BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Matthew Dodelson (CERN) DTSTART:20231211T100000Z DTEND:20231211T110000Z DTSTAMP:20260423T010528Z UID:NKUA-HEP/2 DESCRIPTION:Title: Black hole bulk-cone singularities\nby Matthew Dodelson (CERN) as par t of NKUA HEP Seminars\n\n\nAbstract\nCorrelators in field theories at fin ite temperature have singularities on the light cone. Are there any other singularities? In this talk I will address this question in the context of holographic theories in the black hole phase. Two points on the AdS bound ary can be connected by a null geodesic in the bulk\, leading to a so-call ed bulk-cone singularity. These new singularities were previously conjectu red by analyzing the geodesic approximation\, but we will derive them in f ull generality by developing the technology of thermal Regge theory. The f unctional form of the singularity leads to sharp signatures of the AdS pho ton sphere in the boundary CFT\, including an identification of the bounda ry dual of the angular velocity and Lyapunov exponent associated to the ph oton sphere. I will also comment on the resolution of the singularity by s tringy effects.\n LOCATION:https://researchseminars.org/talk/NKUA-HEP/2/ END:VEVENT END:VCALENDAR