$_2$ throat in their near-horizon geometry. Depending on the underlying theory \, these AdS$_2$ throats may be unstable to fragmentation\, wherein a sin gle throat is instead replaced by a tree-like structure of branched AdS$_2 $ throats. For Einstein-Maxwell theory\, the underlying reason behind this instability is the existence of multi-centered configuration in the modul i space of black hole solutions at fixed total charge. Given the success o f the Schwarzian/SYK paradigm for understanding a single AdS$_2$ it is tim e to revisit the fragmentation story. To build up intuition\, I will prese nt a model\, studied in the statistical mechanics literature\, that shares many features with SYK\, including exact solvability at large-N and an em ergent conformal symmetry that gets weakly broken in the UV. The novel fea ture of this model is the appearance of a spin glass phase at O(1) tempera tures\, which I will try to relate to the fragmentation story.\n LOCATION:https://researchseminars.org/talk/PUHET/3/ END:VEVENT END:VCALENDAR